如何在ASP中启用实体框架.. NET WebForms网站项目

Question

如何在Visual Studio 2012中启用WebForms网站项目(不是Web应用程序项目)中的实体框架?

编辑1:我正在使用框架4.0。我已经使用包管理器控制台安装了实体框架5.0。当在包管理器控制台中执行Enable-Migrations时，会抛出错误。

PM> enable-migrations
System.ArgumentException: The parameter is incorrect. (Exception from HRESULT: 0x80070057 (E_INVALIDARG))
Server stack trace: 
   at EnvDTE.Properties.Item(Object index)
   at System.Runtime.Remoting.Messaging.StackBuilderSink._PrivateProcessMessage(IntPtr md, Object[] args, Object server, Object[]& outArgs)
   at System.Runtime.Remoting.Messaging.StackBuilderSink.SyncProcessMessage(IMessage msg)
Exception rethrown at [0]: 
   at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
   at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
   at EnvDTE.Properties.Item(Object index)
   at System.Data.Entity.Migrations.Extensions.ProjectExtensions.GetPropertyValue[T](Project project, String propertyName)
   at System.Data.Entity.Migrations.MigrationsDomainCommand.GetFacade(String configurationTypeName)
   at System.Data.Entity.Migrations.EnableMigrationsCommand.FindContextToEnable(String contextTypeName)
   at System.Data.Entity.Migrations.EnableMigrationsCommand.<>c__DisplayClass2.<.ctor>b__0()
   at System.Data.Entity.Migrations.MigrationsDomainCommand.Execute(Action command)
The parameter is incorrect. (Exception from HRESULT: 0x80070057 (E_INVALIDARG))

Answer 1

请检查是否已安装实体框架。如果没有，请在NuGet上获取EF Runtime Available

查看以下链接获取Nuget和示例应用程序