Call a stored procedure with parameter in c#

Question

I can do a delete, insert and update in my program and I try to do an insert by call a created stored procedure from my database.

This a button insert I make work

Answer 1

public void myfunction(){
        try
        {
            sqlcon.Open();
            SqlCommand cmd = new SqlCommand("sp_laba", sqlcon);
            cmd.CommandType = CommandType.StoredProcedure;
            cmd.ExecuteNonQuery();
        }
        catch(Exception ex)
        {
            MessageBox.Show(ex.Message);
        }
        finally
        {
            sqlcon.Close();
        }
}