sqlconnection

问题 I know this is a bit vague, but I'm not being able to pinpoint the issue. When I run the a bit of code against a local database it runs fine. When I use a remote database I get an error. It occurs midway of the program execution. The DBup upgrade runs, and then a manual query fails with this exception: System.Data.SqlClient.SqlException (0x80131904): Resetting the connection results in a different state than the initial login. The login fails. Login failed for user 'sa'. I'm creating

问题 Can't connect to a MS SQL Server 2017 Express from dotnet core 2.2 console application. Checked Server Configuration as in Connection to SQL Server Works Sometimes I have installed a new Microsoft SQL Server 2017 Express. Then tested the connection to this server with a console application (under .Net Framework 4.7.1). Works!. Then I created a console application under Dot Net Core 2.2. Installed NuGet package System.Data.SqlClient and tried connect to the sql server using the same connection

问题 SqlDataReader rdr = null; con = new SqlConnection(objUtilityDAL.ConnectionString); using (SqlCommand cmd = con.CreateCommand()) { try { if (con.State != ConnectionState.Open) con.Open(); cmd.CommandType = CommandType.StoredProcedure; cmd.Parameters.Add(Parameter); cmd.CommandText = _query; rdr = cmd.ExecuteReader(); } catch (Exception ex) { throw ex; } } In this above code, sqlconnection is opened inside the managed code. Hence, will the connection object be disposed automatically upon ending

问题 I've successfully installed Openstack Devstack pike on my Ubuntu 16.04 by following this link: https://www.mirantis.com/blog/how-to-install-openstack-on-your-local-machine-using-devstack/. when i tried to create an instance i got No sql_connection parameter is established as an error. I've checked /etc/nova/nova.conf and database configuration was as following: [database] connection = mysql+pymysql://root:mypassword@127.0.0.1/nova_cell0?charset=utf8 [api_database] connection = mysql+pymysql:/

问题 Because SqlCommand implements IDisposable , I would normally approach an ADO query as follows. using (SqlConnection connection = new SqlConnection(connectionString)) using (SqlCommand command = new SqlCommand(query, connection)) { // Execute command, etc. here } However, what if I need to execute multiple commands during a single connection? Do I really need a new using block for each command? The examples I found from Microsoft don't use a using block for SqlCommand s (or even call Dispose()

来源： https://stackoverflow.com/questions/25253078/sqlconnection-pool-size-and-active-connection-count-in-c-sharp

来源： https://stackoverflow.com/questions/25253078/sqlconnection-pool-size-and-active-connection-count-in-c-sharp

来源： https://stackoverflow.com/questions/25253078/sqlconnection-pool-size-and-active-connection-count-in-c-sharp

来源： https://stackoverflow.com/questions/25253078/sqlconnection-pool-size-and-active-connection-count-in-c-sharp

来源： https://stackoverflow.com/questions/63726424/system-data-sqlclient-sqlexception-after-create-alter-print