在vs2015上使用asp.netcore+efcore

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官方的文档https://docs.asp.net/en/latest/tutorials/first-mvc-app/start-mvc.html

先来看一下实现的效果

开始之前，确定本机已经有.NET Core环境。https://www.microsoft.com/net/core#windows

1.创建解决方案的文件结构如下图（模糊处理的过文件是自己后面加的和ef生成的）。

2.要使用ef core，先引用ef core相关的程序包。https://docs.efproject.net/en/latest/platforms/aspnetcore/existing-db.html

打开project.json，将“Microsoft.EntityFrameworkCore.SqlServer”、“Microsoft.EntityFrameworkCore.SqlServer.Design”和“Microsoft.EntityFrameworkCore.Design”添加到“dependencies”下；将“Microsoft.EntityFrameworkCore.Tools”添加到“tools”下。（注：当然这些都可以通过NuGet来安装，需要注意的是用nuget安装“Microsoft.EntityFrameworkCore.Tools”时，要将其移动到“tools”下）

3.打开连接到数据库，设置数据库连接字符串

4.打开程序包管理控制台，运行下面命令。-OutputDir Models指向生成文件存放文件的位置是Models

Scaffold-DbContext "Server=.;Database=CoreDemo;Trusted_Connection=True;User ID=你的连接数据库的用户;Password=你的连接数据库的密码;" Microsoft.EntityFrameworkCore.SqlServer -OutputDir Models

5.打开刚才用Scaffold-DbContext生成的CoreDemoContext.cs的文件，移除OnConfiguring方法

6.在CoreDemoContext.cs里面加入下面代码

1 public CoreDemoContext(DbContextOptions<CoreDemoContext> option)
2       : base(option)
3 { }

7.打开appsettings.json，加入下面的数据连接配置代码

"ConnectionStrings": {
    "CoreDemoDatabase": "Server=.;Database=CoreDemo;Trusted_Connection=True;User ID=你的连接数据库的用户;Password=你的连接数据库的密码;"
  }

8.打开Startup.cs，修改ConfigureServices方法，如下

1 public void ConfigureServices(IServiceCollection services)
2 {
3       // Add framework services.
4       services.AddMvc();
5       services.AddDbContext<CoreDemoContext>(option => option.UseSqlServer(Configuration.GetConnectionString("CoreDemoDatabase"))); // 获取sql连接配置
6 }

9.添加一个新的Controller--UserController

 1     public class UserController : Controller
 2     {
 3         private CoreDemoContext _context;
 4 
 5         public UserController(CoreDemoContext context)
 6         {
 7             _context = context;
 8         }
 9 
10         // GET: /<controller>/
11         public IActionResult Index()
12         {
13             var users = (from u in _context.TUsers
14                          select u).ToList();
15             return View(users);
16         }
17 
18         public IActionResult Create()
19         {
20             return View();
21         }
22 
23         [HttpPost]
24         [ValidateAntiForgeryToken]
25         public async Task<IActionResult> Create(UserViewModel model)
26         {
27             if (!ModelState.IsValid)
28             {
29                 return View(model);
30             }
31 
32             TUsers user = new TUsers()
33             {
34                 Name = model.Name
35             };
36             _context.TUsers.Add(user);
37             int result = await _context.SaveChangesAsync();
38             return RedirectToAction("Index");
39         }
40     }

10.创建Index视图和Create视图

 1 @model IEnumerable<TUsers>
 2 
 3 @{
 4     ViewBag.Title = "用户列表";
 5 }
 6 
 7 <h2>用户列表</h2>
 8 <p>
 9     <a asp-action="Create">添加用户</a>
10 </p>
11 
12 <table class="table table-bordered table-hover table-striped">
13     <tr>
14         <th>姓名</th>
15         <th>创建日期</th>
16     </tr>
17     @foreach (var item in Model)
18     {
19         <tr>
20             <td>
21                 @Html.DisplayFor(modelItem => item.Name)
22             </td>
23             <td>
24                 @(((DateTime)item.CreateDate).ToString("yyyy-MM-dd hh:mm:ss"))
25             </td>
26         </tr>
27     }
28 </table>

 1 @model WebDemo.Models.UserViewModel
 2 
 3 @{
 4     ViewBag.Title = "新增用户";
 5 }
 6 
 7 <h2>创建一个新用户</h2>
 8 
 9 <form asp-action="Create" method="post">
10     <div class="form-horizontal">
11         @*<div asp-validation-summary="All" class="text-danger"></div>*@
12         <div class="form-group">
13             <label asp-for="Name" class="col-md-2 control-label">姓名：</label>
14             <div class="col-md-10">
15                 <input asp-for="Name" class="form-control" />
16                 <span asp-validation-for="Name" class="text-danger"></span>
17             </div>
18         </div>
19         <div class="form-group">
20             <div class="col-md-offset-2 col-md-10">
21                 <input type="submit" value="Create" class="btn btn-default" />
22             </div>
23         </div>
24     </div>
25 </form>
26 
27 @section scripts{
28     @* 添加jquery验证库 *@
29     <environment names="Development">
30         <script src="~/lib/jquery-validation/dist/jquery.validate.js" asp-append-version="true"></script>
31         <script src="~/lib/jquery-validation-unobtrusive/jquery.validate.unobtrusive.js" asp-append-version="true"></script>
32     </environment>
33     <environment names="Staging,Production">
34         <script src="~/lib/jquery-validation/dist/jquery.validate.min.js" asp-append-version="true"></script>
35         <script src="~/lib/jquery-validation-unobtrusive/jquery.validate.unobtrusive.min.js" asp-append-version="true"></script>
36     </environment>
37 }