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MVC4建立DBContext的EF6数据

2024-07-18 00:42:55   223人阅读

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="http://www.mamicode.com/2.0.0.0" />
    <add key="webpages:Enabled" value="http://www.mamicode.com/false" />
    <add key="PreserveLoginUrl" value="http://www.mamicode.com/true" />
    <add key="ClientValidationEnabled" value="http://www.mamicode.com/true" />
    <add key="UnobtrusiveJavaScriptEnabled" value="http://www.mamicode.com/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="http://www.mamicode.com/v11.0" />
      </parameters>
    </defaultConnectionFactory>
    <providers>
      <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
    </providers>
  </entityFramework>
</configuration>


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