How to use OUTPUT parameter in Stored Procedure

Question

I am new to writing Stored Procedure. So I wrote one with output parameters and want to access the output value, hot to do it.

My Stored Procedure:

A         


        

Answer 1

You need to close the connection before you can use the output parameters. Something like this

con.Close();
MessageBox.Show(cmd.Parameters["@code"].Value.ToString());