Hallo,
habe den SQL-Server deinstalliert und dann vom Link neu installiert (LocalDB).
Hier die Version:
sqllocaldb v
Microsoft SQL Server 2017 (14.0.1000.169)
Das Log sieht wie folgt aus:
26.07.2020 10:16:40 - LOG -
26.07.2020 10:16:40 - LOG - ------------------------------------ starting up ------------------------------------
26.07.2020 10:16:40 - LOG -
26.07.2020 10:16:40 - LOG - SQL-Instances: MSSQLLocalDB;v17.0;
26.07.2020 10:16:41 - LOG - QC3x 3.0.0.6, Intel(R) Core(TM) i7-9700 CPU @ 3.00GHz, 3000, 16124, 1920x1080, MS Win 10 Pro (64-bit)
26.07.2020 10:16:41 - LOG - Getting File_Path
26.07.2020 10:16:43 - EXC - Login failed for user 'DESKTOP\user'. : bei 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, SqlAuthenticationProviderManager sqlAuthProviderManager)
bei System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection, DbConnectionOptions userOptions)
bei System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnectionPool pool, DbConnection owningObject, DbConnectionOptions options, DbConnectionPoolKey poolKey, DbConnectionOptions userOptions)
bei System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection)
bei System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection)
bei System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection)
bei System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection)
bei System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection)
bei System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)
bei System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource`1 retry)
bei System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry)
bei System.Data.SqlClient.SqlConnection.Open()
bei QC3x.Start.Get_FilePath()