ID为控制找不到在UpdatePanel的触发器 [英] A control with ID could not be found for the trigger in UpdatePanel

问题描述

我有一个更新面板具有条件设置为false ChildrenAsTriggers的的UpdateMode。我只想要一些控件导致异步回发：

I have an update panel that has UpdateMode of Conditional and ChildrenAsTriggers set to false. I only want a few controls to cause an asynchronous postback:

<asp:UpdatePanel ID="updPnlMain" runat="server" UpdateMode="Conditional" ChildrenAsTriggers="false">
<ContentTemplate>

      // ...
      <asp:Repeater ID="rptListData" runat="server">
          <ItemTemplate>
              <asp:Button ID="btnAddSomething" runat="server" OnClick="btnAddSomething_Click" />
          </ItemTemplate>
      </asp:Repeater>
      // ...
</ContentTemplate>
<Triggers>
    <asp:AsyncPostBackTrigger ControlID="btnAddSomething" EventName="Click" />
</Triggers>
</asp:UpdatePanel>

我收到以下错误，当我尝试加载该页面：

I am getting the following error when I try and load this page:

A control with ID 'btnAddSomething' could not be found for the trigger in UpdatePanel 'updPnlMain'.

由于我btnAddSomething控制是一个中继器，可能不会有马上它的作用就像是不存在的。我怎样才能解决这个？

Since my btnAddSomething control is in a repeater and might not be there right away it acts like it is nonexistent. How can I get around this?

推荐答案

由于您控制在 Repeater控件和超出范围触发器集合。顺便说一句，你不需要添加触发器，因为你的按钮控制已处于的UpdatePanel ，它将更新时单击该按钮。

Because your control is in repeater control and is out of scope to Trigger collection. By the way you don't need to add trigger because your button control is already in UpdatePanel, it will update when you click the button.

编辑：有解决方案，如果你真的想更新updPnlMain的UpdatePanel。你可以把anohter的UpdatePanel，并把你的按钮，在面板上。例如，

There is solution if you really want to update your updPnlMain updatepanel. You can put anohter updatepanel and put your button in that panel. e.g.

<asp:UpdatePanel ID="updButton" runat="server" UpdateMode="Conditional">
  <asp:Button ID="btnAddSomething" runat="server" OnClick="btnAddSomething_Click" />
</ContentTemplate>

然后只需调用 updPnlMain.Update（）;在 btnAddSomething_Click 事件方法

and then simply call the updPnlMain.Update(); method in btnAddSomething_Click event.

这实际上将你在找什么目前：）

It will actually do what you are looking currently :)

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