รบกวนสอบถามวิธีแก้ไข errror หน่อยค่ะ ต้องแก้ไขไขอย่างไรคะ
Unhandled exception has occurred in your application. If you click Continue, the application will ignore this error and attempt to continue.
If you click Quit, the application will close immediately.
A network-related or instance-specific error occurred while establishing a connection to SQL Server.
The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections.
(provider: Named Pipes Provider, error:40 - Could not open a connection to SQL Server).
Load balance : Server 01
