我的VS2013项目上安装了Entity Framework 6，身份2.0工作正常，当我使用Nuget升级EF6版本，并尝试使用本地MySQL数据库登录网站时，我收到此失败消息，没有其他更改在我的结尾。只升级并运行项目，我有一个项目的副本，并检查了所有的类，模型，AppStart，没有任何变化，所以我无法确定升级版本修改了什么。
为了澄清升级，在升级EF6之前，我升级了所有其他已安装的软件包，并且能够毫无错误地登录到网站，升级的唯一内容是EF6，一旦我这样做，我的项目就失败了。
我还检查了是否有任何影响访问其他数据，使用linq查询我能够从MySQL数据库中的其他表中检索数据并显示在我的视图上，我唯一的问题是当我尝试登录时网站。
第75行：var result = await SignInManager.PasswordSignInAsync（model.UserName，model.Password，model.RememberMe，shouldLockout：false）; 第76行：开关（结果） 第77行：{
堆栈追踪：
[MySqlException（0x80004005）：您的SQL语法有错误;查看与MySQL服务器版本对应的手册，以便在＆＃39; FROM附近使用正确的语法（（SELECT
情况（Extent2。UserId是空）然后（空）ELSE（1）结束＆＃39;在第28行]
MySql.Data.MySqlClient.MySqlStream.ReadPacket（）+383
MySql.Data.MySqlClient.NativeDriver.GetResult（Int32＆amp; affectedRow，Int64＆amp; insertedId）+116
MySql.Data.MySqlClient.Driver.GetResult（Int32 statementId，Int32＆amp; affectedRows，Int64＆amp; insertedId）+54
MySql.Data.MySqlClient.Driver.NextResult（Int32 statementId，Boolean force）+145
MySql.Data.MySqlClient.MySqlDataReader.NextResult（）+1258
MySql.Data.MySqlClient.MySqlCommand.ExecuteReader（CommandBehavior behavior）+2484
MySql.Data.Entity.EFMySqlCommand.ExecuteDbDataReader（CommandBehavior behavior）+58
System.Data.Common.DbCommand.ExecuteDbDataReaderAsync（CommandBehavior behavior，CancellationToken cancellationToken）+176
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess（任务任务）+93
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（任务任务）+52
System.Runtime.CompilerServices.TaskAwaiter 1.GetResult() +24
System.Data.Entity.Utilities.CultureAwaiter 1.GetResult（）+123
System.Data.Entity.Core.EntityClient.Internal.d__c.MoveNext（）+ 447
[EntityCommandExecutionException：执行命令定义时发生错误。有关详细信息，请参阅内部异常。]
System.Data.Entity.Core.EntityClient.Internal.d__c.MoveNext（）+549
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess（任务任务）+93
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（任务任务）+52
System.Runtime.CompilerServices.TaskAwaiter 1.GetResult() +24
System.Data.Entity.Utilities.CultureAwaiter 1.GetResult（）+123
System.Data.Entity.Core.Objects.Internal.d__0 1.MoveNext() +2429
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +93
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +52
System.Runtime.CompilerServices.TaskAwaiter 1.GetResult（）+24
System.Data.Entity.Utilities.CultureAwaiter 1.GetResult() +123
System.Data.Entity.Core.Objects.<ExecuteInTransactionAsync>d__3d 1.MoveNext（）+ 1521
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess（任务任务）+93
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（任务任务）+52
System.Runtime.CompilerServices.TaskAwaiter 1.GetResult() +24
System.Data.Entity.Utilities.CultureAwaiter 1.GetResult（）+123
System.Data.Entity.Core.Objects.d__e.MoveNext（）+1075
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess（任务任务）+93
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（任务任务）+52
System.Runtime.CompilerServices.TaskAwaiter 1.GetResult() +24
System.Data.Entity.Utilities.CultureAwaiter 1.GetResult（）+123
System.Data.Entity.Internal.d__0.MoveNext（）+538
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess（任务任务）+93
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（任务任务）+52
System.Runtime.CompilerServices.TaskAwaiter 1.GetResult() +24
System.Data.Entity.Utilities.CultureAwaiter 1.GetResult（）+66
System.Data.Entity.Infrastructure.d__25 1.MoveNext() +463
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +93
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +52
System.Runtime.CompilerServices.TaskAwaiter 1.GetResult（）+24
Microsoft.AspNet.Identity.CultureAwaiter 1.GetResult() +123
Microsoft.AspNet.Identity.Owin.<PasswordSignInAsync>d__29.MoveNext() +661
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +93
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +52
System.Runtime.CompilerServices.TaskAwaiter 1.GetResult（）+24
ZA2.UI.Controllers.d__2.MoveNext（）在c：\ DOCUMENTS \ Visual Studio 2013 \ Projects \ ZA2（mySQL Identity 2.0）\ ZA2 \ ZA2.UI \ Controllers \ AccountController.cs：75
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess（任务任务）+93
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（任务任务）+52
System.Runtime.CompilerServices.TaskAwaiter.GetResult（）+ 21
System.Threading.Tasks.TaskHelpersExtensions.ThrowIfFaulted（任务任务）+61
System.Web.Mvc.Async.TaskAsyncActionDescriptor.EndExecute（IAsyncResult asyncResult）+114
System.Web.Mvc.Async。＆lt;＆gt; c__DisplayClass37.b__36（IAsyncResult asyncResult）+66
System.Web.Mvc.Async.WrappedAsyncResult 1.CallEndDelegate(IAsyncResult asyncResult) +47
System.Web.Mvc.Async.WrappedAsyncResultBase 1.End（）+136
System.Web.Mvc.Async.AsyncResultWrapper.End（IAsyncResult asyncResult，Object tag）+102
System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod（IAsyncResult asyncResult）+49
System.Web.Mvc.Async.AsyncInvocationWithFilters.b__3d（）+117
System.Web.Mvc.Async。＆lt;＆gt; c__DisplayClass46.b__3f（）+323
System.Web.Mvc.Async。＆lt;＆gt; c__DisplayClass33.b__32（IAsyncResult asyncResult）+44
System.Web.Mvc.Async.WrappedAsyncResult 1.CallEndDelegate(IAsyncResult asyncResult) +47
System.Web.Mvc.Async.WrappedAsyncResultBase 1.End（）+136
System.Web.Mvc.Async.AsyncResultWrapper.End（IAsyncResult asyncResult，Object tag）+102
System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters（IAsyncResult asyncResult）+50
System.Web.Mvc.Async。＆lt;＆gt; c__DisplayClass2b.b__1c（）+72
System.Web.Mvc.Async。＆lt;＆gt; c__DisplayClass21.b__1e（IAsyncResult asyncResult）+185
System.Web.Mvc.Async.WrappedAsyncResult 1.CallEndDelegate(IAsyncResult asyncResult) +42
System.Web.Mvc.Async.WrappedAsyncResultBase 1.End（）+133
System.Web.Mvc.Async.AsyncResultWrapper.End（IAsyncResult asyncResult，Object tag）+56
System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction（IAsyncResult asyncResult）+40
System.Web.Mvc.Controller.b__1d（IAsyncResult asyncResult，ExecuteCoreState innerState）+34
System.Web.Mvc.Async.WrappedAsyncVoid 1.CallEndDelegate(IAsyncResult asyncResult) +70
System.Web.Mvc.Async.WrappedAsyncResultBase 1.End（）+139
System.Web.Mvc.Async.AsyncResultWrapper.End（IAsyncResult asyncResult，Object tag）+59
System.Web.Mvc.Async.AsyncResultWrapper.End（IAsyncResult asyncResult，Object tag）+40
System.Web.Mvc.Controller.EndExecuteCore（IAsyncResult asyncResult）+44
System.Web.Mvc.Controller.b__15（IAsyncResult asyncResult，Controller controller）+39
System.Web.Mvc.Async.WrappedAsyncVoid 1.CallEndDelegate(IAsyncResult asyncResult) +62
System.Web.Mvc.Async.WrappedAsyncResultBase 1.End（）+139
System.Web.Mvc.Async.AsyncResultWrapper.End（IAsyncResult asyncResult，Object tag）+59
System.Web.Mvc.Async.AsyncResultWrapper.End（IAsyncResult asyncResult，Object tag）+40
System.Web.Mvc.Controller.EndExecute（IAsyncResult asyncResult）+39
System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute（IAsyncResult asyncResult）+39
System.Web.Mvc.MvcHandler.b__5（IAsyncResult asyncResult，ProcessRequestState innerState）+39
System.Web.Mvc.Async.WrappedAsyncVoid 1.CallEndDelegate(IAsyncResult asyncResult) +70
System.Web.Mvc.Async.WrappedAsyncResultBase 1.End（）+139
System.Web.Mvc.Async.AsyncResultWrapper.End（IAsyncResult asyncResult，Object tag）+59
System.Web.Mvc.Async.AsyncResultWrapper.End（IAsyncResult asyncResult，Object tag）+40
System.Web.Mvc.MvcHandler.EndProcessRequest（IAsyncResult asyncResult）+40
System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest（IAsyncResult result）+38
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute（）+9514928
System.Web.HttpApplication.ExecuteStep（IExecutionStep step，Boolean＆amp; completedSynchronously）+155
答案 0 :(得分：0)
将项目升级到EntityFramework 6.1.2后，您会从MySQL收到此错误。 EntityFramework 6.1.2没有生成使用多个Include方法的MySQL Linq查询执行的正确SQL语句。您可以在https://entityframework.codeplex.com/workitem/2673
查看错误详情从EntityFramework 6.1.2降级到EntityFramework 6.1.1将解决您的问题。
以下是从EF 6.1.2降级到EF 6.1.1所需的步骤：
在VS 2013中打开包管理器并执行以下命令：
Update-Package EntityFramework -Version 6.1.1
作为替代测试解决方案，您可以从左侧的下载按钮下载EntityFramework 6.1.1 nuget package http://pierandev.com/feeds/Default/EntityFramework/6.1.1?redirectIfNotFound=n，并使用7-zip或替代zip提取器打开下载的文件，然后替换您现有的EntityFramework 6.1.2使用EntityFramework 6.1.1 dll从nuget包文件中提取dll。