C# · 12月 27, 2021

c# – 无法加载文件或程序集’EntityFramework,Version = 6.0.0.0,

我正在与EF合作.
我试图执行这一行 public ActionResult Edit(string id){ return View(obj.FindSemesterById(id));}

我在我的项目中安装了EF版本5.

但是我得到这个错误:

Could not load file or assembly ‘EntityFramework,Version=6.0.0.0,
Culture=neutral,
PublicKeyToken=b77a5c561934e089’ or one of its dependencies. The located assembly’s
manifest deFinition does not match the assembly reference. (Exception from HRESULT:
0x80131040)

我的web.config文件:

<?xml version=”1.0″ encoding=”utf-8″?><!– 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=5.0.0.0,Culture=neutral,PublicKeyToken=b77a5c561934e089″ requirePermission=”false” /> </configSections> <connectionStrings> <add name=”EducationDBEntities” connectionString=”Metadata=res://*/EducationModel.csdl|res://*/EducationModel.ssdl|res://*/EducationModel.msl;provider=System.Data.sqlClient;provider connection string=&quot;data source=.;initial catalog=EducationDB;integrated security=True;MultipleActiveResultSets=True;App=EntityFramework&quot;” providerName=”System.Data.EntityClient” /> </connectionStrings> <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> <system.web> <compilation debug=”true” targetFramework=”4.5″ /> <httpRuntime targetFramework=”4.5″ /> <authentication mode=”Forms”> <forms loginUrl=”~/Account/Login” timeout=”2880″ /> </authentication> <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.Optimization” /> <add namespace=”System.Web.Routing” /> <add namespace=”System.Web.WebPages” /> </namespaces> </pages> </system.web> <system.webServer> <validation validateIntegratedModeConfiguration=”false” /> <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,OPTIONS” modules=”IsapiModule” scriptProcessor=”%windir%\Microsoft.NET\Framework64\v4.0.30319\aspnet_isapi.dll” preCondition=”classicMode,bitness64″ responseBufferLimit=”0″ /> <add name=”ExtensionlessUrlHandler-Integrated-4.0″ path=”*.” verb=”GET,OPTIONS” type=”System.Web.Handlers.TransferRequestHandler” preCondition=”integratedMode,runtimeVersionv4.0″ /> </handlers> </system.webServer> <runtime> <assemblyBinding xmlns=”urn:schemas-microsoft-com:asm.v1″> <dependentAssembly> <assemblyIdentity name=”System.Web.Helpers” publicKeyToken=”31bf3856ad364e35″ /> <bindingRedirect oldVersion=”1.0.0.0-2.0.0.0″ newVersion=”2.0.0.0″ /> </dependentAssembly> <dependentAssembly> <assemblyIdentity name=”System.Web.Mvc” publicKeyToken=”31bf3856ad364e35″ /> <bindingRedirect oldVersion=”1.0.0.0-4.0.0.0″ newVersion=”4.0.0.0″ /> </dependentAssembly> <dependentAssembly> <assemblyIdentity name=”System.Web.WebPages” publicKeyToken=”31bf3856ad364e35″ /> <bindingRedirect oldVersion=”1.0.0.0-2.0.0.0″ newVersion=”2.0.0.0″ /> </dependentAssembly> </assemblyBinding> </runtime> <entityFramework> <defaultConnectionFactory type=”System.Data.Entity.Infrastructure.LocalDbConnectionFactory,EntityFramework”> <parameters> <parameter value=”v11.0″ /> </parameters> </defaultConnectionFactory> </entityFramework></configuration>解决方法 从评论部分看来,您无法从公共NuGet源安装最新版本的EF,因为您的计算机没有直接访问互联网,无法解析www.nuget.org域.通常,如果您在互联网设置中配置代理,Visual Studio将在从公共存储库安装NuGet时使用此代理.

因此,一旦您在项目中安装了最新的EF 6.1.0软件包,错误就会消失.目前,您似乎正在使用一些较旧版本的软件包,并且您的解决方案中有项目需要v6.