如何确定哪个触发器触发了我的更新面板？
我有一个更新面板和触发它的按钮列表。我需要某种方法来找出当加载方法（由触发器引起）关闭时按下了哪个按钮，但我无法弄清楚。发送者不会投射到触发器中，而是投射到更新面板本身。
我需要根据按下的按钮执行一些操作。
有什么建议吗？
我正在使用 ASP.NET / C#
<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional" OnLoad="LocationList_Load">
<Triggers>
<asp:AsyncPostBackTrigger ControlID="btnLocMiddleEast" />
<asp:AsyncPostBackTrigger ControlID="btnLocUSA" />
<asp:AsyncPostBackTrigger ControlID="btnLocNewZealand" />
<asp:AsyncPostBackTrigger ControlID="btnLocAustralia" />
<asp:AsyncPostBackTrigger ControlID="btnLocEurope" />
<asp:AsyncPostBackTrigger ControlID="btnLocRepublicOfIreland" />
<asp:AsyncPostBackTrigger ControlID="btnLocNorthernIreland" />
<asp:AsyncPostBackTrigger ControlID="btnLocWales" />
<asp:AsyncPostBackTrigger ControlID="btnLocScotland" />
I have an update panel and a list of buttons that trigger it. I need some way to find out which button was pressed when the load method (which is caused by the triggers) goes off, but I can't figure it out. Sender doesn't cast into the trigger, but the update panel itself.
I need to perform some action based on which button was pressed.
Any advice?
I'm using ASP.NET / C#
<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional" OnLoad="LocationList_Load">
<Triggers>
<asp:AsyncPostBackTrigger ControlID="btnLocMiddleEast" />
<asp:AsyncPostBackTrigger ControlID="btnLocUSA" />
<asp:AsyncPostBackTrigger ControlID="btnLocNewZealand" />
<asp:AsyncPostBackTrigger ControlID="btnLocAustralia" />
<asp:AsyncPostBackTrigger ControlID="btnLocEurope" />
<asp:AsyncPostBackTrigger ControlID="btnLocRepublicOfIreland" />
<asp:AsyncPostBackTrigger ControlID="btnLocNorthernIreland" />
<asp:AsyncPostBackTrigger ControlID="btnLocWales" />
<asp:AsyncPostBackTrigger ControlID="btnLocScotland" />
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检查我对这个问题的回答：
基本上，您应该检查 ScriptManager.AsyncPostBackSourceElementID 用于触发器。
Check the answer I gave to this question:
Basically you should check the ScriptManager.AsyncPostBackSourceElementID for the trigger.
通常，我只会为每个按钮创建一个单独的 Click 事件处理程序，然后编写应在每个事件处理程序中触发的特定代码。
Normally I would just create an individual Click event handler for each button, and then write the specific code that should be triggered in each event handler.
如果您正在调试，可以检查堆栈跟踪。
If you're debugging, you can check the stack trace.