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[ASP.net教程]23、ASP.NET MVC入门到精通——业务层和数据层父类及接口


本系列目录:ASP.NET MVC4入门到精通系列目录汇总

在上一篇中,我们已经把项目的基本框架搭起来了,这一篇我们就来实现业务层和数据层的父接口及父类。

1、我们先来定义一个业务层父接口IBaseBLL.cs

using System;using System.Collections.Generic;using System.Linq;using System.Linq.Expressions;using System.Text;using System.Threading.Tasks;namespace IBLL{  /// <summary>  /// 业务父 接口  /// </summary>  /// <typeparam name="T"></typeparam>  public interface IBaseBLL<T> where T:class,new()  {    //定义 增删改查 方法    #region 1.0 新增 实体 +int Add(T model)    /// <summary>    /// 新增 实体    /// </summary>    /// <param name="model"></param>    /// <returns></returns>    int Add(T model);    #endregion    #region 2.0 根据 id 删除 +int Del(T model)    /// <summary>    /// 根据 id 删除    /// </summary>    /// <param name="model">包含要删除id的对象</param>    /// <returns></returns>    int Del(T model);    #endregion    #region 3.0 根据条件删除 +int DelBy(Expression<Func<T, bool>> delWhere)    /// <summary>    /// 3.0 根据条件删除    /// </summary>    /// <param name="delWhere"></param>    /// <returns></returns>    int DelBy(Expression<Func<T, bool>> delWhere);    #endregion    #region 4.0 修改 +int Modify(T model, params string[] proNames)    /// <summary>    /// 4.0 修改,如:    /// T u = new T() { uId = 1, uLoginName = "asdfasdf" };    /// this.Modify(u, "uLoginName");    /// </summary>    /// <param name="model">要修改的实体对象</param>    /// <param name="proNames">要修改的 属性 名称</param>    /// <returns></returns>    int Modify(T model, params string[] proNames);    #endregion    #region 4.0 批量修改 +int Modify(T model, Expression<Func<T, bool>> whereLambda, params string[] modifiedProNames)    /// <summary>    /// 4.0 批量修改    /// </summary>    /// <param name="model">要修改的实体对象</param>    /// <param name="whereLambda">查询条件</param>    /// <param name="proNames">要修改的 属性 名称</param>    /// <returns></returns>    int ModifyBy(T model, Expression<Func<T, bool>> whereLambda, params string[] modifiedProNames);    #endregion    #region 5.0 根据条件查询 +List<T> GetListBy(Expression<Func<T,bool>> whereLambda)    /// <summary>    /// 5.0 根据条件查询 +List<T> GetListBy(Expression<Func<T,bool>> whereLambda)    /// </summary>    /// <param name="whereLambda"></param>    /// <returns></returns>    List<T> GetListBy(Expression<Func<T, bool>> whereLambda);    #endregion    #region 5.1 根据条件 排序 和查询 + List<T> GetListBy<TKey>    /// <summary>    /// 5.1 根据条件 排序 和查询    /// </summary>    /// <typeparam name="TKey">排序字段类型</typeparam>    /// <param name="whereLambda">查询条件 lambda表达式</param>    /// <param name="orderLambda">排序条件 lambda表达式</param>    /// <returns></returns>    List<T> GetListBy<TKey>(Expression<Func<T, bool>> whereLambda, Expression<Func<T, TKey>> orderLambda);    #endregion    #region 6.0 分页查询 + List<T> GetPagedList<TKey>    /// <summary>    /// 6.0 分页查询 + List<T> GetPagedList<TKey>    /// </summary>    /// <param name="pageIndex">页码</param>    /// <param name="pageSize">页容量</param>    /// <param name="whereLambda">条件 lambda表达式</param>    /// <param name="orderBy">排序 lambda表达式</param>    /// <returns></returns>    List<T> GetPagedList<TKey>(int pageIndex, int pageSize, Expression<Func<T, bool>> whereLambda, Expression<Func<T, TKey>> orderBy);    #endregion  }}

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2、定义一个数据层父接口IBaseDAL.cs

using System;using System.Collections.Generic;using System.Linq;using System.Linq.Expressions;using System.Text;using System.Threading.Tasks;namespace IDAL{  /// <summary>  /// 数据层父接口  /// </summary>  public interface IBaseDAL<T> where T:class ,new()  {    //定义增删改查方法    #region 1.0 新增 实体 +int Add(T model)    /// <summary>    /// 新增 实体    /// </summary>    /// <param name="model"></param>    /// <returns></returns>    int Add(T model);    #endregion    #region 2.0 根据 id 删除 +int Del(T model)    /// <summary>    /// 根据 id 删除    /// </summary>    /// <param name="model">包含要删除id的对象</param>    /// <returns></returns>    int Del(T model);    #endregion    #region 3.0 根据条件删除 +int DelBy(Expression<Func<T, bool>> delWhere)    /// <summary>    /// 3.0 根据条件删除    /// </summary>    /// <param name="delWhere"></param>    /// <returns></returns>    int DelBy(Expression<Func<T, bool>> delWhere);    #endregion    #region 4.0 修改 +int Modify(T model, params string[] proNames)    /// <summary>    /// 4.0 修改,如:    /// T u = new T() { uId = 1, uLoginName = "asdfasdf" };    /// this.Modify(u, "uLoginName");    /// </summary>    /// <param name="model">要修改的实体对象</param>    /// <param name="proNames">要修改的 属性 名称</param>    /// <returns></returns>    int Modify(T model, params string[] proNames);    #endregion    #region 4.0 批量修改 +int Modify(T model, Expression<Func<T, bool>> whereLambda, params string[] modifiedProNames)    /// <summary>    /// 4.0 批量修改    /// </summary>    /// <param name="model">要修改的实体对象</param>    /// <param name="whereLambda">查询条件</param>    /// <param name="proNames">要修改的 属性 名称</param>    /// <returns></returns>    int ModifyBy(T model, Expression<Func<T, bool>> whereLambda, params string[] modifiedProNames);    #endregion    #region 5.0 根据条件查询 +List<T> GetListBy(Expression<Func<T,bool>> whereLambda)    /// <summary>    /// 5.0 根据条件查询 +List<T> GetListBy(Expression<Func<T,bool>> whereLambda)    /// </summary>    /// <param name="whereLambda"></param>    /// <returns></returns>    List<T> GetListBy(Expression<Func<T, bool>> whereLambda);    #endregion    #region 5.1 根据条件 排序 和查询 + List<T> GetListBy<TKey>    /// <summary>    /// 5.1 根据条件 排序 和查询    /// </summary>    /// <typeparam name="TKey">排序字段类型</typeparam>    /// <param name="whereLambda">查询条件 lambda表达式</param>    /// <param name="orderLambda">排序条件 lambda表达式</param>    /// <returns></returns>    List<T> GetListBy<TKey>(Expression<Func<T, bool>> whereLambda, Expression<Func<T, TKey>> orderLambda);    #endregion    #region 6.0 分页查询 + List<T> GetPagedList<TKey>    /// <summary>    /// 6.0 分页查询 + List<T> GetPagedList<TKey>    /// </summary>    /// <param name="pageIndex">页码</param>    /// <param name="pageSize">页容量</param>    /// <param name="whereLambda">条件 lambda表达式</param>    /// <param name="orderBy">排序 lambda表达式</param>    /// <returns></returns>    List<T> GetPagedList<TKey>(int pageIndex, int pageSize, Expression<Func<T, bool>> whereLambda, Expression<Func<T, TKey>> orderBy);    #endregion  }}

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3、我们数据库中有许多的表,通常每一张表都对应一个业务实体,如果我们每一个业务实体类都自己去手写的话,太浪费时间了,我们可以使用T4模板,简化这些枯燥的操作,提高我们的开发效率。

新建一个文本模板

然后把以下代码复制上去,

<#@ template language="C#" debug="false" hostspecific="true"#><#@ include file="EF.Utility.CS.ttinclude"#><#@ output extension=".cs"#> <#CodeGenerationTools code = new CodeGenerationTools(this);MetadataLoader loader = new MetadataLoader(this);CodeRegion region = new CodeRegion(this, 1);MetadataTools ef = new MetadataTools(this);string inputFile = @"..\MODEL\OA.edmx";EdmItemCollection ItemCollection = loader.CreateEdmItemCollection(inputFile);string namespaceName = code.VsNamespaceSuggestion();EntityFrameworkTemplateFileManager fileManager = EntityFrameworkTemplateFileManager.Create(this);#>using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace IBLL{<#// Emit Entity Typesforeach (EntityType entity in ItemCollection.GetItems<EntityType>().OrderBy(e => e.Name)){  //fileManager.StartNewFile(entity.Name + "RepositoryExt.cs");  //BeginNamespace(namespaceName, code);  #>  public partial interface I<#=entity.Name#>BLL : IBaseBLL<Model.<#=entity.Name#>>  {  }<#}#>}

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按Ctrl+S自动生成代码,自动生成的IBLL.cs如下:

 using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace IBLL{  public partial interface IBill_LeaveBLL : IBaseBLL<Model.Bill_Leave>  {  }  public partial interface IoldWF_AutoTransactNodeBLL : IBaseBLL<Model.oldWF_AutoTransactNode>  {  }  public partial interface IoldWF_BillFlowNodeBLL : IBaseBLL<Model.oldWF_BillFlowNode>  {  }  public partial interface IoldWF_BillFlowNodeRemarkBLL : IBaseBLL<Model.oldWF_BillFlowNodeRemark>  {  }  public partial interface IoldWF_BillStateBLL : IBaseBLL<Model.oldWF_BillState>  {  }  public partial interface IoldWF_NodeBLL : IBaseBLL<Model.oldWF_Node>  {  }  public partial interface IoldWF_NodeStateBLL : IBaseBLL<Model.oldWF_NodeState>  {  }  public partial interface IoldWF_WorkFlowBLL : IBaseBLL<Model.oldWF_WorkFlow>  {  }  public partial interface IoldWF_WorkFlowNodeBLL : IBaseBLL<Model.oldWF_WorkFlowNode>  {  }  public partial interface IOu_DepartmentBLL : IBaseBLL<Model.Ou_Department>  {  }  public partial interface IOu_PermissionBLL : IBaseBLL<Model.Ou_Permission>  {  }  public partial interface IOu_RoleBLL : IBaseBLL<Model.Ou_Role>  {  }  public partial interface IOu_RolePermissionBLL : IBaseBLL<Model.Ou_RolePermission>  {  }  public partial interface IOu_UserInfoBLL : IBaseBLL<Model.Ou_UserInfo>  {  }  public partial interface IOu_UserRoleBLL : IBaseBLL<Model.Ou_UserRole>  {  }  public partial interface IOu_UserVipPermissionBLL : IBaseBLL<Model.Ou_UserVipPermission>  {  }  public partial interface IW_WorkFlowBLL : IBaseBLL<Model.W_WorkFlow>  {  }  public partial interface IW_WorkFlowBranchBLL : IBaseBLL<Model.W_WorkFlowBranch>  {  }  public partial interface IW_WorkFlowNodeBLL : IBaseBLL<Model.W_WorkFlowNode>  {  }  public partial interface IW_WrokFlowRoleBLL : IBaseBLL<Model.W_WrokFlowRole>  {  }  public partial interface IWR_WorkFlowApplyBLL : IBaseBLL<Model.WR_WorkFlowApply>  {  }  public partial interface IWR_WrokFlowApplyDetailsBLL : IBaseBLL<Model.WR_WrokFlowApplyDetails>  {  }}

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4、把IBLL.tt拷贝到IDAL项目下,然后修改命名空间为IDAL,修改接口声明模板

namespace IDALpublic partial interface I<#=entity.Name#>DAL : IBaseDAL<Model.<#=entity.Name#>>

按Ctrl+S自动生成代码,自动生成的IDAL.cs如下:

 using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace IDAL{  public partial interface IBill_LeaveDAL : IBaseDAL<Model.Bill_Leave>  {  }  public partial interface IoldWF_AutoTransactNodeDAL : IBaseDAL<Model.oldWF_AutoTransactNode>  {  }  public partial interface IoldWF_BillFlowNodeDAL : IBaseDAL<Model.oldWF_BillFlowNode>  {  }  public partial interface IoldWF_BillFlowNodeRemarkDAL : IBaseDAL<Model.oldWF_BillFlowNodeRemark>  {  }  public partial interface IoldWF_BillStateDAL : IBaseDAL<Model.oldWF_BillState>  {  }  public partial interface IoldWF_NodeDAL : IBaseDAL<Model.oldWF_Node>  {  }  public partial interface IoldWF_NodeStateDAL : IBaseDAL<Model.oldWF_NodeState>  {  }  public partial interface IoldWF_WorkFlowDAL : IBaseDAL<Model.oldWF_WorkFlow>  {  }  public partial interface IoldWF_WorkFlowNodeDAL : IBaseDAL<Model.oldWF_WorkFlowNode>  {  }  public partial interface IOu_DepartmentDAL : IBaseDAL<Model.Ou_Department>  {  }  public partial interface IOu_PermissionDAL : IBaseDAL<Model.Ou_Permission>  {  }  public partial interface IOu_RoleDAL : IBaseDAL<Model.Ou_Role>  {  }  public partial interface IOu_RolePermissionDAL : IBaseDAL<Model.Ou_RolePermission>  {  }  public partial interface IOu_UserInfoDAL : IBaseDAL<Model.Ou_UserInfo>  {  }  public partial interface IOu_UserRoleDAL : IBaseDAL<Model.Ou_UserRole>  {  }  public partial interface IOu_UserVipPermissionDAL : IBaseDAL<Model.Ou_UserVipPermission>  {  }  public partial interface IW_WorkFlowDAL : IBaseDAL<Model.W_WorkFlow>  {  }  public partial interface IW_WorkFlowBranchDAL : IBaseDAL<Model.W_WorkFlowBranch>  {  }  public partial interface IW_WorkFlowNodeDAL : IBaseDAL<Model.W_WorkFlowNode>  {  }  public partial interface IW_WrokFlowRoleDAL : IBaseDAL<Model.W_WrokFlowRole>  {  }  public partial interface IWR_WorkFlowApplyDAL : IBaseDAL<Model.WR_WorkFlowApply>  {  }  public partial interface IWR_WrokFlowApplyDetailsDAL : IBaseDAL<Model.WR_WrokFlowApplyDetails>  {  }}

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注意,我这里生成的所有接口都是partial类型的,这样我以后可以很方便的进行扩展

关于T4模板的使用不在本篇所讲的范畴,有兴趣的朋友,可以查找相关资料学习,我这里只做简要说明。

<#@ include file="EF.Utility.CS.ttinclude"#>:引入微软的生成框架

<#@ output extension=".cs"#>:指定生成的文件类型为.cs文件

string inputFile = @"..\MODEL\OA.edmx":这里使用相对路径指向我们新建的ADO.NET实体数据模型文件。

5、添加数据层的父类BaseDAL.cs

前面数据层接口和业务层接口都已经添加好了,那么现在来添加数据层类和业务层类

在DAL项目中添加EntityFramework.dll和System.Data.Entity.dll的引用

using System;using System.Collections.Generic;using System.Data.Entity;using System.Data.Entity.Infrastructure;using System.Linq;using System.Linq.Expressions;using System.Reflection;using System.Text;using Model;namespace DAL{  /// <summary>  /// 数据层 父类  /// </summary>  /// <typeparam name="T"></typeparam>  public class BaseDAL<T> : IDAL.IBaseDAL<T> where T : class,new()  {    /// <summary>    /// EF上下文对象    /// </summary>    DbContext db = new OAEntities(); //new DBContextFactory().GetDbContext();//     #region 1.0 新增 实体 +int Add(T model)    /// <summary>    /// 新增 实体    /// </summary>    /// <param name="model"></param>    /// <returns></returns>    public int Add(T model)    {      db.Set<T>().Add(model);      return db.SaveChanges();//保存成功后,会将自增的id设置给 model的 主键属性,并返回受影响行数    }    #endregion    #region 2.0 根据 id 删除 +int Del(T model)    /// <summary>    /// 根据 id 删除    /// </summary>    /// <param name="model">包含要删除id的对象</param>    /// <returns></returns>    public int Del(T model)    {      db.Set<T>().Attach(model);      db.Set<T>().Remove(model);      return db.SaveChanges();    }    #endregion    #region 3.0 根据条件删除 +int DelBy(Expression<Func<T, bool>> delWhere)    /// <summary>    /// 3.0 根据条件删除    /// </summary>    /// <param name="delWhere"></param>    /// <returns></returns>    public int DelBy(Expression<Func<T, bool>> delWhere)    {      //3.1查询要删除的数据      List<T> listDeleting = db.Set<T>().Where(delWhere).ToList();      //3.2将要删除的数据 用删除方法添加到 EF 容器中      listDeleting.ForEach(u =>      {        db.Set<T>().Attach(u);//先附加到 EF容器        db.Set<T>().Remove(u);//标识为 删除 状态      });      //3.3一次性 生成sql语句到数据库执行删除      return db.SaveChanges();    }    #endregion    #region 4.0 修改 +int Modify(T model, params string[] proNames)    /// <summary>    /// 4.0 修改,如:    /// T u = new T() { uId = 1, uLoginName = "asdfasdf" };    /// this.Modify(u, "uLoginName");    /// </summary>    /// <param name="model">要修改的实体对象</param>    /// <param name="proNames">要修改的 属性 名称</param>    /// <returns></returns>    public int Modify(T model, params string[] proNames)    {      //4.1将 对象 添加到 EF中      DbEntityEntry entry = db.Entry<T>(model);      //4.2先设置 对象的包装 状态为 Unchanged      entry.State = System.Data.EntityState.Unchanged;      //4.3循环 被修改的属性名 数组      foreach (string proName in proNames)      {        //4.4将每个 被修改的属性的状态 设置为已修改状态;后面生成update语句时,就只为已修改的属性 更新        entry.Property(proName).IsModified = true;      }      //4.4一次性 生成sql语句到数据库执行      return db.SaveChanges();    }    #endregion    #region 4.0 批量修改 +int Modify(T model, Expression<Func<T, bool>> whereLambda, params string[] modifiedProNames)    /// <summary>    /// 4.0 批量修改    /// </summary>    /// <param name="model">要修改的实体对象</param>    /// <param name="whereLambda">查询条件</param>    /// <param name="proNames">要修改的 属性 名称</param>    /// <returns></returns>    public int ModifyBy(T model, Expression<Func<T, bool>> whereLambda, params string[] modifiedProNames)    {      //4.1查询要修改的数据      List<T> listModifing = db.Set<T>().Where(whereLambda).ToList();      //获取 实体类 类型对象      Type t = typeof(T); // model.GetType();      //获取 实体类 所有的 公有属性      List<PropertyInfo> proInfos = t.GetProperties(BindingFlags.Instance | BindingFlags.Public).ToList();      //创建 实体属性 字典集合      Dictionary<string, PropertyInfo> dictPros = new Dictionary<string, PropertyInfo>();      //将 实体属性 中要修改的属性名 添加到 字典集合中 键:属性名 值:属性对象      proInfos.ForEach(p =>      {        if (modifiedProNames.Contains(p.Name))        {          dictPros.Add(p.Name, p);        }      });      //4.3循环 要修改的属性名      foreach (string proName in modifiedProNames)      {        //判断 要修改的属性名是否在 实体类的属性集合中存在        if (dictPros.ContainsKey(proName))        {          //如果存在,则取出要修改的 属性对象          PropertyInfo proInfo = dictPros[proName];          //取出 要修改的值          object newValue = proInfo.GetValue(model, null); //object newValue = model.uName;          //4.4批量设置 要修改 对象的 属性          foreach (T usrO in listModifing)          {            //为 要修改的对象 的 要修改的属性 设置新的值            proInfo.SetValue(usrO, newValue, null); //usrO.uName = newValue;          }        }      }      //4.4一次性 生成sql语句到数据库执行      return db.SaveChanges();    }    #endregion    #region 5.0 根据条件查询 +List<T> GetListBy(Expression<Func<T,bool>> whereLambda)    /// <summary>    /// 5.0 根据条件查询 +List<T> GetListBy(Expression<Func<T,bool>> whereLambda)    /// </summary>    /// <param name="whereLambda"></param>    /// <returns></returns>    public List<T> GetListBy(Expression<Func<T, bool>> whereLambda)    {      return db.Set<T>().Where(whereLambda).ToList();    }    #endregion    #region 5.1 根据条件 排序 和查询 + List<T> GetListBy<TKey>    /// <summary>    /// 5.1 根据条件 排序 和查询    /// </summary>    /// <typeparam name="TKey">排序字段类型</typeparam>    /// <param name="whereLambda">查询条件 lambda表达式</param>    /// <param name="orderLambda">排序条件 lambda表达式</param>    /// <returns></returns>    public List<T> GetListBy<TKey>(Expression<Func<T, bool>> whereLambda, Expression<Func<T, TKey>> orderLambda)    {      return db.Set<T>().Where(whereLambda).OrderBy(orderLambda).ToList();    }    #endregion    #region 6.0 分页查询 + List<T> GetPagedList<TKey>    /// <summary>    /// 6.0 分页查询 + List<T> GetPagedList<TKey>    /// </summary>    /// <param name="pageIndex">页码</param>    /// <param name="pageSize">页容量</param>    /// <param name="whereLambda">条件 lambda表达式</param>    /// <param name="orderBy">排序 lambda表达式</param>    /// <returns></returns>    public List<T> GetPagedList<TKey>(int pageIndex, int pageSize, Expression<Func<T, bool>> whereLambda, Expression<Func<T, TKey>> orderBy)    {      // 分页 一定注意: Skip 之前一定要 OrderBy      return db.Set<T>().Where(whereLambda).OrderBy(orderBy).Skip((pageIndex - 1) * pageSize).Take(pageSize).ToList();    }    #endregion  }}

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 6、拷贝IDAL.tt到DAL项目中,改名为DAL.tt,然后修改T4模板

按Ctrl+S自动生成代码,自动生成的DAL.cs如下:

 using System;using System.Collections.Generic;using System.Linq;using System.Text;using IDAL;namespace DAL{  public partial class Bill_LeaveDAL : BaseDAL<Model.Bill_Leave>,IBill_LeaveDAL  {  }  public partial class oldWF_AutoTransactNodeDAL : BaseDAL<Model.oldWF_AutoTransactNode>,IoldWF_AutoTransactNodeDAL  {  }  public partial class oldWF_BillFlowNodeDAL : BaseDAL<Model.oldWF_BillFlowNode>,IoldWF_BillFlowNodeDAL  {  }  public partial class oldWF_BillFlowNodeRemarkDAL : BaseDAL<Model.oldWF_BillFlowNodeRemark>,IoldWF_BillFlowNodeRemarkDAL  {  }  public partial class oldWF_BillStateDAL : BaseDAL<Model.oldWF_BillState>,IoldWF_BillStateDAL  {  }  public partial class oldWF_NodeDAL : BaseDAL<Model.oldWF_Node>,IoldWF_NodeDAL  {  }  public partial class oldWF_NodeStateDAL : BaseDAL<Model.oldWF_NodeState>,IoldWF_NodeStateDAL  {  }  public partial class oldWF_WorkFlowDAL : BaseDAL<Model.oldWF_WorkFlow>,IoldWF_WorkFlowDAL  {  }  public partial class oldWF_WorkFlowNodeDAL : BaseDAL<Model.oldWF_WorkFlowNode>,IoldWF_WorkFlowNodeDAL  {  }  public partial class Ou_DepartmentDAL : BaseDAL<Model.Ou_Department>,IOu_DepartmentDAL  {  }  public partial class Ou_PermissionDAL : BaseDAL<Model.Ou_Permission>,IOu_PermissionDAL  {  }  public partial class Ou_RoleDAL : BaseDAL<Model.Ou_Role>,IOu_RoleDAL  {  }  public partial class Ou_RolePermissionDAL : BaseDAL<Model.Ou_RolePermission>,IOu_RolePermissionDAL  {  }  public partial class Ou_UserInfoDAL : BaseDAL<Model.Ou_UserInfo>,IOu_UserInfoDAL  {  }  public partial class Ou_UserRoleDAL : BaseDAL<Model.Ou_UserRole>,IOu_UserRoleDAL  {  }  public partial class Ou_UserVipPermissionDAL : BaseDAL<Model.Ou_UserVipPermission>,IOu_UserVipPermissionDAL  {  }  public partial class W_WorkFlowDAL : BaseDAL<Model.W_WorkFlow>,IW_WorkFlowDAL  {  }  public partial class W_WorkFlowBranchDAL : BaseDAL<Model.W_WorkFlowBranch>,IW_WorkFlowBranchDAL  {  }  public partial class W_WorkFlowNodeDAL : BaseDAL<Model.W_WorkFlowNode>,IW_WorkFlowNodeDAL  {  }  public partial class W_WrokFlowRoleDAL : BaseDAL<Model.W_WrokFlowRole>,IW_WrokFlowRoleDAL  {  }  public partial class WR_WorkFlowApplyDAL : BaseDAL<Model.WR_WorkFlowApply>,IWR_WorkFlowApplyDAL  {  }  public partial class WR_WrokFlowApplyDetailsDAL : BaseDAL<Model.WR_WrokFlowApplyDetails>,IWR_WrokFlowApplyDetailsDAL  {  }}

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7、添加业务层的父类BaseBLL.cs

using System;using System.Collections.Generic;using System.Linq;using System.Linq.Expressions;using System.Text;using System.Reflection;namespace BLL{  /// <summary>  /// 业务层父类  /// </summary>  /// <typeparam name="T"></typeparam>  public abstract class BaseBLL<T> : IBLL.IBaseBLL<T> where T : class,new()  {    public BaseBLL()    {      SetDAL();    }    //1.数据层接口 对象 - 等待 被实例化    protected IDAL.IBaseDAL<T> idal;// = new idal.BaseDAL();    /// <summary>    /// 由子类实现,为 业务父类 里的 数据接口对象 设置 值!    /// </summary>    public abstract void SetDAL();    //2.增删改查方法    #region 1.0 新增 实体 +int Add(T model)    /// <summary>    /// 新增 实体    /// </summary>    /// <param name="model"></param>    /// <returns></returns>    public int Add(T model)    {      return idal.Add(model);    }    #endregion    #region 2。0 根据 用户 id 删除 +int Del(int uId)    /// <summary>    /// 根据 用户 id 删除    /// </summary>    /// <param name="uId"></param>    /// <returns></returns>    public int Del(T model)    {      return idal.Del(model);    }    #endregion    #region 3.0 根据条件删除 +int DelBy(Expression<Func<T, bool>> delWhere)    /// <summary>    /// 3.0 根据条件删除    /// </summary>    /// <param name="delWhere"></param>    /// <returns></returns>    public int DelBy(Expression<Func<T, bool>> delWhere)    {      return idal.DelBy(delWhere);    }    #endregion    #region 4.0 修改 +int Modify(T model, params string[] proNames)    /// <summary>    /// 4.0 修改,如:    /// </summary>    /// <param name="model">要修改的实体对象</param>    /// <param name="proNames">要修改的 属性 名称</param>    /// <returns></returns>    public int Modify(T model, params string[] proNames)    {      return idal.Modify(model, proNames);    }    #endregion    #region 4.0 批量修改 +int Modify(T model, Expression<Func<T, bool>> whereLambda, params string[] modifiedProNames)    /// <summary>    /// 4.0 批量修改 +int Modify(T model, Expression<Func<T, bool>> whereLambda, params string[] modifiedProNames)    /// </summary>    /// <param name="model"></param>    /// <param name="whereLambda"></param>    /// <param name="modifiedProNames"></param>    /// <returns></returns>    public int ModifyBy(T model, Expression<Func<T, bool>> whereLambda, params string[] modifiedProNames)    {      return idal.ModifyBy(model, whereLambda, modifiedProNames);    }    #endregion    #region 5.0 根据条件查询 +List<T> GetListBy(Expression<Func<T,bool>> whereLambda)    /// <summary>    /// 5.0 根据条件查询 +List<T> GetListBy(Expression<Func<T,bool>> whereLambda)    /// </summary>    /// <param name="whereLambda"></param>    /// <returns></returns>    public List<T> GetListBy(Expression<Func<T, bool>> whereLambda)    {      return idal.GetListBy(whereLambda);    }    #endregion    #region 5.1 根据条件 排序 和查询 + List<T> GetListBy<TKey>    /// <summary>    /// 5.1 根据条件 排序 和查询    /// </summary>    /// <typeparam name="TKey">排序字段类型</typeparam>    /// <param name="whereLambda">查询条件 lambda表达式</param>    /// <param name="orderLambda">排序条件 lambda表达式</param>    /// <returns></returns>    public List<T> GetListBy<TKey>(Expression<Func<T, bool>> whereLambda, Expression<Func<T, TKey>> orderLambda)    {      return idal.GetListBy(whereLambda, orderLambda);    }    #endregion    #region 6.0 分页查询 + List<T> GetPagedList<TKey>    /// <summary>    /// 6.0 分页查询 + List<T> GetPagedList<TKey>    /// </summary>    /// <param name="pageIndex">页码</param>    /// <param name="pageSize">页容量</param>    /// <param name="whereLambda">条件 lambda表达式</param>    /// <param name="orderBy">排序 lambda表达式</param>    /// <returns></returns>    public List<T> GetPagedList<TKey>(int pageIndex, int pageSize, Expression<Func<T, bool>> whereLambda, Expression<Func<T, TKey>> orderBy)    {      return idal.GetPagedList(pageIndex, pageSize, whereLambda, orderBy);    }    #endregion  }}

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8、同样的拷贝IBLL.tt到BLL项目下,重命名为BLL.tt,然后修改T4模板,按Ctrl+S自动生成代码,自动生成的BLL.cs如下:

 using System;using System.Collections.Generic;using System.Linq;using System.Text;using IBLL;namespace BLL{  public partial class Bill_LeaveBLL : BaseBLL<Model.Bill_Leave>,IBill_LeaveBLL  {  }  public partial class oldWF_AutoTransactNodeBLL : BaseBLL<Model.oldWF_AutoTransactNode>,IoldWF_AutoTransactNodeBLL  {  }  public partial class oldWF_BillFlowNodeBLL : BaseBLL<Model.oldWF_BillFlowNode>,IoldWF_BillFlowNodeBLL  {  }  public partial class oldWF_BillFlowNodeRemarkBLL : BaseBLL<Model.oldWF_BillFlowNodeRemark>,IoldWF_BillFlowNodeRemarkBLL  {  }  public partial class oldWF_BillStateBLL : BaseBLL<Model.oldWF_BillState>,IoldWF_BillStateBLL  {  }  public partial class oldWF_NodeBLL : BaseBLL<Model.oldWF_Node>,IoldWF_NodeBLL  {  }  public partial class oldWF_NodeStateBLL : BaseBLL<Model.oldWF_NodeState>,IoldWF_NodeStateBLL  {  }  public partial class oldWF_WorkFlowBLL : BaseBLL<Model.oldWF_WorkFlow>,IoldWF_WorkFlowBLL  {  }  public partial class oldWF_WorkFlowNodeBLL : BaseBLL<Model.oldWF_WorkFlowNode>,IoldWF_WorkFlowNodeBLL  {  }  public partial class Ou_DepartmentBLL : BaseBLL<Model.Ou_Department>,IOu_DepartmentBLL  {  }  public partial class Ou_PermissionBLL : BaseBLL<Model.Ou_Permission>,IOu_PermissionBLL  {  }  public partial class Ou_RoleBLL : BaseBLL<Model.Ou_Role>,IOu_RoleBLL  {  }  public partial class Ou_RolePermissionBLL : BaseBLL<Model.Ou_RolePermission>,IOu_RolePermissionBLL  {  }  public partial class Ou_UserInfoBLL : BaseBLL<Model.Ou_UserInfo>,IOu_UserInfoBLL  {  }  public partial class Ou_UserRoleBLL : BaseBLL<Model.Ou_UserRole>,IOu_UserRoleBLL  {  }  public partial class Ou_UserVipPermissionBLL : BaseBLL<Model.Ou_UserVipPermission>,IOu_UserVipPermissionBLL  {  }  public partial class W_WorkFlowBLL : BaseBLL<Model.W_WorkFlow>,IW_WorkFlowBLL  {  }  public partial class W_WorkFlowBranchBLL : BaseBLL<Model.W_WorkFlowBranch>,IW_WorkFlowBranchBLL  {  }  public partial class W_WorkFlowNodeBLL : BaseBLL<Model.W_WorkFlowNode>,IW_WorkFlowNodeBLL  {  }  public partial class W_WrokFlowRoleBLL : BaseBLL<Model.W_WrokFlowRole>,IW_WrokFlowRoleBLL  {  }  public partial class WR_WorkFlowApplyBLL : BaseBLL<Model.WR_WorkFlowApply>,IWR_WorkFlowApplyBLL  {  }  public partial class WR_WrokFlowApplyDetailsBLL : BaseBLL<Model.WR_WrokFlowApplyDetails>,IWR_WrokFlowApplyDetailsBLL  {  }}

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到此,业务父类、业务类、数据父类、数据类都已经创建好了,里面有些东西还需要优化的,后续一步一步完善。