ASP.Net错误26错误定位指定的服务器/实例

Question

我无法弄清楚我在做什么错。 我已经尝试了所有方法：我的连接字符串，关闭了防火墙，允许远程连接，但是我仍然不断收到此错误：

建立与SQL Server的连接时发生与网络相关或特定于实例的错误。 服务器未找到或无法访问。 验证实例名称正确，并且已将SQL Server配置为允许远程连接。 （提供者：SQL网络接口，错误：26-指定服务器/实例时出错）

[SqlException（0x80131904）：建立与SQL Server的连接时发生与网络相关或特定于实例的错误。 服务器未找到或无法访问。 验证实例名称正确，并且已将SQL Server配置为允许远程连接。 （提供者：SQL网络接口，错误：26-错误指定服务器/实例的位置）] System.Data.SqlClient.SqlInternalConnection.OnError（SqlException异常，布尔值breakConnection，操作1 wrapCloseInAction) +6568558 System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose) +717 System.Data.SqlClient.TdsParser.Connect(ServerInfo serverInfo, SqlInternalConnectionTds connHandler, Boolean ignoreSniOpenTimeout, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity, Boolean withFailover) +6595000 System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean ignoreSniOpenTimeout, TimeoutTimer timeout, Boolean withFailover) +219 System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString connectionOptions, SqlCredential credential, TimeoutTimer timeout) +6597311 System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(TimeoutTimer timeout, SqlConnectionString connectionOptions, SqlCredential credential, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance) +6597891 System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, SqlCredential credential, Object providerInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString userConnectionOptions, SessionData reconnectSessionData) +942 System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection, DbConnectionOptions userOptions) +1162 System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnectionPool pool, DbConnection owningObject, DbConnectionOptions options, DbConnectionPoolKey poolKey, DbConnectionOptions userOptions) +72 System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection) +6601145 System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection) +103 System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection) +2102 System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource 1 wrapCloseInAction) +6568558 System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose) +717 System.Data.SqlClient.TdsParser.Connect(ServerInfo serverInfo, SqlInternalConnectionTds connHandler, Boolean ignoreSniOpenTimeout, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity, Boolean withFailover) +6595000 System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean ignoreSniOpenTimeout, TimeoutTimer timeout, Boolean withFailover) +219 System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString connectionOptions, SqlCredential credential, TimeoutTimer timeout) +6597311 System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(TimeoutTimer timeout, SqlConnectionString connectionOptions, SqlCredential credential, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance) +6597891 System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, SqlCredential credential, Object providerInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString userConnectionOptions, SessionData reconnectSessionData) +942 System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection, DbConnectionOptions userOptions) +1162 System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnectionPool pool, DbConnection owningObject, DbConnectionOptions options, DbConnectionPoolKey poolKey, DbConnectionOptions userOptions) +72 System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection) +6601145 System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection) +103 System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection) +2102 System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource 1 wrapCloseInAction) +6568558 System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose) +717 System.Data.SqlClient.TdsParser.Connect(ServerInfo serverInfo, SqlInternalConnectionTds connHandler, Boolean ignoreSniOpenTimeout, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity, Boolean withFailover) +6595000 System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean ignoreSniOpenTimeout, TimeoutTimer timeout, Boolean withFailover) +219 System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString connectionOptions, SqlCredential credential, TimeoutTimer timeout) +6597311 System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(TimeoutTimer timeout, SqlConnectionString connectionOptions, SqlCredential credential, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance) +6597891 System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, SqlCredential credential, Object providerInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString userConnectionOptions, SessionData reconnectSessionData) +942 System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection, DbConnectionOptions userOptions) +1162 System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnectionPool pool, DbConnection owningObject, DbConnectionOptions options, DbConnectionPoolKey poolKey, DbConnectionOptions userOptions) +72 System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection) +6601145 System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection) +103 System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection) +2102 System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource 1重试，DbConnectionOptions userOptions，DbConnectionInternal＆连接）+116 System.Data.ProviderBase.DbConnectionFactory.TryGetConnection（DbConnection owningConnection，Tas kCompletionSource 1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection) +1079 System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource 1重试，DbConnectionOptions userOptions）+6605639 System（In。 1 retry) +233 System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource TaskCompletionSource 1 retry) +233 System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource重试1 retry) +233 System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource 1）+278 System.Data.SqlClient.SqlConnection.Open 1.Dispatch(TTarget target, Action ）+239 System.Data.Entity.Infrastructure.Interception.InternalDispatcher 1.Dispatch(TTarget target, Action 2操作，TInterceptionContext拦截上下文， 3 executing, Action操作3 executing, Action 3）+207 System.Data.Entity.Infrastructure.Interception.DbConnectionDispatcher.Open（DbConnection连接，DbInterceptionContext拦截上下文）+438 System.Data.Entity.SqlServer。 <> c__DisplayClass33.b__32（）+582 System.Data.Entity.SqlServer。<> c__DisplayClass1.b__0（）+15 System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute（功能1 operation) +263 System.Data.Entity.SqlServer.SqlProviderServices.UsingMasterConnection(DbConnection sqlConnection, Action 1行动）+749 System.Data。 Entity.SqlServer.SqlProviderServices.DbCreateDatabase（DbConnection连接，可空1 commandTimeout, StoreItemCollection storeItemCollection) +314 System.Data.Entity.Migrations.Utilities.DatabaseCreator.Create(DbConnection connection) +329 System.Data.Entity.Migrations.DbMigrator.EnsureDatabaseExists(Action mustSucceedToKeepDatabase) +230 System.Data.Entity.Internal.DatabaseCreator.CreateDatabase(InternalContext internalContext, Func 3 createMigrator，ObjectContext objectContext）+130 System.Data.Entity.Database.Create（DatabaseExistenceState existState）+267 System.Data.Entity .CreateDatabaseIfNotExists 1.InitializeDatabase(TContext context) +217 System.Data.Entity.Internal.InternalContext.PerformInitializationAction(Action action) +66 System.Data.Entity.Internal.InternalContext.PerformDatabaseInitialization() +596 System.Data.Entity.Internal.RetryAction 1.InitializeDatabase(TContext context) +217 System.Data.Entity.Internal.InternalContext.PerformInitializationAction(Action action) +66 System.Data.Entity.Internal.InternalContext.PerformDatabaseInitialization() +596 System.Data.Entity.Internal.RetryAction （TInput输入）+208 System.Data.Entity.Internal.LazyInternalContext.InitializeDatabaseAction（操作1 action) +263 System.Data.Entity.Internal.InternalContext.GetEntitySetAndBaseTypeForType(Type entityType) +39 System.Data.Entity.Internal.Linq.InternalSet 1.Initialize（） 1.get_InternalContext() +21 System.Data.Entity.Infrastructure.DbQuery System.Data.Entity.Internal.Linq.InternalSet 1.get_InternalContext() +21 System.Data.Entity.Infrastructure.DbQuery 1.System.Linq.IQueryable.get_Provider（）+64 System.Data.Entity.QueryableExtensions.FirstOrDefaultAsync（IQueryable 1 source, Expression 1谓词，CancellationToken cancelledToken）+218系统.Data.Entity.QueryableExtensions.FirstOrDefaultAsync（IQueryable 1 source, Expression 1谓词）+113 Microsoft.AspNet.Identity.d__13.MoveNext（）+229 System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess（任务任务）+144 System.Runtime .CompilerServices.TaskAwaiter.Hand leNonSuccessAndDebuggerNotification（任务任务）+84 Microsoft.AspNet.Identity.d__d.MoveNext（）+455 System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess（任务任务）+144 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（84） System.Runtime.CompilerServices.TaskAwaiter 1.GetResult() +49 Microsoft.AspNet.Identity.AsyncHelper.RunSync(Func 1函数）+235 DaveyMaherFitness.Logic.RoleActions.AddUserAndRole（）+151

[HttpException（0x80004005）：建立与SQL Server的连接时发生与网络相关或特定于实例的错误。 服务器未找到或无法访问。 验证实例名称正确，并且已将SQL Server配置为允许远程连接。 （提供者：SQL网络接口，错误：26-错误指定服务器/实例的位置）] System.Web.HttpApplicationFactory.EnsureAppStartCalledForIntegratedMode（HttpContext上下文，HttpApplication应用）+12601933 System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS（IntPtr appContext，HttpContext上下文，MethodInfo []处理程序）+175 System.Web.HttpApplication.InitSpecial（HttpApplicationState状态，MethodInfo []处理程序，IntPtr appContext，HttpContext上下文）+304 System.Web.HttpApplicationFactory.GetSpecialApplicationInstance（IntPtr appContext，HttpContext上下文）+404 System.Web。 Hosting.PipelineRuntime.InitializeApplication（IntPtr appContext）+475

[HttpException（0x80004005）：建立与SQL Server的连接时发生与网络相关或特定于实例的错误。 服务器未找到或无法访问。 验证实例名称正确，并且已将SQL Server配置为允许远程连接。 （提供者：SQL网络接口，错误：26-错误指定服务器/实例的位置）] System.Web.HttpRuntime.FirstRequestInit（HttpContext上下文）+12618980 System.Web.HttpRuntime.EnsureFirstRequestInit（HttpContext上下文）+159 System.Web.HttpRuntime .ProcessRequestNotificationPrivate（IIS7WorkerRequest wr，HttpContext上下文）+12458597

任何建议将不胜感激，我觉得我只是在忽略一些东西！

Answer 1

这只是说明它无法建立与服务器的连接，并且可能有很多原因。

可能是SQL-SERVER配置的Windows模式身份验证，而您正在尝试sql-server身份验证。 或未为远程连接配置sql-server或使用了错误的凭据。 或更糟糕的是您的连接字符串不正确。

无论如何，我强烈建议在VS中使用“服务器”面板，并在该面板上进行测试连接，这使您更容易找出问题所在。