“/”应用程序中的服务器错误。

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[Win32Exception (0x80004005): 找不到网络路径。]

[SqlException (0x80131904): 在与 SQL Server 建立连接时出现与网络相关的或特定于实例的错误。未找到或无法访问服务器。请验证实例名称是否正确并且 SQL Server 已配置为允许远程连接。 (provider: Named Pipes Provider, error: 40 - 无法打开到 SQL Server 的连接)]
   System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection) +356
   System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection) +117
   System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection) +267
   System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions) +318
   System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource`1 retry) +132
   System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry) +246
   System.Data.SqlClient.SqlConnection.Open() +122
   System.Data.Entity.Infrastructure.Interception.InternalDispatcher`1.Dispatch(TTarget target, Action`2 operation, TInterceptionContext interceptionContext, Action`3 executing, Action`3 executed) +104
   System.Data.Entity.Infrastructure.Interception.DbConnectionDispatcher.Open(DbConnection connection, DbInterceptionContext interceptionContext) +509
   System.Data.Entity.SqlServer.<>c__DisplayClass33.b__32() +567
   System.Data.Entity.SqlServer.<>c__DisplayClass1.b__0() +15
   System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute(Func`1 operation) +238
   System.Data.Entity.SqlServer.SqlProviderServices.UsingMasterConnection(DbConnection sqlConnection, Action`1 act) +926
   System.Data.Entity.SqlServer.SqlProviderServices.CreateDatabaseFromScript(Nullable`1 commandTimeout, DbConnection sqlConnection, String createDatabaseScript) +124
   System.Data.Entity.SqlServer.SqlProviderServices.DbCreateDatabase(DbConnection connection, Nullable`1 commandTimeout, StoreItemCollection storeItemCollection) +222
   System.Data.Entity.Migrations.Utilities.DatabaseCreator.Create(DbConnection connection) +135
   System.Data.Entity.Migrations.DbMigrator.EnsureDatabaseExists(Action mustSucceedToKeepDatabase) +175
   System.Data.Entity.Migrations.DbMigrator.Update(String targetMigration) +116
   System.Data.Entity.Internal.DatabaseCreator.CreateDatabase(InternalContext internalContext, Func`3 createMigrator, ObjectContext objectContext) +121
   System.Data.Entity.Database.Create(DatabaseExistenceState existenceState) +293
   System.Data.Entity.CreateDatabaseIfNotExists`1.InitializeDatabase(TContext context) +187
   System.Data.Entity.Internal.InternalContext.PerformInitializationAction(Action action) +72
   System.Data.Entity.Internal.InternalContext.PerformDatabaseInitialization() +483
   System.Data.Entity.Internal.RetryAction`1.PerformAction(TInput input) +177
   System.Data.Entity.Internal.LazyInternalContext.InitializeDatabaseAction(Action`1 action) +274
   System.Data.Entity.Internal.InternalContext.GetEntitySetAndBaseTypeForType(Type entityType) +20
   System.Data.Entity.Internal.Linq.InternalSet`1.Initialize() +77
   System.Data.Entity.Internal.Linq.InternalSet`1.GetEnumerator() +21
   PowerEasy.Modules.DataCollection.DataCollectionInit.PostApplicationStart() +1294

[TargetInvocationException: 调用的目标发生了异常。]
   System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor) +0
   System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments) +260
   System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) +146
   WebActivatorEx.BaseActivationMethodAttribute.InvokeMethod() +102
   WebActivatorEx.ActivationManager.RunActivationMethods(Boolean designerMode) +718
   WebActivatorEx.StartMethodCallingModule.Init(HttpApplication context) +125
   System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers) +618
   System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context) +172
   System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +402
   System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +343

[HttpException (0x80004005): 调用的目标发生了异常。]
   System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +539
   System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +125
   System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +731