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[ASP.net教程]5.在MVC中使用泛型仓储模式和工作单元来进行增删查改


      原文链接:http://www.c-sharpcorner.com/UploadFile/3d39b4/crud-operations-using-the-generic-repository-pattern-and-uni/

系列目录:

 

  • Relationship in Entity Framework Using Code First Approach With Fluent API【【使用EF Code-First方式和Fluent API来探讨EF中的关系】】
  • Code First Migrations with Entity Framework【使用EF 做数据库迁移】
  • CRUD Operations Using Entity Framework 5.0 Code First Approach in MVC【在MVC中使用EF 5.0做增删查改】
  • CRUD Operations Using the Repository Pattern in MVC【在MVC中使用仓储模式,来做增删查改】
  • CRUD Operations Using the Generic Repository Pattern and Unit of Work in MVC【在MVC中使用泛型仓储模式和工作单元来做增删查改】
  • CRUD Operations Using the Generic Repository Pattern and Dependency Injection in MVC【在MVC中使用泛型仓储模式和依赖注入,来做增删查改】

   

  这篇文章,我将会介绍在ASP.NET MVC应用程序中使用泛型仓储模式和工作单元。我将开发一个程序,对Book实体进行增删查改,为了保证这篇文章简单,便于大家理解泛型仓储模式和工作单元,在这篇文章中,我将只会使用一个Book实体。

在上篇文章中“4.CRUD Operations Using the Repository Pattern in MVC【在MVC中使用仓储模式进行增删查改】“讲到了仓储模式,里面我们为Book实体,创建了一个仓储类,但是这个仓储仅仅是只能为一个实体服务的。试想一下,如果是真正的企业级开发,我们会有很多实体,难道,我们要为每一个实体都创建一个仓储类么???显然是不现实的。对于这个问题,我们需要创建一个可以为所有实体公用的仓储,所以这里引入泛型仓储。这样就避免了重复编码。

下面的图中,讲到了两个开发者,讨论一个问题:"是否需要创建一个新的零件或者是利用已经存在的零件?"  ------如果你选择第一种,那么就是这篇文章讲到的,"4.CRUD Operations Using the Repository Pattern in MVC【在MVC中使用仓储模式进行增删查改】"

但我在这里选择第二种,也就是这篇文章,我将要讲到的。--使用泛型仓储模式来重用代码,减少冗余代码。

 

既然说到仓储,那么什么是仓储模式呢?

仓储模式旨在数据访问层和业务逻辑层之间创建一个抽象层。仓储模式是数据访问模式,旨在达到数据访问的更松散的耦合性。我们在单独的类,或者类库中创建数据访问的逻辑,这就是仓储。仓储的职责就是和业务逻辑层进行通信。

在这篇文章中,我将会为所有的实体设计一个公共的泛型仓储,另外还有一个工作单元类。这个工作单元类,为每个实体创建仓储的实例,然后仓储实例用来做增删查改操作。我在控制器中创建工作单元类的实例,然后依据具体的实体,创建仓储的实例,然后就可以使用仓储中的方法进行每个操作了。

下面的图表显示了仓储和EF数据上下文之间的关系。在图中,MVC控制器直接通过工作单元和仓储进行交互,而不是直接和EF进行交互。

 

 

讲到这里,大家可能就会有疑问了,为什么要使用工作单元呢???

工作单元就像它的名字一样,做某件事情。在这篇文章中,工作单元主要做的是:我们创建工作单元的实例,然后工作单元为我们初始化EF数据上下文,然后每个仓储的实例都使用同一个数据上下文实例进行数据库操作。因此工作单元就是,用来确保所有的仓储实例都使用同一个数据上下文实例。

 

好了理论到此为止,讲的差不多了。现在我们开始进入正题:

 

先看看项目的结构:

 

这三个项目就不用做过多介绍了吧,前面的文章已经说了很多次了...

 

EF.Entity类库中,添加BaseEntity实体:

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace EF.Entity{  public abstract class BaseEntity  {    /// <summary>    /// ID编号    /// </summary>    public int ID { get; set; }    /// <summary>    /// 添加时间    /// </summary>    public DateTime AddedDate { get; set; }    /// <summary>    /// 修改时间    /// </summary>    public DateTime ModifiedDate { get; set; }    /// <summary>    /// IP地址    /// </summary>    public string IP { get; set; }  }}

Book实体:

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace EF.Entity{  public class Book:BaseEntity  {    /// <summary>    /// 书名    /// </summary>    public string Title { get; set; }    /// <summary>    /// 作者    /// </summary>    public string Author { get; set; }    /// <summary>    /// ISBN编号    /// </summary>    public string ISBN { get; set; }    /// <summary>    /// 出版时间    /// </summary>    public DateTime PublishedDate { get; set; }  }}

Entity.Data类库中BookMap类:

using EF.Entity;using System;using System.Collections.Generic;using System.ComponentModel.DataAnnotations.Schema;using System.Data.Entity.ModelConfiguration;using System.Linq;using System.Text;using System.Threading.Tasks;namespace EF.Data{  public class BookMap:EntityTypeConfiguration<Book>  {    public BookMap()    {      //配置主键      this.HasKey(s => s.ID);      //配置字段      this.Property(s => s.ID).HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity);      this.Property(s => s.Author).HasColumnType("nvarchar").HasMaxLength(50).IsRequired();      this.Property(s => s.AddedDate).IsRequired();      this.Property(s => s.IP).IsOptional();      this.Property(s => s.ISBN).HasColumnType("nvarchar").HasMaxLength(50).IsRequired();      this.Property(s => s.ModifiedDate).IsOptional();      this.Property(s => s.PublishedDate).IsRequired();      this.Property(s => s.Title).HasColumnType("nvarchar").HasMaxLength(50).IsRequired();      //配置表名      this.ToTable("Books");    }  }}

EF数据上下文类:

using System;using System.Collections.Generic;using System.Data.Entity;using System.Data.Entity.ModelConfiguration;using System.Linq;using System.Reflection;using System.Text;using System.Threading.Tasks;namespace EF.Data{  public class EFDbContext:DbContext  {    public EFDbContext()      : base("name=DbConnectionString")    { }    protected override void OnModelCreating(DbModelBuilder modelBuilder)    {      var typesToRegister = Assembly.GetExecutingAssembly().GetTypes()   .Where(type => !String.IsNullOrEmpty(type.Namespace))   .Where(type => type.BaseType != null && type.BaseType.IsGenericType     && type.BaseType.GetGenericTypeDefinition() == typeof(EntityTypeConfiguration<>));      foreach (var type in typesToRegister)      {        dynamic configurationInstance = Activator.CreateInstance(type);        modelBuilder.Configurations.Add(configurationInstance);      }       //base.OnModelCreating(modelBuilder);    }  }}

 

然后启用数据库迁移,自动生成数据库,这里的步骤就省略了,因为前面的文章已经说了。

接着,在EF.Data项目中创建泛型仓储类,里面提供了增删查改的方法,这个泛型的仓储类中,有一个带DbContext参数的构造函数,所以当我们实例化仓储的时候,传递一个数据上下文对象给仓储,所有的实体就可以使用同一个数据上下文对象了。我们使用了数据上下文的SaveChange方法,但是你同样可以使用工作单元类的Save方法,因为这两者使用的是同一个数据上下文对象,下面是泛型的仓储类代码:【为了使文章更容易理解,这里我不创建泛型的仓储接口】。

 

 1 using EF.Entity; 2 using System; 3 using System.Collections.Generic; 4 using System.Data.Entity; 5 using System.Data.Entity.Validation; 6 using System.Linq; 7 using System.Text; 8 using System.Threading.Tasks; 9  10 namespace EF.Data 11 { 12   /// <summary> 13   /// 泛型仓储类 14   /// </summary> 15   /// <typeparam name="T"></typeparam> 16  public class Repository<T> where T:BaseEntity 17   { 18    /// <summary> 19    /// 数据上下文变量 20    /// </summary> 21    private readonly EFDbContext db; 22    string errorMessage = string.Empty; 23  24    #region 封装属性 25    /// <summary> 26    /// 实体访问字段 27    /// </summary> 28    private IDbSet<T> entities; 29  30    /// <summary> 31    /// 封装属性 32    /// </summary> 33    public IDbSet<T> Entities 34     { 35      get 36       { 37        if (entities == null) 38         { 39          return entities = db.Set<T>(); 40         } 41        else 42         { 43          return entities;  44         } 45       } 46     }  47    #endregion 48  49    #region 构造函数 50    public Repository(EFDbContext context) 51     { 52      this.db = context; 53     }  54    #endregion 55  56    #region 泛型方法--根据Id查找实体 57    /// <summary> 58    /// 泛型方法--根据Id查找实体 59    /// </summary> 60    /// <param name="id"></param> 61    /// <returns></returns> 62    public T GetById(int id) 63     { 64      return this.entities.Find(id); 65     }  66    #endregion 67  68    #region Insert 69    public void Insert(T entity) 70     { 71      try 72       { 73        if (entity == null) 74         { 75          throw new ArgumentNullException("entity"); 76         } 77        else 78         { 79          this.Entities.Add(entity);//把实体的状态设置为Added 80          this.db.SaveChanges();//保存到数据库 81         } 82       } 83      catch (DbEntityValidationException dbEx)//DbEntityValidationException 84       { 85        foreach (var validationErrors in dbEx.EntityValidationErrors) 86         { 87          foreach (var item in validationErrors.ValidationErrors) 88           { 89            errorMessage += string.Format("Property:{0} Error:{1}", item.PropertyName, item.ErrorMessage) + Environment.NewLine; 90           } 91         } 92        throw new Exception(errorMessage, dbEx); 93       } 94     }  95    #endregion 96  97    #region Update 98    public void Update(T entity) 99     {100      try101       {102        if (entity == null)103         {104          throw new ArgumentNullException("entity");105         }106        else107         {108          this.db.SaveChanges();//保存到数据库109         }110       }111      catch (DbEntityValidationException dbEx)112       {113        foreach (var validationErrors in dbEx.EntityValidationErrors)114         {115          foreach (var error in validationErrors.ValidationErrors)116           {117            errorMessage += string.Format("Property:{0} Error:{1}", error.PropertyName, error.ErrorMessage) + Environment.NewLine;118           }119         }120        //抛出捕获的异常121        throw new Exception(errorMessage, dbEx);122       }123     } 124    #endregion125 126    #region Delete127    public void Delete(T entity)128     {129      try130       {131        if (entity == null)132         {133          throw new ArgumentException("entity");134         }135        else136         {137          this.db.Entry(entity).State = EntityState.Deleted;138          this.db.SaveChanges();139         }140       }141      catch (DbEntityValidationException dbEx)142       {143        foreach (var validationErrors in dbEx.EntityValidationErrors)144         {145          foreach (var error in validationErrors.ValidationErrors)146           {147            errorMessage += string.Format("Property:{0} Error:{1}", error.PropertyName, error.ErrorMessage) + Environment.NewLine;148           }149         }150 151        throw new Exception(errorMessage, dbEx);152       }153     } 154    #endregion155 156    #region Table157    public virtual IQueryable<T> Table158     {159      get160       {161        return this.Entities;162       }163     } 164    #endregion165 166 167   }168 }

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下面创建工作单元类,UnitOfWork,这个工作单元类继承自IDisposable接口,所以它的实例将会在每个控制器中被 释放掉。工作单元类初始化了程序的上下文,工作单元类的核心就是Repository<T>() 类型的泛型方法,这个方法为继承自BaseEntity的每个实体返回了仓储实例。下面是工作单元类的代码:

using EF.Entity;using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace EF.Data{  public class UnitOfWork : IDisposable  {    private readonly EFDbContext db;    private bool disposed;    private Dictionary<string, object> repositories;    public UnitOfWork(EFDbContext context)    {      this.db = context; //构造函数中初始化上下文对象    }    public UnitOfWork()    {      db = new EFDbContext(); //构造函数中初始化上下文对象    }    #region Dispose    public void Dispose()    {      Dispose(true);      GC.SuppressFinalize(this);    }    public virtual void Dispose(bool disposing)    {      if (!disposed)      {        if (disposing)        {          db.Dispose();        }      }      disposed = true;    }    #endregion    #region Save    public void Save()    {      db.SaveChanges();    }     #endregion    #region Repository<T>()    public Repository<T> Repository<T>() where T : BaseEntity    {      if (repositories == null)      {        repositories = new Dictionary<string, object>();      }      var type = typeof(T).Name;//获取当前成员名称      if (!repositories.ContainsKey(type))//如果repositories中不包含Name      {        var repositoryType = typeof(Repository<>);//获取Repository<>类型        var repositoryInstance = Activator.CreateInstance(repositoryType.MakeGenericType(typeof(T)), db);        repositories.Add(type, repositoryInstance);      }      return (Repository<T>)repositories[type];    }     #endregion  }}

 

 

 好了,底层的代码,写完了,现在开始写控制器的代码:我们创建一个Book控制器,进行增删查改。

using EF.Data;using EF.Entity;using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.Mvc;namespace EF.Web.Controllers{  public class BookController : Controller  {    //创建并实例化工作单元来    private UnitOfWork unitOfWork = new UnitOfWork();    private Repository<Book> bookRepository;    public BookController()    {      //控制器的构造函数中,通过工作单元类的实例,来调用Repository<T>方法,实例化Book仓储      bookRepository = unitOfWork.Repository<Book>();    }        #region Index    public ActionResult Index()    {      IEnumerable<Book> lstBooks = bookRepository.Table.ToList();      return View(lstBooks);    }     #endregion    #region CreateEditBook    public ActionResult CreateEditBook(int? id)    {      Book model = new Book();      if (id.HasValue) //如果ID有值      {        model = bookRepository.GetById(id.Value);        return View(model);      }      else      {        return View(model);      }    }        [HttpPost]    public ActionResult CreateEditBook(Book model)    {      if (model.ID == 0)//ID为0表示是添加      {        model.AddedDate = DateTime.Now;        model.ModifiedDate = DateTime.Now;        model.IP = Request.UserHostAddress;//获取客户端的主机地址        bookRepository.Insert(model);      }      else //ID不为0,表示是修改      {        Book editModel= bookRepository.GetById(model.ID);        editModel.Author = model.Author;        editModel.ISBN = model.ISBN;        editModel.Title = model.Title;        editModel.PublishedDate = model.PublishedDate;        editModel.ModifiedDate = model.ModifiedDate;        editModel.IP = Request.UserHostAddress;        bookRepository.Update(editModel);      }      if (model.ID > 0)      {        return RedirectToAction("Index");      }      return View(model);    }    #endregion    #region DeleteBook    public ActionResult DeleteBook(int id)    {      Book model = bookRepository.GetById(id);      return View(model);    }    [HttpPost, ActionName("DeleteBook")]    public ActionResult ConfirmDeleteBook(int id)    {      Book model = bookRepository.GetById(id);      bookRepository.Delete(model);      return RedirectToAction("Index");    }      #endregion    #region DetailBook    public ActionResult DetailBook(int id)    {      Book model = bookRepository.GetById(id);      return View(model);    }     #endregion    #region Dispose    protected override void Dispose(bool disposing)    {      unitOfWork.Dispose();      base.Dispose(disposing);    }      #endregion  }}

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Index 视图代码:

@model IEnumerable<EF.Entity.Book><div class="book-example panel panel-primary">  <div class="panel-heading panel-head">Books Listing</div>  <div class="panel-body">    <a id="createEditBookModal" href="@Url.Action("CreateEditBook")" class="btn btn-success">      <span class="glyphicon glyphicon-plus"></span>Book    </a>    <table class="table" style="margin: 4px">      <tr>        <th>          @Html.DisplayNameFor(model => model.Title)        </th>        <th>          @Html.DisplayNameFor(model => model.Author)        </th>        <th>          @Html.DisplayNameFor(model => model.ISBN)        </th>        <th>          Action        </th>        <th></th>      </tr>      @foreach (var item in Model)      {        <tr>          <td>            @Html.DisplayFor(modelItem => item.Title)          </td>          <td>            @Html.DisplayFor(modelItem => item.Author)          </td>          <td>            @Html.DisplayFor(modelItem => item.ISBN)          </td>          <td>            @Html.ActionLink("Edit", "CreateEditBook", new { id = item.ID }, new { @class = "btn btn-success" }) |            @Html.ActionLink("Details", "DetailBook", new { id = item.ID }, new { @class = "btn btn-primary" }) |            @Html.ActionLink("Delete", "DeleteBook", new { id = item.ID }, new { @class = "btn btn-danger" })          </td>        </tr>      }    </table>  </div></div> 

CraeteEdit视图代码:

@model EF.Entity.Book@{  ViewBag.Title = "Create Edit Book";}<div class="book-example panel panel-primary">  <div class="panel-heading panel-head">Add / Edit Book</div>  <div class="panel-body">    @using (Html.BeginForm())    {      <div class="form-horizontal">        <div class="form-group">          @Html.LabelFor(model => model.Title, new { @class = "col-lg-1 control-label" })          <div class="col-lg-9">            @Html.TextBoxFor(model => model.Title, new { @class = "form-control" })          </div>        </div>        <div class="form-group">          @Html.LabelFor(model => model.ISBN, new { @class = "col-lg-1 control-label" })          <div class="col-lg-9">            @Html.TextBoxFor(model => model.ISBN, new { @class = "form-control" })          </div>        </div>        <div class="form-group">          @Html.LabelFor(model => model.Author, new { @class = "col-lg-1 control-label" })          <div class="col-lg-9">            @Html.TextBoxFor(model => model.Author, new { @class = "form-control" })          </div>        </div>        <div class="form-group">          @Html.LabelFor(model => model.Published, new { @class = "col-lg-1 control-label" })          <div class="col-lg-9">            @Html.TextBoxFor(model => model.Published, new { @class = "form-control datepicker" })          </div>        </div>        <div class="form-group">          <div class="col-lg-8"></div>          <div class="col-lg-3">            @Html.ActionLink("Back to List", "Index", null, new { @class = "btn btn-default" })            <button class="btn btn-success" id="btnSubmit" type="submit">              Submit            </button>          </div>        </div>      </div>    }  </div></div>@section scripts  这里的话,在布局页中要添加这个块: @RenderSection("scripts", required: false){  <script src="~/Scripts/bootstrap-datepicker.js" type="text/javascript"></script>  <script src="~/Scripts/book-create-edit.js" type="text/javascript"></script>} 

DeleteBook视图:

@model EF.Entity.Book@{  ViewBag.Title = "Delete Book";}<div class="book-example panel panel-primary">  <div class="panel-heading panel-head">Delete Book</div>  <div class="panel-body">    <h3>Are you sure you want to delete this?</h3>    <h1>@ViewBag.ErrorMessage</h1>    <div class="form-horizontal">      <div class="form-group">        @Html.LabelFor(model => model.Title, new { @class = "col-lg-1 control-label" })        <div class="col-lg-9">          @Html.DisplayFor(model => model.Title, new { @class = "form-control" })        </div>      </div>      <div class="form-group">        @Html.LabelFor(model => model.Author, new { @class = "col-lg-1 control-label" })        <div class="col-lg-9">          @Html.DisplayFor(model => model.Author, new { @class = "form-control" })        </div>      </div>      <div class="form-group">        @Html.LabelFor(model => model.ISBN, new { @class = "col-lg-1 control-label" })        <div class="col-lg-9">          @Html.DisplayFor(model => model.ISBN, new { @class = "form-control" })        </div>      </div>      <div class="form-group">        @Html.LabelFor(model => model.Published, new { @class = "col-lg-1 control-label" })        <div class="col-lg-9">          @Html.DisplayFor(model => model.Published, new { @class = "form-control" })        </div>      </div>      <div class="form-group">        @Html.LabelFor(model => model.AddedDate, new { @class = "col-lg-1 control-label" })        <div class="col-lg-9">          @Html.DisplayFor(model => model.AddedDate, new { @class = "form-control" })        </div>      </div>      <div class="form-group">        @Html.LabelFor(model => model.ModifiedDate, new { @class = "col-lg-1 control-label" })        <div class="col-lg-9">          @Html.DisplayFor(model => model.ModifiedDate, new { @class = "form-control" })        </div>      </div>      <div class="form-group">        @Html.LabelFor(model => model.IP, new { @class = "col-lg-1 control-label" })        <div class="col-lg-9">          @Html.DisplayFor(model => model.IP, new { @class = "form-control" })        </div>      </div>      @using (Html.BeginForm())      {        <div class="form-group">          <div class="col-lg-1"></div>          <div class="col-lg-9">            <input type="submit" value="Delete" class="btn btn-danger" />            @Html.ActionLink("Back to List", "Index", null, new { @class = "btn btn-success" })          </div>        </div>      }    </div>  </div></div> 

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Detail视图:

@model EF.Entity.Book@{  ViewBag.Title = "Detail Book";}<div class="book-example panel panel-primary">  <div class="panel-heading panel-head">Book Detail</div>  <div class="panel-body">    <div class="form-horizontal">      <div class="form-group">        @Html.LabelFor(model => model.Title, new { @class = "col-lg-1 control-label" })        <div class="col-lg-9">          @Html.DisplayFor(model => model.Title, new { @class = "form-control" })        </div>      </div>      <div class="form-group">        @Html.LabelFor(model => model.Author, new { @class = "col-lg-1 control-label" })        <div class="col-lg-9">          @Html.DisplayFor(model => model.Author, new { @class = "form-control" })        </div>      </div>      <div class="form-group">        @Html.LabelFor(model => model.ISBN, new { @class = "col-lg-1 control-label" })        <div class="col-lg-9">          @Html.DisplayFor(model => model.ISBN, new { @class = "form-control" })        </div>      </div>      <div class="form-group">        @Html.LabelFor(model => model.Published, new { @class = "col-lg-1 control-label" })        <div class="col-lg-9">          @Html.DisplayFor(model => model.Published, new { @class = "form-control" })        </div>      </div>      <div class="form-group">        @Html.LabelFor(model => model.AddedDate, new { @class = "col-lg-1 control-label" })        <div class="col-lg-9">          @Html.DisplayFor(model => model.AddedDate, new { @class = "form-control" })        </div>      </div>      <div class="form-group">        @Html.LabelFor(model => model.ModifiedDate, new { @class = "col-lg-1 control-label" })        <div class="col-lg-9">          @Html.DisplayFor(model => model.ModifiedDate, new { @class = "form-control" })        </div>      </div>      <div class="form-group">        @Html.LabelFor(model => model.IP, new { @class = "col-lg-1 control-label" })        <div class="col-lg-9">          @Html.DisplayFor(model => model.IP, new { @class = "form-control" })        </div>      </div>      @using (Html.BeginForm())      {        <div class="form-group">          <div class="col-lg-1"></div>          <div class="col-lg-9">            @Html.ActionLink("Edit", "CreateEditBook", new { id = Model.ID }, new { @class = "btn btn-primary" })            @Html.ActionLink("Back to List", "Index", null, new { @class = "btn btn-success" })          </div>        </div>      }    </div>  </div></div> 

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修改一下默认路由为Book控制器,Index方法,然后运行项目》》》

 后记:

用到的两个js文件

book-create-edit.js

(function ($) {  function Book() {    var $this = this;    function initializeAddEditBook() {      $('.datepicker').datepicker({        "setDate": new Date(),        "autoclose": true      });          }    $this.init = function () {            initializeAddEditBook();    }  }  $(function () {    var self = new Book();    self.init();  });}(jQuery))

View Code

bootstrap-datepicker.js

/* ========================================================= * bootstrap-datepicker.js * Repo: https://github.com/eternicode/bootstrap-datepicker/ * Demo: http://eternicode.github.io/bootstrap-datepicker/ * Docs: http://bootstrap-datepicker.readthedocs.org/ * Forked from http://www.eyecon.ro/bootstrap-datepicker * ========================================================= * Started by Stefan Petre; improvements by Andrew Rowls + contributors * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * ========================================================= */(function($, undefined){  var $window = $(window);  function UTCDate(){    return new Date(Date.UTC.apply(Date, arguments));  }  function UTCToday(){    var today = new Date();    return UTCDate(today.getFullYear(), today.getMonth(), today.getDate());  }  function alias(method){    return function(){      return this[method].apply(this, arguments);    };  }  var DateArray = (function(){    var extras = {      get: function(i){        return this.slice(i)[0];      },      contains: function(d){        // Array.indexOf is not cross-browser;        // $.inArray doesn't work with Dates        var val = d && d.valueOf();        for (var i=0, l=this.length; i < l; i++)          if (this[i].valueOf() === val)            return i;        return -1;      },      remove: function(i){        this.splice(i,1);      },      replace: function(new_array){        if (!new_array)          return;        if (!$.isArray(new_array))          new_array = [new_array];        this.clear();        this.push.apply(this, new_array);      },      clear: function(){        this.splice(0);      },      copy: function(){        var a = new DateArray();        a.replace(this);        return a;      }    };    return function(){      var a = [];      a.push.apply(a, arguments);      $.extend(a, extras);      return a;    };  })();  // Picker object  var Datepicker = function(element, options){    this.dates = new DateArray();    this.viewDate = UTCToday();    this.focusDate = null;    this._process_options(options);    this.element = $(element);    this.isInline = false;    this.isInput = this.element.is('input');    this.component = this.element.is('.date') ? this.element.find('.add-on, .input-group-addon, .btn') : false;    this.hasInput = this.component && this.element.find('input').length;    if (this.component && this.component.length === 0)      this.component = false;    this.picker = $(DPGlobal.template);    this._buildEvents();    this._attachEvents();    if (this.isInline){      this.picker.addClass('datepicker-inline').appendTo(this.element);    }    else {      this.picker.addClass('datepicker-dropdown dropdown-menu');    }    if (this.o.rtl){      this.picker.addClass('datepicker-rtl');    }    this.viewMode = this.o.startView;    if (this.o.calendarWeeks)      this.picker.find('tfoot th.today')            .attr('colspan', function(i, val){              return parseInt(val) + 1;            });    this._allow_update = false;    this.setStartDate(this._o.startDate);    this.setEndDate(this._o.endDate);    this.setDaysOfWeekDisabled(this.o.daysOfWeekDisabled);    this.fillDow();    this.fillMonths();    this._allow_update = true;    this.update();    this.showMode();    if (this.isInline){      this.show();    }  };  Datepicker.prototype = {    constructor: Datepicker,    _process_options: function(opts){      // Store raw options for reference      this._o = $.extend({}, this._o, opts);      // Processed options      var o = this.o = $.extend({}, this._o);      // Check if "de-DE" style date is available, if not language should      // fallback to 2 letter code eg "de"      var lang = o.language;      if (!dates[lang]){        lang = lang.split('-')[0];        if (!dates[lang])          lang = defaults.language;      }      o.language = lang;      switch (o.startView){        case 2:        case 'decade':          o.startView = 2;          break;        case 1:        case 'year':          o.startView = 1;          break;        default:          o.startView = 0;      }      switch (o.minViewMode){        case 1:        case 'months':          o.minViewMode = 1;          break;        case 2:        case 'years':          o.minViewMode = 2;          break;        default:          o.minViewMode = 0;      }      o.startView = Math.max(o.startView, o.minViewMode);      // true, false, or Number > 0      if (o.multidate !== true){        o.multidate = Number(o.multidate) || false;        if (o.multidate !== false)          o.multidate = Math.max(0, o.multidate);        else          o.multidate = 1;      }      o.multidateSeparator = String(o.multidateSeparator);      o.weekStart %= 7;      o.weekEnd = ((o.weekStart + 6) % 7);      var format = DPGlobal.parseFormat(o.format);      if (o.startDate !== -Infinity){        if (!!o.startDate){          if (o.startDate instanceof Date)            o.startDate = this._local_to_utc(this._zero_time(o.startDate));          else            o.startDate = DPGlobal.parseDate(o.startDate, format, o.language);        }        else {          o.startDate = -Infinity;        }      }      if (o.endDate !== Infinity){        if (!!o.endDate){          if (o.endDate instanceof Date)            o.endDate = this._local_to_utc(this._zero_time(o.endDate));          else            o.endDate = DPGlobal.parseDate(o.endDate, format, o.language);        }        else {          o.endDate = Infinity;        }      }      o.daysOfWeekDisabled = o.daysOfWeekDisabled||[];      if (!$.isArray(o.daysOfWeekDisabled))        o.daysOfWeekDisabled = o.daysOfWeekDisabled.split(/[,\s]*/);      o.daysOfWeekDisabled = $.map(o.daysOfWeekDisabled, function(d){        return parseInt(d, 10);      });      var plc = String(o.orientation).toLowerCase().split(/\s+/g),        _plc = o.orientation.toLowerCase();      plc = $.grep(plc, function(word){        return (/^auto|left|right|top|bottom$/).test(word);      });      o.orientation = {x: 'auto', y: 'auto'};      if (!_plc || _plc === 'auto')        ; // no action      else if (plc.length === 1){        switch (plc[0]){          case 'top':          case 'bottom':            o.orientation.y = plc[0];            break;          case 'left':          case 'right':            o.orientation.x = plc[0];            break;        }      }      else {        _plc = $.grep(plc, function(word){          return (/^left|right$/).test(word);        });        o.orientation.x = _plc[0] || 'auto';        _plc = $.grep(plc, function(word){          return (/^top|bottom$/).test(word);        });        o.orientation.y = _plc[0] || 'auto';      }    },    _events: [],    _secondaryEvents: [],    _applyEvents: function(evs){      for (var i=0, el, ch, ev; i < evs.length; i++){        el = evs[i][0];        if (evs[i].length === 2){          ch = undefined;          ev = evs[i][1];        }        else if (evs[i].length === 3){          ch = evs[i][1];          ev = evs[i][2];        }        el.on(ev, ch);      }    },    _unapplyEvents: function(evs){      for (var i=0, el, ev, ch; i < evs.length; i++){        el = evs[i][0];        if (evs[i].length === 2){          ch = undefined;          ev = evs[i][1];        }        else if (evs[i].length === 3){          ch = evs[i][1];          ev = evs[i][2];        }        el.off(ev, ch);      }    },    _buildEvents: function(){      if (this.isInput){ // single input        this._events = [          [this.element, {            focus: $.proxy(this.show, this),            keyup: $.proxy(function(e){              if ($.inArray(e.keyCode, [27,37,39,38,40,32,13,9]) === -1)                this.update();            }, this),            keydown: $.proxy(this.keydown, this)          }]        ];      }      else if (this.component && this.hasInput){ // component: input + button        this._events = [          // For components that are not readonly, allow keyboard nav          [this.element.find('input'), {            focus: $.proxy(this.show, this),            keyup: $.proxy(function(e){              if ($.inArray(e.keyCode, [27,37,39,38,40,32,13,9]) === -1)                this.update();            }, this),            keydown: $.proxy(this.keydown, this)          }],          [this.component, {            click: $.proxy(this.show, this)          }]        ];      }      else if (this.element.is('div')){ // inline datepicker        this.isInline = true;      }      else {        this._events = [          [this.element, {            click: $.proxy(this.show, this)          }]        ];      }      this._events.push(        // Component: listen for blur on element descendants        [this.element, '*', {          blur: $.proxy(function(e){            this._focused_from = e.target;          }, this)        }],        // Input: listen for blur on element        [this.element, {          blur: $.proxy(function(e){            this._focused_from = e.target;          }, this)        }]      );      this._secondaryEvents = [        [this.picker, {          click: $.proxy(this.click, this)        }],        [$(window), {          resize: $.proxy(this.place, this)        }],        [$(document), {          'mousedown touchstart': $.proxy(function(e){            // Clicked outside the datepicker, hide it            if (!(              this.element.is(e.target) ||              this.element.find(e.target).length ||              this.picker.is(e.target) ||              this.picker.find(e.target).length            )){              this.hide();            }          }, this)        }]      ];    },    _attachEvents: function(){      this._detachEvents();      this._applyEvents(this._events);    },    _detachEvents: function(){      this._unapplyEvents(this._events);    },    _attachSecondaryEvents: function(){      this._detachSecondaryEvents();      this._applyEvents(this._secondaryEvents);    },    _detachSecondaryEvents: function(){      this._unapplyEvents(this._secondaryEvents);    },    _trigger: function(event, altdate){      var date = altdate || this.dates.get(-1),        local_date = this._utc_to_local(date);      this.element.trigger({        type: event,        date: local_date,        dates: $.map(this.dates, this._utc_to_local),        format: $.proxy(function(ix, format){          if (arguments.length === 0){            ix = this.dates.length - 1;            format = this.o.format;          }          else if (typeof ix === 'string'){            format = ix;            ix = this.dates.length - 1;          }          format = format || this.o.format;          var date = this.dates.get(ix);          return DPGlobal.formatDate(date, format, this.o.language);        }, this)      });    },    show: function(){      if (!this.isInline)        this.picker.appendTo('body');      this.picker.show();      this.place();      this._attachSecondaryEvents();      this._trigger('show');    },    hide: function(){      if (this.isInline)        return;      if (!this.picker.is(':visible'))        return;      this.focusDate = null;      this.picker.hide().detach();      this._detachSecondaryEvents();      this.viewMode = this.o.startView;      this.showMode();      if (        this.o.forceParse &&        (          this.isInput && this.element.val() ||          this.hasInput && this.element.find('input').val()        )      )        this.setValue();      this._trigger('hide');    },    remove: function(){      this.hide();      this._detachEvents();      this._detachSecondaryEvents();      this.picker.remove();      delete this.element.data().datepicker;      if (!this.isInput){        delete this.element.data().date;      }    },    _utc_to_local: function(utc){      return utc && new Date(utc.getTime() + (utc.getTimezoneOffset()*60000));    },    _local_to_utc: function(local){      return local && new Date(local.getTime() - (local.getTimezoneOffset()*60000));    },    _zero_time: function(local){      return local && new Date(local.getFullYear(), local.getMonth(), local.getDate());    },    _zero_utc_time: function(utc){      return utc && new Date(Date.UTC(utc.getUTCFullYear(), utc.getUTCMonth(), utc.getUTCDate()));    },    getDates: function(){      return $.map(this.dates, this._utc_to_local);    },    getUTCDates: function(){      return $.map(this.dates, function(d){        return new Date(d);      });    },    getDate: function(){      return this._utc_to_local(this.getUTCDate());    },    getUTCDate: function(){      return new Date(this.dates.get(-1));    },    setDates: function(){      var args = $.isArray(arguments[0]) ? arguments[0] : arguments;      this.update.apply(this, args);      this._trigger('changeDate');      this.setValue();    },    setUTCDates: function(){      var args = $.isArray(arguments[0]) ? arguments[0] : arguments;      this.update.apply(this, $.map(args, this._utc_to_local));      this._trigger('changeDate');      this.setValue();    },    setDate: alias('setDates'),    setUTCDate: alias('setUTCDates'),    setValue: function(){      var formatted = this.getFormattedDate();      if (!this.isInput){        if (this.component){          this.element.find('input').val(formatted).change();        }      }      else {        this.element.val(formatted).change();      }    },    getFormattedDate: function(format){      if (format === undefined)        format = this.o.format;      var lang = this.o.language;      return $.map(this.dates, function(d){        return DPGlobal.formatDate(d, format, lang);      }).join(this.o.multidateSeparator);    },    setStartDate: function(startDate){      this._process_options({startDate: startDate});      this.update();      this.updateNavArrows();    },    setEndDate: function(endDate){      this._process_options({endDate: endDate});      this.update();      this.updateNavArrows();    },    setDaysOfWeekDisabled: function(daysOfWeekDisabled){      this._process_options({daysOfWeekDisabled: daysOfWeekDisabled});      this.update();      this.updateNavArrows();    },    place: function(){      if (this.isInline)        return;      var calendarWidth = this.picker.outerWidth(),        calendarHeight = this.picker.outerHeight(),        visualPadding = 10,        windowWidth = $window.width(),        windowHeight = $window.height(),        scrollTop = $window.scrollTop();      var zIndex = parseInt(this.element.parents().filter(function(){          return $(this).css('z-index') !== 'auto';      }).first().css('z-index')) + 10;      var offset = this.component ? this.component.parent().offset() : this.element.offset();      var height = this.component ? this.component.outerHeight(true) : this.element.outerHeight(false);      var width = this.component ? this.component.outerWidth(true) : this.element.outerWidth(false);      var left = offset.left,        top = offset.top;      this.picker.removeClass(        'datepicker-orient-top datepicker-orient-bottom '+        'datepicker-orient-right datepicker-orient-left'      );      if (this.o.orientation.x !== 'auto'){        this.picker.addClass('datepicker-orient-' + this.o.orientation.x);        if (this.o.orientation.x === 'right')          left -= calendarWidth - width;      }      // auto x orientation is best-placement: if it crosses a window      // edge, fudge it sideways      else {        // Default to left        this.picker.addClass('datepicker-orient-left');        if (offset.left < 0)          left -= offset.left - visualPadding;        else if (offset.left + calendarWidth > windowWidth)          left = windowWidth - calendarWidth - visualPadding;      }      // auto y orientation is best-situation: top or bottom, no fudging,      // decision based on which shows more of the calendar      var yorient = this.o.orientation.y,        top_overflow, bottom_overflow;      if (yorient === 'auto'){        top_overflow = -scrollTop + offset.top - calendarHeight;        bottom_overflow = scrollTop + windowHeight - (offset.top + height + calendarHeight);        if (Math.max(top_overflow, bottom_overflow) === bottom_overflow)          yorient = 'top';        else          yorient = 'bottom';      }      this.picker.addClass('datepicker-orient-' + yorient);      if (yorient === 'top')        top += height;      else        top -= calendarHeight + parseInt(this.picker.css('padding-top'));      this.picker.css({        top: top,        left: left,        zIndex: zIndex      });    },    _allow_update: true,    update: function(){      if (!this._allow_update)        return;      var oldDates = this.dates.copy(),        dates = [],        fromArgs = false;      if (arguments.length){        $.each(arguments, $.proxy(function(i, date){          if (date instanceof Date)            date = this._local_to_utc(date);          dates.push(date);        }, this));        fromArgs = true;      }      else {        dates = this.isInput            ? this.element.val()            : this.element.data('date') || this.element.find('input').val();        if (dates && this.o.multidate)          dates = dates.split(this.o.multidateSeparator);        else          dates = [dates];        delete this.element.data().date;      }      dates = $.map(dates, $.proxy(function(date){        return DPGlobal.parseDate(date, this.o.format, this.o.language);      }, this));      dates = $.grep(dates, $.proxy(function(date){        return (          date < this.o.startDate ||          date > this.o.endDate ||          !date        );      }, this), true);      this.dates.replace(dates);      if (this.dates.length)        this.viewDate = new Date(this.dates.get(-1));      else if (this.viewDate < this.o.startDate)        this.viewDate = new Date(this.o.startDate);      else if (this.viewDate > this.o.endDate)        this.viewDate = new Date(this.o.endDate);      if (fromArgs){        // setting date by clicking        this.setValue();      }      else if (dates.length){        // setting date by typing        if (String(oldDates) !== String(this.dates))          this._trigger('changeDate');      }      if (!this.dates.length && oldDates.length)        this._trigger('clearDate');      this.fill();    },    fillDow: function(){      var dowCnt = this.o.weekStart,        html = '<tr>';      if (this.o.calendarWeeks){        var cell = '<th >&nbsp;</th>';        html += cell;        this.picker.find('.datepicker-days thead tr:first-child').prepend(cell);      }      while (dowCnt < this.o.weekStart + 7){        html += '<th >'+dates[this.o.language].daysMin[(dowCnt++)%7]+'</th>';      }      html += '</tr>';      this.picker.find('.datepicker-days thead').append(html);    },    fillMonths: function(){      var html = '',      i = 0;      while (i < 12){        html += '<span >'+dates[this.o.language].monthsShort[i++]+'</span>';      }      this.picker.find('.datepicker-months td').html(html);    },    setRange: function(range){      if (!range || !range.length)        delete this.range;      else        this.range = $.map(range, function(d){          return d.valueOf();        });      this.fill();    },    getClassNames: function(date){      var cls = [],        year = this.viewDate.getUTCFullYear(),        month = this.viewDate.getUTCMonth(),        today = new Date();      if (date.getUTCFullYear() < year || (date.getUTCFullYear() === year && date.getUTCMonth() < month)){        cls.push('old');      }      else if (date.getUTCFullYear() > year || (date.getUTCFullYear() === year && date.getUTCMonth() > month)){        cls.push('new');      }      if (this.focusDate && date.valueOf() === this.focusDate.valueOf())        cls.push('focused');      // Compare internal UTC date with local today, not UTC today      if (this.o.todayHighlight &&        date.getUTCFullYear() === today.getFullYear() &&        date.getUTCMonth() === today.getMonth() &&        date.getUTCDate() === today.getDate()){        cls.push('today');      }      if (this.dates.contains(date) !== -1)        cls.push('active');      if (date.valueOf() < this.o.startDate || date.valueOf() > this.o.endDate ||        $.inArray(date.getUTCDay(), this.o.daysOfWeekDisabled) !== -1){        cls.push('disabled');      }      if (this.range){        if (date > this.range[0] && date < this.range[this.range.length-1]){          cls.push('range');        }        if ($.inArray(date.valueOf(), this.range) !== -1){          cls.push('selected');        }      }      return cls;    },    fill: function(){      var d = new Date(this.viewDate),        year = d.getUTCFullYear(),        month = d.getUTCMonth(),        startYear = this.o.startDate !== -Infinity ? this.o.startDate.getUTCFullYear() : -Infinity,        startMonth = this.o.startDate !== -Infinity ? this.o.startDate.getUTCMonth() : -Infinity,        endYear = this.o.endDate !== Infinity ? this.o.endDate.getUTCFullYear() : Infinity,        endMonth = this.o.endDate !== Infinity ? this.o.endDate.getUTCMonth() : Infinity,        todaytxt = dates[this.o.language].today || dates['en'].today || '',        cleartxt = dates[this.o.language].clear || dates['en'].clear || '',        tooltip;      this.picker.find('.datepicker-days thead th.datepicker-switch')            .text(dates[this.o.language].months[month]+' '+year);      this.picker.find('tfoot th.today')            .text(todaytxt)            .toggle(this.o.todayBtn !== false);      this.picker.find('tfoot th.clear')            .text(cleartxt)            .toggle(this.o.clearBtn !== false);      this.updateNavArrows();      this.fillMonths();      var prevMonth = UTCDate(year, month-1, 28),        day = DPGlobal.getDaysInMonth(prevMonth.getUTCFullYear(), prevMonth.getUTCMonth());      prevMonth.setUTCDate(day);      prevMonth.setUTCDate(day - (prevMonth.getUTCDay() - this.o.weekStart + 7)%7);      var nextMonth = new Date(prevMonth);      nextMonth.setUTCDate(nextMonth.getUTCDate() + 42);      nextMonth = nextMonth.valueOf();      var html = [];      var clsName;      while (prevMonth.valueOf() < nextMonth){        if (prevMonth.getUTCDay() === this.o.weekStart){          html.push('<tr>');          if (this.o.calendarWeeks){            // ISO 8601: First week contains first thursday.            // ISO also states week starts on Monday, but we can be more abstract here.            var              // Start of current week: based on weekstart/current date              ws = new Date(+prevMonth + (this.o.weekStart - prevMonth.getUTCDay() - 7) % 7 * 864e5),              // Thursday of this week              th = new Date(Number(ws) + (7 + 4 - ws.getUTCDay()) % 7 * 864e5),              // First Thursday of year, year from thursday              yth = new Date(Number(yth = UTCDate(th.getUTCFullYear(), 0, 1)) + (7 + 4 - yth.getUTCDay())%7*864e5),              // Calendar week: ms between thursdays, div ms per day, div 7 days              calWeek = (th - yth) / 864e5 / 7 + 1;            html.push('<td >'+ calWeek +'</td>');          }        }        clsName = this.getClassNames(prevMonth);        clsName.push('day');        if (this.o.beforeShowDay !== $.noop){          var before = this.o.beforeShowDay(this._utc_to_local(prevMonth));          if (before === undefined)            before = {};          else if (typeof(before) === 'boolean')            before = {enabled: before};          else if (typeof(before) === 'string')            before = {classes: before};          if (before.enabled === false)            clsName.push('disabled');          if (before.classes)            clsName = clsName.concat(before.classes.split(/\s+/));          if (before.tooltip)            tooltip = before.tooltip;        }        clsName = $.unique(clsName);        html.push('<td color: #800000;">'+clsName.join(' ')+'"' + (tooltip ? ' title="'+tooltip+'"' : '') + '>'+prevMonth.getUTCDate() + '</td>');        if (prevMonth.getUTCDay() === this.o.weekEnd){          html.push('</tr>');        }        prevMonth.setUTCDate(prevMonth.getUTCDate()+1);      }      this.picker.find('.datepicker-days tbody').empty().append(html.join(''));      var months = this.picker.find('.datepicker-months')            .find('th:eq(1)')              .text(year)              .end()            .find('span').removeClass('active');      $.each(this.dates, function(i, d){        if (d.getUTCFullYear() === year)          months.eq(d.getUTCMonth()).addClass('active');      });      if (year < startYear || year > endYear){        months.addClass('disabled');      }      if (year === startYear){        months.slice(0, startMonth).addClass('disabled');      }      if (year === endYear){        months.slice(endMonth+1).addClass('disabled');      }      html = '';      year = parseInt(year/10, 10) * 10;      var yearCont = this.picker.find('.datepicker-years')                .find('th:eq(1)')                  .text(year + '-' + (year + 9))                  .end()                .find('td');      year -= 1;      var years = $.map(this.dates, function(d){          return d.getUTCFullYear();        }),        classes;      for (var i = -1; i < 11; i++){        classes = ['year'];        if (i === -1)          classes.push('old');        else if (i === 10)          classes.push('new');        if ($.inArray(year, years) !== -1)          classes.push('active');        if (year < startYear || year > endYear)          classes.push('disabled');        html += '<span color: #800000;">' + classes.join(' ') + '">'+year+'</span>';        year += 1;      }      yearCont.html(html);    },    updateNavArrows: function(){      if (!this._allow_update)        return;      var d = new Date(this.viewDate),        year = d.getUTCFullYear(),        month = d.getUTCMonth();      switch (this.viewMode){        case 0:          if (this.o.startDate !== -Infinity && year <= this.o.startDate.getUTCFullYear() && month <= this.o.startDate.getUTCMonth()){            this.picker.find('.prev').css({visibility: 'hidden'});          }          else {            this.picker.find('.prev').css({visibility: 'visible'});          }          if (this.o.endDate !== Infinity && year >= this.o.endDate.getUTCFullYear() && month >= this.o.endDate.getUTCMonth()){            this.picker.find('.next').css({visibility: 'hidden'});          }          else {            this.picker.find('.next').css({visibility: 'visible'});          }          break;        case 1:        case 2:          if (this.o.startDate !== -Infinity && year <= this.o.startDate.getUTCFullYear()){            this.picker.find('.prev').css({visibility: 'hidden'});          }          else {            this.picker.find('.prev').css({visibility: 'visible'});          }          if (this.o.endDate !== Infinity && year >= this.o.endDate.getUTCFullYear()){            this.picker.find('.next').css({visibility: 'hidden'});          }          else {            this.picker.find('.next').css({visibility: 'visible'});          }          break;      }    },    click: function(e){      e.preventDefault();      var target = $(e.target).closest('span, td, th'),        year, month, day;      if (target.length === 1){        switch (target[0].nodeName.toLowerCase()){          case 'th':            switch (target[0].className){              case 'datepicker-switch':                this.showMode(1);                break;              case 'prev':              case 'next':                var dir = DPGlobal.modes[this.viewMode].navStep * (target[0].className === 'prev' ? -1 : 1);                switch (this.viewMode){                  case 0:                    this.viewDate = this.moveMonth(this.viewDate, dir);                    this._trigger('changeMonth', this.viewDate);                    break;                  case 1:                  case 2:                    this.viewDate = this.moveYear(this.viewDate, dir);                    if (this.viewMode === 1)                      this._trigger('changeYear', this.viewDate);                    break;                }                this.fill();                break;              case 'today':                var date = new Date();                date = UTCDate(date.getFullYear(), date.getMonth(), date.getDate(), 0, 0, 0);                this.showMode(-2);                var which = this.o.todayBtn === 'linked' ? null : 'view';                this._setDate(date, which);                break;              case 'clear':                var element;                if (this.isInput)                  element = this.element;                else if (this.component)                  element = this.element.find('input');                if (element)                  element.val("").change();                this.update();                this._trigger('changeDate');                if (this.o.autoclose)                  this.hide();                break;            }            break;          case 'span':            if (!target.is('.disabled')){              this.viewDate.setUTCDate(1);              if (target.is('.month')){                day = 1;                month = target.parent().find('span').index(target);                year = this.viewDate.getUTCFullYear();                this.viewDate.setUTCMonth(month);                this._trigger('changeMonth', this.viewDate);                if (this.o.minViewMode === 1){                  this._setDate(UTCDate(year, month, day));                }              }              else {                day = 1;                month = 0;                year = parseInt(target.text(), 10)||0;                this.viewDate.setUTCFullYear(year);                this._trigger('changeYear', this.viewDate);                if (this.o.minViewMode === 2){                  this._setDate(UTCDate(year, month, day));                }              }              this.showMode(-1);              this.fill();            }            break;          case 'td':            if (target.is('.day') && !target.is('.disabled')){              day = parseInt(target.text(), 10)||1;              year = this.viewDate.getUTCFullYear();              month = this.viewDate.getUTCMonth();              if (target.is('.old')){                if (month === 0){                  month = 11;                  year -= 1;                }                else {                  month -= 1;                }              }              else if (target.is('.new')){                if (month === 11){                  month = 0;                  year += 1;                }                else {                  month += 1;                }              }              this._setDate(UTCDate(year, month, day));            }            break;        }      }      if (this.picker.is(':visible') && this._focused_from){        $(this._focused_from).focus();      }      delete this._focused_from;    },    _toggle_multidate: function(date){      var ix = this.dates.contains(date);      if (!date){        this.dates.clear();      }      else if (ix !== -1){        this.dates.remove(ix);      }      else {        this.dates.push(date);      }      if (typeof this.o.multidate === 'number')        while (this.dates.length > this.o.multidate)          this.dates.remove(0);    },    _setDate: function(date, which){      if (!which || which === 'date')        this._toggle_multidate(date && new Date(date));      if (!which || which === 'view')        this.viewDate = date && new Date(date);      this.fill();      this.setValue();      this._trigger('changeDate');      var element;      if (this.isInput){        element = this.element;      }      else if (this.component){        element = this.element.find('input');      }      if (element){        element.change();      }      if (this.o.autoclose && (!which || which === 'date')){        this.hide();      }    },    moveMonth: function(date, dir){      if (!date)        return undefined;      if (!dir)        return date;      var new_date = new Date(date.valueOf()),        day = new_date.getUTCDate(),        month = new_date.getUTCMonth(),        mag = Math.abs(dir),        new_month, test;      dir = dir > 0 ? 1 : -1;      if (mag === 1){        test = dir === -1          // If going back one month, make sure month is not current month          // (eg, Mar 31 -> Feb 31 == Feb 28, not Mar 02)          ? function(){            return new_date.getUTCMonth() === month;          }          // If going forward one month, make sure month is as expected          // (eg, Jan 31 -> Feb 31 == Feb 28, not Mar 02)          : function(){            return new_date.getUTCMonth() !== new_month;          };        new_month = month + dir;        new_date.setUTCMonth(new_month);        // Dec -> Jan (12) or Jan -> Dec (-1) -- limit expected date to 0-11        if (new_month < 0 || new_month > 11)          new_month = (new_month + 12) % 12;      }      else {        // For magnitudes >1, move one month at a time...        for (var i=0; i < mag; i++)          // ...which might decrease the day (eg, Jan 31 to Feb 28, etc)...          new_date = this.moveMonth(new_date, dir);        // ...then reset the day, keeping it in the new month        new_month = new_date.getUTCMonth();        new_date.setUTCDate(day);        test = function(){          return new_month !== new_date.getUTCMonth();        };      }      // Common date-resetting loop -- if date is beyond end of month, make it      // end of month      while (test()){        new_date.setUTCDate(--day);        new_date.setUTCMonth(new_month);      }      return new_date;    },    moveYear: function(date, dir){      return this.moveMonth(date, dir*12);    },    dateWithinRange: function(date){      return date >= this.o.startDate && date <= this.o.endDate;    },    keydown: function(e){      if (this.picker.is(':not(:visible)')){        if (e.keyCode === 27) // allow escape to hide and re-show picker          this.show();        return;      }      var dateChanged = false,        dir, newDate, newViewDate,        focusDate = this.focusDate || this.viewDate;      switch (e.keyCode){        case 27: // escape          if (this.focusDate){            this.focusDate = null;            this.viewDate = this.dates.get(-1) || this.viewDate;            this.fill();          }          else            this.hide();          e.preventDefault();          break;        case 37: // left        case 39: // right          if (!this.o.keyboardNavigation)            break;          dir = e.keyCode === 37 ? -1 : 1;          if (e.ctrlKey){            newDate = this.moveYear(this.dates.get(-1) || UTCToday(), dir);            newViewDate = this.moveYear(focusDate, dir);            this._trigger('changeYear', this.viewDate);          }          else if (e.shiftKey){            newDate = this.moveMonth(this.dates.get(-1) || UTCToday(), dir);            newViewDate = this.moveMonth(focusDate, dir);            this._trigger('changeMonth', this.viewDate);          }          else {            newDate = new Date(this.dates.get(-1) || UTCToday());            newDate.setUTCDate(newDate.getUTCDate() + dir);            newViewDate = new Date(focusDate);            newViewDate.setUTCDate(focusDate.getUTCDate() + dir);          }          if (this.dateWithinRange(newDate)){            this.focusDate = this.viewDate = newViewDate;            this.setValue();            this.fill();            e.preventDefault();          }          break;        case 38: // up        case 40: // down          if (!this.o.keyboardNavigation)            break;          dir = e.keyCode === 38 ? -1 : 1;          if (e.ctrlKey){            newDate = this.moveYear(this.dates.get(-1) || UTCToday(), dir);            newViewDate = this.moveYear(focusDate, dir);            this._trigger('changeYear', this.viewDate);          }          else if (e.shiftKey){            newDate = this.moveMonth(this.dates.get(-1) || UTCToday(), dir);            newViewDate = this.moveMonth(focusDate, dir);            this._trigger('changeMonth', this.viewDate);          }          else {            newDate = new Date(this.dates.get(-1) || UTCToday());            newDate.setUTCDate(newDate.getUTCDate() + dir * 7);            newViewDate = new Date(focusDate);            newViewDate.setUTCDate(focusDate.getUTCDate() + dir * 7);          }          if (this.dateWithinRange(newDate)){            this.focusDate = this.viewDate = newViewDate;            this.setValue();            this.fill();            e.preventDefault();          }          break;        case 32: // spacebar          // Spacebar is used in manually typing dates in some formats.          // As such, its behavior should not be hijacked.          break;        case 13: // enter          focusDate = this.focusDate || this.dates.get(-1) || this.viewDate;          this._toggle_multidate(focusDate);          dateChanged = true;          this.focusDate = null;          this.viewDate = this.dates.get(-1) || this.viewDate;          this.setValue();          this.fill();          if (this.picker.is(':visible')){            e.preventDefault();            if (this.o.autoclose)              this.hide();          }          break;        case 9: // tab          this.focusDate = null;          this.viewDate = this.dates.get(-1) || this.viewDate;          this.fill();          this.hide();          break;      }      if (dateChanged){        if (this.dates.length)          this._trigger('changeDate');        else          this._trigger('clearDate');        var element;        if (this.isInput){          element = this.element;        }        else if (this.component){          element = this.element.find('input');        }        if (element){          element.change();        }      }    },    showMode: function(dir){      if (dir){        this.viewMode = Math.max(this.o.minViewMode, Math.min(2, this.viewMode + dir));      }      this.picker        .find('>div')        .hide()        .filter('.datepicker-'+DPGlobal.modes[this.viewMode].clsName)          .css('display', 'block');      this.updateNavArrows();    }  };  var DateRangePicker = function(element, options){    this.element = $(element);    this.inputs = $.map(options.inputs, function(i){      return i.jquery ? i[0] : i;    });    delete options.inputs;    $(this.inputs)      .datepicker(options)      .bind('changeDate', $.proxy(this.dateUpdated, this));    this.pickers = $.map(this.inputs, function(i){      return $(i).data('datepicker');    });    this.updateDates();  };  DateRangePicker.prototype = {    updateDates: function(){      this.dates = $.map(this.pickers, function(i){        return i.getUTCDate();      });      this.updateRanges();    },    updateRanges: function(){      var range = $.map(this.dates, function(d){        return d.valueOf();      });      $.each(this.pickers, function(i, p){        p.setRange(range);      });    },    dateUpdated: function(e){      // `this.updating` is a workaround for preventing infinite recursion      // between `changeDate` triggering and `setUTCDate` calling. Until      // there is a better mechanism.      if (this.updating)        return;      this.updating = true;      var dp = $(e.target).data('datepicker'),        new_date = dp.getUTCDate(),        i = $.inArray(e.target, this.inputs),        l = this.inputs.length;      if (i === -1)        return;      $.each(this.pickers, function(i, p){        if (!p.getUTCDate())          p.setUTCDate(new_date);      });      if (new_date < this.dates[i]){        // Date being moved earlier/left        while (i >= 0 && new_date < this.dates[i]){          this.pickers[i--].setUTCDate(new_date);        }      }      else if (new_date > this.dates[i]){        // Date being moved later/right        while (i < l && new_date > this.dates[i]){          this.pickers[i++].setUTCDate(new_date);        }      }      this.updateDates();      delete this.updating;    },    remove: function(){      $.map(this.pickers, function(p){ p.remove(); });      delete this.element.data().datepicker;    }  };  function opts_from_el(el, prefix){    // Derive options from element data-attrs    var data = $(el).data(),      out = {}, inkey,      replace = new RegExp('^' + prefix.toLowerCase() + '([A-Z])');    prefix = new RegExp('^' + prefix.toLowerCase());    function re_lower(_,a){      return a.toLowerCase();    }    for (var key in data)      if (prefix.test(key)){        inkey = key.replace(replace, re_lower);        out[inkey] = data[key];      }    return out;  }  function opts_from_locale(lang){    // Derive options from locale plugins    var out = {};    // Check if "de-DE" style date is available, if not language should    // fallback to 2 letter code eg "de"    if (!dates[lang]){      lang = lang.split('-')[0];      if (!dates[lang])        return;    }    var d = dates[lang];    $.each(locale_opts, function(i,k){      if (k in d)        out[k] = d[k];    });    return out;  }  var old = $.fn.datepicker;  $.fn.datepicker = function(option){    var args = Array.apply(null, arguments);    args.shift();    var internal_return;    this.each(function(){      var $this = $(this),        data = $this.data('datepicker'),        options = typeof option === 'object' && option;      if (!data){        var elopts = opts_from_el(this, 'date'),          // Preliminary otions          xopts = $.extend({}, defaults, elopts, options),          locopts = opts_from_locale(xopts.language),          // Options priority: js args, data-attrs, locales, defaults          opts = $.extend({}, defaults, locopts, elopts, options);        if ($this.is('.input-daterange') || opts.inputs){          var ropts = {            inputs: opts.inputs || $this.find('input').toArray()          };          $this.data('datepicker', (data = new DateRangePicker(this, $.extend(opts, ropts))));        }        else {          $this.data('datepicker', (data = new Datepicker(this, opts)));        }      }      if (typeof option === 'string' && typeof data[option] === 'function'){        internal_return = data[option].apply(data, args);        if (internal_return !== undefined)          return false;      }    });    if (internal_return !== undefined)      return internal_return;    else      return this;  };  var defaults = $.fn.datepicker.defaults = {    autoclose: false,    beforeShowDay: $.noop,    calendarWeeks: false,    clearBtn: false,    daysOfWeekDisabled: [],    endDate: Infinity,    forceParse: true,    format: 'mm/dd/yyyy',    keyboardNavigation: true,    language: 'en',    minViewMode: 0,    multidate: false,    multidateSeparator: ',',    orientation: "auto",    rtl: false,    startDate: -Infinity,    startView: 0,    todayBtn: false,    todayHighlight: false,    weekStart: 0  };  var locale_opts = $.fn.datepicker.locale_opts = [    'format',    'rtl',    'weekStart'  ];  $.fn.datepicker.Constructor = Datepicker;  var dates = $.fn.datepicker.dates = {    en: {      days: ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"],      daysShort: ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"],      daysMin: ["Su", "Mo", "Tu", "We", "Th", "Fr", "Sa", "Su"],      months: ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"],      monthsShort: ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"],      today: "Today",      clear: "Clear"    }  };  var DPGlobal = {    modes: [      {        clsName: 'days',        navFnc: 'Month',        navStep: 1      },      {        clsName: 'months',        navFnc: 'FullYear',        navStep: 1      },      {        clsName: 'years',        navFnc: 'FullYear',        navStep: 10    }],    isLeapYear: function(year){      return (((year % 4 === 0) && (year % 100 !== 0)) || (year % 400 === 0));    },    getDaysInMonth: function(year, month){      return [31, (DPGlobal.isLeapYear(year) ? 29 : 28), 31, 30, 31, 30, 31, 31, 30, 31, 30, 31][month];    },    validParts: /dd?|DD?|mm?|MM?|yy(?:yy)?/g,    nonpunctuation: /[^ -\/:-@\[\u3400-\u9fff-`{-~\t\n\r]+/g,    parseFormat: function(format){      // IE treats \0 as a string end in inputs (truncating the value),      // so it's a bad format delimiter, anyway      var separators = format.replace(this.validParts, '\0').split('\0'),        parts = format.match(this.validParts);      if (!separators || !separators.length || !parts || parts.length === 0){        throw new Error("Invalid date format.");      }      return {separators: separators, parts: parts};    },    parseDate: function(date, format, language){      if (!date)        return undefined;      if (date instanceof Date)        return date;      if (typeof format === 'string')        format = DPGlobal.parseFormat(format);      var part_re = /([\-+]\d+)([dmwy])/,        parts = date.match(/([\-+]\d+)([dmwy])/g),        part, dir, i;      if (/^[\-+]\d+[dmwy]([\s,]+[\-+]\d+[dmwy])*$/.test(date)){        date = new Date();        for (i=0; i < parts.length; i++){          part = part_re.exec(parts[i]);          dir = parseInt(part[1]);          switch (part[2]){            case 'd':              date.setUTCDate(date.getUTCDate() + dir);              break;            case 'm':              date = Datepicker.prototype.moveMonth.call(Datepicker.prototype, date, dir);              break;            case 'w':              date.setUTCDate(date.getUTCDate() + dir * 7);              break;            case 'y':              date = Datepicker.prototype.moveYear.call(Datepicker.prototype, date, dir);              break;          }        }        return UTCDate(date.getUTCFullYear(), date.getUTCMonth(), date.getUTCDate(), 0, 0, 0);      }      parts = date && date.match(this.nonpunctuation) || [];      date = new Date();      var parsed = {},        setters_order = ['yyyy', 'yy', 'M', 'MM', 'm', 'mm', 'd', 'dd'],        setters_map = {          yyyy: function(d,v){            return d.setUTCFullYear(v);          },          yy: function(d,v){            return d.setUTCFullYear(2000+v);          },          m: function(d,v){            if (isNaN(d))              return d;            v -= 1;            while (v < 0) v += 12;            v %= 12;            d.setUTCMonth(v);            while (d.getUTCMonth() !== v)              d.setUTCDate(d.getUTCDate()-1);            return d;          },          d: function(d,v){            return d.setUTCDate(v);          }        },        val, filtered;      setters_map['M'] = setters_map['MM'] = setters_map['mm'] = setters_map['m'];      setters_map['dd'] = setters_map['d'];      date = UTCDate(date.getFullYear(), date.getMonth(), date.getDate(), 0, 0, 0);      var fparts = format.parts.slice();      // Remove noop parts      if (parts.length !== fparts.length){        fparts = $(fparts).filter(function(i,p){          return $.inArray(p, setters_order) !== -1;        }).toArray();      }      // Process remainder      function match_part(){        var m = this.slice(0, parts[i].length),          p = parts[i].slice(0, m.length);        return m === p;      }      if (parts.length === fparts.length){        var cnt;        for (i=0, cnt = fparts.length; i < cnt; i++){          val = parseInt(parts[i], 10);          part = fparts[i];          if (isNaN(val)){            switch (part){              case 'MM':                filtered = $(dates[language].months).filter(match_part);                val = $.inArray(filtered[0], dates[language].months) + 1;                break;              case 'M':                filtered = $(dates[language].monthsShort).filter(match_part);                val = $.inArray(filtered[0], dates[language].monthsShort) + 1;                break;            }          }          parsed[part] = val;        }        var _date, s;        for (i=0; i < setters_order.length; i++){          s = setters_order[i];          if (s in parsed && !isNaN(parsed[s])){            _date = new Date(date);            setters_map[s](_date, parsed[s]);            if (!isNaN(_date))              date = _date;          }        }      }      return date;    },    formatDate: function(date, format, language){      if (!date)        return '';      if (typeof format === 'string')        format = DPGlobal.parseFormat(format);      var val = {        d: date.getUTCDate(),        D: dates[language].daysShort[date.getUTCDay()],        DD: dates[language].days[date.getUTCDay()],        m: date.getUTCMonth() + 1,        M: dates[language].monthsShort[date.getUTCMonth()],        MM: dates[language].months[date.getUTCMonth()],        yy: date.getUTCFullYear().toString().substring(2),        yyyy: date.getUTCFullYear()      };      val.dd = (val.d < 10 ? '0' : '') + val.d;      val.mm = (val.m < 10 ? '0' : '') + val.m;      date = [];      var seps = $.extend([], format.separators);      for (var i=0, cnt = format.parts.length; i <= cnt; i++){        if (seps.length)          date.push(seps.shift());        date.push(val[format.parts[i]]);      }      return date.join('');    },    headTemplate: '<thead>'+              '<tr>'+                '<th >&laquo;</th>'+                '<th colspan="5" ></th>'+                '<th >&raquo;</th>'+              '</tr>'+            '</thead>',    contTemplate: '<tbody><tr><td colspan="7"></td></tr></tbody>',    footTemplate: '<tfoot>'+              '<tr>'+                '<th colspan="7" ></th>'+              '</tr>'+              '<tr>'+                '<th colspan="7" ></th>'+              '</tr>'+            '</tfoot>'  };  DPGlobal.template = '<div >'+              '<div >'+                '<table >'+                  DPGlobal.headTemplate+                  '<tbody></tbody>'+                  DPGlobal.footTemplate+                '</table>'+              '</div>'+              '<div >'+                '<table >'+                  DPGlobal.headTemplate+                  DPGlobal.contTemplate+                  DPGlobal.footTemplate+                '</table>'+              '</div>'+              '<div >'+                '<table >'+                  DPGlobal.headTemplate+                  DPGlobal.contTemplate+                  DPGlobal.footTemplate+                '</table>'+              '</div>'+            '</div>';  $.fn.datepicker.DPGlobal = DPGlobal;  /* DATEPICKER NO CONFLICT  * =================== */  $.fn.datepicker.noConflict = function(){    $.fn.datepicker = old;    return this;  };  /* DATEPICKER DATA-API  * ================== */  $(document).on(    'focus.datepicker.data-api click.datepicker.data-api',    '[data-provide="datepicker"]',    function(e){      var $this = $(this);      if ($this.data('datepicker'))        return;      e.preventDefault();      // component click requires us to explicitly show it      $this.datepicker('show');    }  );  $(function(){    $('[data-provide="datepicker-inline"]').datepicker();  });}(window.jQuery));

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 总结:使用了标准清理模式,每次操作之后,工作单元对象都被销毁了,再次进行其他操作的时候,又会重新创建对象的实例。