sql-server - WCF：提供程序未返回ProviderManifestToken字符串

我刚收到这个错误，我想我会分享它，以便其他人不花一个小时试图弄清楚出了什么问题。我有SQL Server 2008 Express和WCF服务，工作正常。突然间它停止了工作。这是错误消息

服务器在处理请求时遇到错误。例外   消息是'提供者没有返回ProviderManifestToken   串。'。请参阅服务器日志以获取更多详异常堆栈跟踪   是：

在   System.Data.Common.DbProviderServices.GetProviderManifestToken（的DbConnection   连接）   System.Data.Entity.ModelConfiguration.Utilities.DbConnectionExtensions.GetProviderInfo（的DbConnection   连接，DbProviderManifest＆amp; providerManifest）at   System.Data.Entity.DbModelBuilder.Build（的DbConnection   providerConnection）   System.Data.Entity.Internal.LazyInternalContext.CreateModel（LazyInternalContext   internalContext）at   System.Data.Entity.Internal.RetryLazy 2.GetValue(TInput input) at System.Data.Entity.Internal.LazyInternalContext.InitializeContext() at System.Data.Entity.Internal.InternalContext.Initialize() at System.Data.Entity.Internal.LazyInternalContext.get_ObjectContext() at System.Data.Entity.DbContext.System.Data.Entity.Infrastructure.IObjectContextAdapter.get_ObjectContext() at lambda_method(Closure , Object ) at System.Data.Services.Providers.DbContextHelper.GetObjectContext(Object o) at System.Data.Services.Caching.MetadataCache 1.TryLookup（类型   serviceType，Object dataContextInstance）at   System.Data.Services.Providers.BaseServiceProvider.LoadMetadata（）at   System.Data.Services.DataService 1.CreateMetadataAndQueryProviders(IDataServiceMetadataProvider& metadataProviderInstance, IDataServiceQueryProvider& queryProviderInstance, BaseServiceProvider& builtInProvider, Object& dataSourceInstance) at System.Data.Services.DataService 1.CreateProvider（）at   System.Data.Services.DataService 1.EnsureProviderAndConfigForRequest() at System.Data.Services.DataService 1.HandleRequest（）at   System.Data.Services.DataService`1.ProcessRequestForMessage（流   messageBody）在SyncInvokeProcessRequestForMessage（Object，Object []，   对象[]）在   System.ServiceModel.Dispatcher.SyncMethodInvoker.Invoke（对象   实例，对象[]输入，对象[]＆amp;输出）   System.ServiceModel.Dispatcher.DispatchOperationRuntime.InvokeBegin（MessageRpc＆安培;   rpc）at   System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage5（MessageRpc＆安培;   rpc）at   System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage41（MessageRpc＆安培;   rpc）at   System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage4（MessageRpc＆安培;   rpc）at   System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage31（MessageRpc＆安培;   rpc）at   System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage3（MessageRpc＆安培;   rpc）at   System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage2（MessageRpc＆安培;   rpc）at   System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage11（MessageRpc＆安培;   rpc）at   System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage1（MessageRpc＆安培;   rpc）at System.ServiceModel.Dispatcher.MessageRpc.Process（Boolean   isOperationContextSet）

WCF：提供程序未返回ProviderManifestToken字符串

1 个答案: