When I have a child .ASCX control that needs to affect something in the parent page I'm not completely sure how I am supposed to handle the event flow in the case where I need to update something in the parent page.When I have a child .ASCX control that needs to
阅读背景：
当子ASCX控件需要触发更改时，更新ASPX页面的最佳方法是什么？
来源：互联网
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