MVC 數據庫連接

1.創建數據庫

2.創建表

<pre name="code" class="sql">CREATE TABLE [dbo].[Student](
	[ID] [INT] IDENTITY(1,1) NOT NULL,
	[Name] [NVARCHAR](30) NULL,
	[StudentNo] [NVARCHAR](20) NULL,
	[Age] [INT] NULL,
	[Sex] [NVARCHAR](2) NULL,
	[Description] [NVARCHAR](100) NULL,
	[classID] [INT] NULL
) ON [PRIMARY]

3.安裝EntityFramework

點擊“References”，鼠標右鍵選擇：“Manage NuGet Packages...”。

在線搜索“EntityFramework”，下載安裝

4.添加數據庫連接字符串

雙擊“Web.config”

添加連接字符串：

<connectionStrings>
    <add name="DataConnection" connectionString="server=127.0.0.1;database=Test;uid=sa;pwd=123456" providerName="System.Data.SqlClient"/>
  </connectionStrings>

5.在Models目錄下，添加實體上下文類StuInfoDBContext

注意添加EF應用

DataConnection爲連接字符串的名稱

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Data.Entity;

namespace Iweb.Areas.SiteInfo.Models
{
    public class StuInfoDBContext:DbContext
    {
        public StuInfoDBContext()
            : base("DataConnection")
        {
        }
    }
}

6.在Models目錄下，添加實體模型類Student

注意和數據庫中表名保持一致，否則EF會新創建一張實體模型類對應的表

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace Iweb.Areas.SiteInfo.Models
{
    public class Student
    {
        public int ID { get; set; }
        public string Name { get; set; }
        public string StudentNo { get; set; }
        public int Age { get; set; }
        public string Sex { get; set; }
        public string Description { get; set; }
        public int classID { get; set; }
    }
}

7.這樣程序就和數據庫連接起來了，程序中的實體模型和數據庫中的表一一對應

8.測試

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Data;
using Iweb.Areas.SiteInfo.Models;

namespace Iweb.Areas.SiteInfo.Controllers
{
    public class SiteInfoController : Controller
    {
        //
        // GET: /SiteInfo/SiteInfo/

        public ActionResult Index()
        {
            StuInfoDBContext stuContext = new StuInfoDBContext();
            string sql = @"INSERT INTO dbo.Student
            ( Name ,
            StudentNo ,
            Age ,
            Sex ,
            Description ,
            classID
            )
            VALUES  ( N'abc' , -- Name - nvarchar(30)
                    N'1010322119' , -- StudentNo - nvarchar(20)
                    24 , -- Age - int
                    N'男' , -- Sex - nvarchar(2)
                    N'健身，爬山' , -- Description - nvarchar(100)
                    2  -- classID - int
            )";
            stuContext.Database.ExecuteSqlCommand(sql);
            List<Student> stuLis= stuContext.Database.SqlQuery<Student>("SELECT * FROM dbo.Student").ToList();
            return View();
        }

    }
}