How To Find Controls on GridView RowCommand Event

 
  protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
    {
       Control ctrl = e.CommandSource as Control;  
       if (ctrl != null)
       {
           GridViewRow gvRow = ctrl.Parent.NamingContainer as GridViewRow; 
           Label slno = (Label)gvRow.FindControl("slno");  // Find Your Control here
           TextBox txtno = (TextBox)gvRow.FindControl("txtno");  // Find Your Control here
           // Your work start here
       }
    }