无法找到请求的.NET Framework数据提供程序。它可能没有安装。 - 当以下MVC3 asp.net教程 [英] Unable to find the requested .Net Framework Data Provider. It may not be installed. - when following mvc3 asp.net tutorial

问题描述

我下面的ASP.NET MVC 3音乐商店应用程序的教程，但我一直陷在第4部分：<一href=\"http://www.asp.net/mvc/tutorials/mvc-music-store-part-4\">http://www.asp.net/mvc/tutorials/mvc-music-store-part-4.它使告诉我，我没有安装SQL数据提供者的更多信息：

I am following the ASP.NET MVC 3 Music store application tutorial but I keep getting stuck in part 4: http://www.asp.net/mvc/tutorials/mvc-music-store-part-4. It keeps telling me that I do not have the SQL data provider installed:

完全错误：

System.ArgumentException was unhandled by user code
  Message=Unable to find the requested .Net Framework Data Provider.  It may not be installed.
  Source=System.Data
  StackTrace:
       at System.Data.Common.DbProviderFactories.GetFactory(String providerInvariantName)
       at System.Data.Entity.Internal.LazyInternalConnection.TryInitializeFromAppConfig(String name)
       at System.Data.Entity.Internal.LazyInternalConnection.Initialize()
       at System.Data.Entity.Internal.LazyInternalConnection.get_ConnectionHasModel()
       at System.Data.Entity.Internal.LazyInternalContext.InitializeContext()
       at System.Data.Entity.Internal.InternalContext.Initialize()
       at System.Data.Entity.Internal.InternalContext.GetEntitySetAndBaseTypeForType(Type entityType)
       at System.Data.Entity.Internal.Linq.InternalSet`1.Initialize()
       at System.Data.Entity.Internal.Linq.InternalSet`1.GetEnumerator()
       at System.Data.Entity.Infrastructure.DbQuery`1.System.Collections.Generic.IEnumerable<TResult>.GetEnumerator()
       at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
       at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
       at MusicApplication.Controllers.StoreController.Index() in C:\Users\Michelle\documents\visual studio 2010\Projects\MusicApplication\MusicApplication\Controllers\StoreController.cs:line 18
       at lambda_method(Closure , ControllerBase , Object[] )
       at System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters)
       at System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters)
       at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters)
       at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClass15.<InvokeActionMethodWithFilters>b__12()
       at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation)
  InnerException: 

我已经加入了参考System.Data.SqlServerCe - 仍然有同样的错误。任何指导，将是真正的AP preciated

I have added the reference to System.Data.SqlServerCe - still have the same error. Any guidance would be really appreciated

推荐答案

我能够用的NuGet解决Visual Studio 2010中一个类似的问题。

I was able to solve a problem similar to this in Visual Studio 2010 by using NuGet.

转到工具>库软件包管理器>管理的NuGet软件包的解决方案...

Go to Tools > Library Package Manager > Manage NuGet Packages For Solution...

在该对话框中，搜索EntityFramework.SqlServerCompact。你会发现与描述一包允许的SQL Server Compact 4.0与实体框架一起使用。安装该软件包。

In the dialog, search for "EntityFramework.SqlServerCompact". You'll find a package with the description "Allows SQL Server Compact 4.0 to be used with Entity Framework." Install this package.

类似于以下的元素将在你的web.config中插入：

An element similar to the following will be inserted in your web.config:

<entityFramework>
  <defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlCeConnectionFactory, EntityFramework">
    <parameters>
      <parameter value="System.Data.SqlServerCe.4.0" />
    </parameters>
  </defaultConnectionFactory>
</entityFramework>

这篇关于无法找到请求的.NET Framework数据提供程序。它可能没有安装。 - 当以下MVC3 asp.net教程的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！