System.Data.SqlClient.SqlException: 建立連接至 SQL Server 時，發生網路相關或執行個體特定的錯誤。找不到或無法存取伺服器。確認執行個名稱是否正確，以及 SQL Server 是否設定為允許遠端連線。 (provider: TCP 提供者, error: 0 - 無法連線，因為目標電腦拒絕連線。)
   於 System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)
   於 System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj)
   於 System.Data.SqlClient.TdsParser.Connect(ServerInfo serverInfo, SqlInternalConnectionTds connHandler, Boolean ignoreSniOpenTimeout, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity, SqlConnection owningObject)
   於 System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, Boolean ignoreSniOpenTimeout, Int64 timerExpire, SqlConnection owningObject)
   於 System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(String host, String newPassword, Boolean redirectedUserInstance, SqlConnection owningObject, SqlConnectionString connectionOptions, Int64 timerStart)
   於 System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection owningObject, SqlConnectionString connectionOptions, String newPassword, Boolean redirectedUserInstance)
   於 System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, Object providerInfo, String newPassword, SqlConnection owningObject, Boolean redirectedUserInstance)
   於 System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection)
   於 System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnection owningConnection, DbConnectionPool pool, DbConnectionOptions options)
   於 System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject)
   於 System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject)
   於 System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject)
   於 System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection)
   於 System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory)
   於 System.Data.SqlClient.SqlConnection.Open()
   於 DXBBS.DataProviders.DataProvider..ctor()