0x01、前言
学习
ASP.NET Core也有一段时间了,虽说很多内容知识点还是处于一知半解的状态,但是基本的,还是
略懂一二。如果有错误,还望见谅。
本文还是和之前一样,Demo+在
Linux下运行(CentOS7+
dotnetcore sdk)
开发环境:win10+vs2015+sqlserver2014
0x02、demo
新建一个ASP.NET Core Web Application项目--Catcher.EasyDemo.Website
干掉Controllers文件夹。由于个人习惯问题,习惯性将Controller分离出来。
新建三个Class Library项目:
Catcher.EasyDemo.Controllers:剥离出来的Controller
Catcher.EasyDemo.DataAccess:数据访问
Catcher.EasyDemo.Models:模型
Controller项目需要添加MVC的引用:"Microsoft.AspNetCore.Mvc": "1.0.0"
在Controllers中添加HomeController,内容和生成的是一样的。然后在Website中添加引用,这里有
两种方式,一种是和平常一样的右键->添加引用,另一种是在project.json中的dependencies节点下
面添加 "Catcher.EasyDemo.Controllers": "1.0.0-*",然后就会自动restore,完成之后就能正常跑起
来了。(这里就不截图了)
下面的话,在Models中添加一个Product类:
1 namespace Catcher.EasyDemo.Models 2 { 3 public class Product 4 { 5 public int ProductId { get; set; } 6 public string ProductName { get; set; } 7 public string ProductSource { get; set; } 8 public decimal ProductPrice { get; set; } 9 }10 }
在DataAccess中添加ProductDataAccess类,用于数据交互,里面有用到dapper,所以要添加引用,
以及用到了读取json配置的方法,所以还要添加Microsoft.Extensions.Configuration的引用,同时还要添加Models的引用,方法上面已经说过了。
这里没有用一些复杂的东西,就一个单例模式和一些简单的数据库操作。
1 using Catcher.EasyDemo.Models; 2 using Dapper; 3 using Microsoft.Extensions.Configuration; 4 using System.Collections.Generic; 5 using System.Data; 6 using System.Data.SqlClient; 7 using System.IO; 8 using System.Linq; 9 10 namespace Catcher.EasyDemo.DataAccess 11 { 12 public sealed class ProductDataAccess 13 { 14 public static ProductDataAccess Instance 15 { 16 get 17 { 18 return Nested.instance; 19 } 20 } 21 22 class Nested 23 { 24 static Nested() { } 25 internal static readonly ProductDataAccess instance = new ProductDataAccess(); 26 } 27 28 /// <summary> 29 /// get the connection string form the appsettings.json 30 /// </summary> 31 /// <returns></returns> 32 private string GetConnStr() 33 { 34 var builder = new ConfigurationBuilder(); 35 builder.SetBasePath(Directory.GetCurrentDirectory()); 36 builder.AddJsonFile("appsettings.json"); 37 var config = builder.Build(); 38 return config.GetConnectionString("dapperConn"); 39 } 40 41 /// <summary> 42 /// open the connection 43 /// </summary> 44 /// <returns></returns> 45 private SqlConnection OpenConnection() 46 { 47 SqlConnection conn = new SqlConnection(GetConnStr()); 48 conn.Open(); 49 return conn; 50 } 51 52 /// <summary> 53 /// get all products 54 /// </summary> 55 /// <returns></returns> 56 public IList<Product> GetAll() 57 { 58 using (IDbConnection conn = OpenConnection()) 59 { 60 string sql = @"SELECT [ProductId] 61 ,[ProductName] 62 ,[ProductSource] 63 ,[ProductPrice] 64 FROM [dbo].[Product]"; 65 return conn.Query<Product>(sql).ToList(); 66 } 67 } 68 69 /// <summary> 70 /// delete the product by product's id 71 /// </summary> 72 /// <param name="pid">id of the product</param> 73 /// <returns></returns> 74 public bool Delete(int pid) 75 { 76 using (IDbConnection conn = OpenConnection()) 77 { 78 string sql = string.Format(@"DELETE FROM [dbo].[Product] WHERE [ProductId]={0} ", pid.ToString()); 79 return conn.Execute(sql) > 0; 80 } 81 } 82 83 /// <summary> 84 /// add the product 85 /// </summary> 86 /// <param name="product">entity of the product</param> 87 /// <returns></returns> 88 public bool Add(Product product) 89 { 90 using (IDbConnection conn = OpenConnection()) 91 { 92 string sql = string.Format(@"INSERT INTO [dbo].[Product] 93 ([ProductName] 94 ,[ProductSource] 95 ,[ProductPrice]) 96 VALUES 97 ('{0}','{1}',{2})", product.ProductName, product.ProductSource, product.ProductPrice); 98 return conn.Execute(sql) > 0; 99 }100 }101 }102 }
然后在Controllers中添加一个ProductController,具体内容如下:
1 using Microsoft.AspNetCore.Mvc; 2 using Catcher.EasyDemo.Models; 3 using Catcher.EasyDemo.DataAccess; 4 5 namespace Catcher.EasyDemo.Controllers 6 { 7 public class ProductController : Controller 8 { 9 /// <summary>10 /// Index11 /// </summary>12 /// <returns></returns> 13 public IActionResult Index()14 { 15 return View(ProductDataAccess.Instance.GetAll());16 }17 18 /// <summary>19 /// Add20 /// </summary>21 /// <returns></returns>22 public IActionResult Add()23 {24 return View();25 }26 [HttpPost]27 public IActionResult Add(Product product)28 {29 bool isOK = ProductDataAccess.Instance.Add(product);30 31 if (isOK)32 {33 return RedirectToAction("Index");34 }35 else36 {37 TempData["err"] = "sorry!there were some errors!Please try again.";38 return View();39 }40 }41 42 /// <summary>43 /// Delete44 /// </summary>45 /// <param name="pid"></param>46 /// <returns></returns>47 public IActionResult Delete(int pid)48 {49 bool isOK = ProductDataAccess.Instance.Delete(pid);50 51 if (isOK)52 {53 return RedirectToAction("Index");54 }55 else56 {57 TempData["err"] = "sorry!there were some errors!Please try again.";58 return View("Index");59 }60 }61 }62 }
控制器的话,应该没有什么太多好说的,毕竟差别不会太大。
下面要做的就是添加视图和连接字符串。
先添加视图:添加一个Product文件夹,在这里存放相应的视图
添加Index.cshtml
1 @model IEnumerable<Catcher.EasyDemo.Models.Product> 2 @{ 3 ViewData["Title"] = "Product Index"; 4 } 5 <a asp-action="Add" asp-controller="Product">Add a New Product</a> 6 <div class="container"> 7 <table class="table table-responsive"> 8 9 <thead>10 <tr>11 <td>ID</td>12 <td>Name</td>13 <td>Price</td>14 <td>Source</td>15 <td>Opreation</td>16 </tr>17 </thead>18 19 <tbody>20 @foreach (var item in Model)21 {22 <tr>23 <td>@item.ProductId</td>24 <td>@item.ProductName</td>25 <td>@item.ProductPrice</td>26 <td>@item.ProductSource</td>27 <td>28 <a asp-action="Delete" asp-controller="Product" asp-route-pid="@item.ProductId">Delete</a>29 </td>30 </tr>31 }32 </tbody>33 </table>34 </div>
视图与mvc用的法大致相同,不同就是TagHelper,不过大部分是一看就知道是什么意思,要做什么操作,也不做过多解释。
添加Add.cshtml
1 @model Catcher.EasyDemo.Models.Product 2 @{ 3 ViewData["Title"] = "Add"; 4 } 5 <div class="container"> 6 <form asp-action="Add" asp-controller="Product" method="post"> 7 <div class="form-group"> 8 <label asp-for="ProductName">Name</label> 9 <input asp-for="ProductName" type="text" placeholder="enter the product name" />10 </div>11 <div class="form-group">12 <label asp-for="ProductPrice">Price</label>13 <input asp-for="ProductPrice" type="text" placeholder="enter the product price" />14 </div>15 <div class="form-group">16 <label asp-for="ProductSource">Source</label>17 <input asp-for="ProductSource" type="text" placeholder="enter the product source" />18 </div>19 <div class="form-group">20 <button type="submit" class="btn btn-primary">Add Product</button>21 </div>22 </form>23 </div>
还要添加的是连接字符串,在appsettings.json中添加一个节点
1 "connectionStrings": {2 "dapperConn": "server=127.0.0.1;database=nancydemo;user id=sa;password=123;"3 }
当然,这是在本地的,放到linux时,需要替换成相应的ip
来一张项目截图:
到这里,编码工作已经ok了,编译,发布即可
0x03、Linux下运行
这里没有采用jexus的方式部署,原因是想尝尝另外的方式。
在CentOS上安装dotnet core的方式可以看这里,就不在累赘了
https://www.microsoft.com/net/core#centos
安装好了之后,运行dotnet会提示
确定dotnet core 安装成功之后,
就是把发布后的项目扔到CentOS中,习惯放到/var/www目录下面
进入到相应的目录,运行dotnet 网站对应的dll即可
并且,在终端还能查看一系列的操作
总之,dotNET Core 用起来感觉不错
原标题:来份ASP.NET Core尝尝
关键词:ASP.NET