写事件了吗？
protected void gv_RowEditing(object sender, GridViewEditEventArgs e)
    {
        gv.EditIndex = e.NewEditIndex;
       重新帮定数据;
    }

------解决方案--------------------
探讨

C# code写事件了吗？protectedvoidgv_RowEditing(objectsender, GridViewEditEventArgs e)
    {
        gv.EditIndex=e.NewEditIndex;
       重新帮定数据;
    }