The TCP/IP connection to the host localhost, port 1433 has failed. Error: "Connection refused: connect. Verify the connection properties, check that an instance of SQL Server is running on the host and accepting TCP/IP connections at the port, and that no firewall is blocking TCP connections to the port.
Controleer uw SQL Server-instelling om TCP/IP-verbindingen te accepteren. Schakel TCP/IP in en start SQL Server opnieuw. Test vervolgens uw code opnieuw.
