c# - 如何从 Entity Framework 4 升级到 EF6？

Question

我想使用 Entity Framework 6 创建一个 EntityDataModel，但每次我尝试都会收到此错误:

您的项目引用了旧版本的 Entity Framework 。

我使用的是 Visual Studio 2013，我的项目是 Asp.net 4.5.1 Web 窗体项目。这是我的 web.config 文件，我删除了这个文件的一些部分以解决问题，但都是徒劳的。

<?xml version="1.0"?>
<!--
For more information on how to configure your ASP.NET application, please   visit
http://go.microsoft.com/fwlink/?LinkId=169433
-->
<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>
<!--
For a description of web.config changes see http://go.microsoft.com/fwlink/?LinkId=235367.

The following attributes can be set on the <httpRuntime> tag.
  <system.Web>
    <httpRuntime targetFramework="4.5.1" />
  </system.Web>
-->
<system.web>
<compilation debug="true" targetFramework="4.5.1">
  <assemblies/>
</compilation>
<httpRuntime targetFramework="4.5"/>
<customErrors mode="Off"/>
</system.web>
<system.codedom>
<compilers>
  <!--<compiler language="c#;cs;csharp" extension=".cs" type="Microsoft.CodeDom.Providers.DotNetCompilerPlatform.CSharpCodeProvider, Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" warningLevel="4" compilerOptions="/langversion:6 /nowarn:1659;1699;1701" />
  <compiler language="vb;vbs;visualbasic;vbscript" extension=".vb" type="Microsoft.CodeDom.Providers.DotNetCompilerPlatform.VBCodeProvider, Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" warningLevel="4" compilerOptions="/langversion:14 /nowarn:41008 /define:_MYTYPE=\&quot;Web\&quot; /optionInfer+" />
  -->
</compilers>
</system.codedom>
<appSettings>
<add key="ValidationSettings:UnobtrusiveValidationMode" value="None"/>
</appSettings>
<connectionStrings>
<add name="tebimir_db_tebimEntities" connectionString="metadata=res://*/DataAccessLayer.tebimir_db_tebim.csdl|res://*/DataAccessLayer.tebimir_db_tebim.ssdl|res://*/DataAccessLayer.tebimir_db_tebim.msl;provider=System.Data.SqlClient;provider connection string=&quot;data source=tebim.ir,9993;initial catalog=tebimir_db_tebim;persist security info=True;user id=tebimir_dbadmin;password=qwerty*2607548;MultipleActiveResultSets=True;App=EntityFramework&quot;" providerName="System.Data.EntityClient"/>
 <add name="tebimir_db_tebimEntities_plain" connectionString="data source=185.94.97.58,9993;initial catalog=tebimir_db_tebim;persist security info=True;user id=tebimir_dbadmin;password=qwerty*2607548;"/>
 </connectionStrings>
 <system.webServer>
 <defaultDocument>
  <files>
    <clear/>
    <add value="index.aspx"/>
  </files>
</defaultDocument>
 <validation validateIntegratedModeConfiguration="false"/>
</system.webServer>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
  <parameters>
    <parameter value="mssqllocaldb"/>
   </parameters>
  </defaultConnectionFactory>
  <providers>
  <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer"/>
   </providers>
  </entityFramework>
 </configuration>

Answer 1

尝试使用 NuGet 更新 Entity Framework 在添加模型之前，请按照以下步骤操作

1. 在 VS 解决方案资源管理器中右键单击您的项目并选择“管理 NuGet 包”

2. 选择 EntityFramework 广告点击更新。

3. 现在添加实体数据模型。