取gridview中textbox的值【C#】

                    
                         
                            
                               
                            
                        
                    
                 

protected void gridView_RowCommand(object sender, GridViewCommandEventArgs e)
        {
          string tbx = ((TextBox)gridView.Rows[Convert.ToInt32(e.CommandArgument)].FindControl("tbx")).Text;
           

        }