MVC4建立DBContext的EF6数据

MVC4建立DBContext的EF6数据时

1.需要using System.Data.Entity;命名空间

2.此命名空间需要安装EntityFromwork.dll，此dll可以在项目——》管理NuGet程序包里联机搜索EntityFromwork并安装即可

3.建立类wenbingDBContext并继承DbContext，此时就需要上面的命名空间了

4.程序代码如下：

using System;

using System.Collections.Generic;

using System.Data.Entity;

using System.Linq;

using System.Web;

 

namespace wenbing.Models

{

    public class  wenbingDBContext : DbContext

    {

        public wenbingDBContext()

            : base("name=at_advertisement")

        { }

        public DbSet accounts { get; set; }

    }

}

5，在2中安装EntityFromwork成功后会在项目根目录下的web.config里面出现以下xml文件，如下红色xml

 

<configuration>

  <configSections>

    <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->

    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />

  </configSections>

  <appSettings>

    <add key="webpages:Version" value="2.0.0.0" />

    <add key="webpages:Enabled" value="false" />

    <add key="PreserveLoginUrl" value="true" />

    <add key="ClientValidationEnabled" value="true" />

    <add key="UnobtrusiveJavaScriptEnabled" value="true" />

  </appSettings>

  <connectionStrings>

    <add name="at_advertisement" connectionString="Server=mysql55.cloudsapp.cn;database=at_advertisement;port=3312;uid=root;password=159357;" />

  </connectionStrings>

  <system.web>

    <compilation debug="true" targetFramework="4.0" />

    <pages>

      <namespaces>

        <add namespace="System.Web.Helpers" />

        <add namespace="System.Web.Mvc" />

        <add namespace="System.Web.Mvc.Ajax" />

        <add namespace="System.Web.Mvc.Html" />

        <add namespace="System.Web.Routing" />

        <add namespace="System.Web.WebPages" />

      </namespaces>

    </pages>

  </system.web>

  <system.webServer>

    <validation validateIntegratedModeConfiguration="false" />

    <modules runAllManagedModulesForAllRequests="true" />

    <handlers>

      <remove name="ExtensionlessUrlHandler-ISAPI-4.0_32bit" />

      <remove name="ExtensionlessUrlHandler-ISAPI-4.0_64bit" />

      <remove name="ExtensionlessUrlHandler-Integrated-4.0" />

      <add name="ExtensionlessUrlHandler-ISAPI-4.0_32bit" path="*." verb="GET,HEAD,POST,DEBUG,PUT,DELETE,PATCH,OPTIONS" modules="IsapiModule" scriptProcessor="%windir%\Microsoft.NET\Framework\v4.0.30319\aspnet_isapi.dll" preCondition="classicMode,runtimeVersionv4.0,bitness32" responseBufferLimit="0" />

      <add name="ExtensionlessUrlHandler-ISAPI-4.0_64bit" path="*." verb="GET,HEAD,POST,DEBUG,PUT,DELETE,PATCH,OPTIONS" modules="IsapiModule" scriptProcessor="%windir%\Microsoft.NET\Framework64\v4.0.30319\aspnet_isapi.dll" preCondition="classicMode,runtimeVersionv4.0,bitness64" responseBufferLimit="0" />

      <add name="ExtensionlessUrlHandler-Integrated-4.0" path="*." verb="GET,HEAD,POST,DEBUG,PUT,DELETE,PATCH,OPTIONS" type="System.Web.Handlers.TransferRequestHandler" preCondition="integratedMode,runtimeVersionv4.0" />

    </handlers>

  </system.webServer>

  <entityFramework>

    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">

      <parameters>

        <parameter value="v11.0" />

      </parameters>

    </defaultConnectionFactory>

    <providers>

      <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />

    </providers>

  </entityFramework>

</configuration>