Zapisałem według rady treść błędu. Pojawia się on przy pierwszej próbie połączenia z bazą danych. Oto treść błędu exception:
System.Data.SqlClient.SqlException (0x80131904): Wystąpił błąd związany z siecią lub wystąpieniem podczas ustanawiania połączenia z serwerem programu SQL Server. Nie można odnaleźć serwera lub jest on niedostępny. Sprawdź, czy nazwa wystąpienia jest poprawna i czy konfiguracja serwera programu SQL Server zezwala na połączenia zdalne. (provider: SQL Network Interfaces, error: 50 - Wystąpił błąd programu Local Database Runtime. Unexpected error occurred inside a LocalDB instance API method call. See the Windows Application event log for error details.
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w System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, SqlCredential credential, Object providerInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString userConnectionOptions, SessionData reconnectSessionData, DbConnectionPool pool, String accessToken, Boolean applyTransientFaultHandling)
w System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection, DbConnectionOptions userOptions)
w System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnectionPool pool, DbConnection owningObject, DbConnectionOptions options, DbConnectionPoolKey poolKey, DbConnectionOptions userOptions)
w System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection)
w System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection)
w System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection)
w System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection) w System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource
1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection)
w System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource1 retry, DbConnectionOptions userOptions) w System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource
1 retry, DbConnectionOptions userOptions)
w System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource1 retry) w System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource
1 retry)
w System.Data.SqlClient.SqlConnection.Open()
w DetalHandel.DataBase.GetSettings() w C:\Users\Pracownik\OneDrive\Programowanie\DetalHandel\DetalHandel\DataBase.cs:wiersz 242
ClientConnectionId:00000000-0000-0000-0000-000000000000
Error Number:-1983577848,State:0,Class:20