我有一些code对我的ASP网页看起来是这样的：

I have some code on my ASP page which looks like this:

<asp:UpdatePanel runat="server" id="updatepanel1" UpdateMode="Conditional" onload="updatepanel1_Load" ChildrenAsTriggers="false">
<ContentTemplate>
<asp:HiddenField id="sendingRequest" runat="server" Value="0" />
....
</ContentTemplate>
</asp:UpdatePanel>

我也有我的网页，其中做到这一点，一些javascript触发的UpdatePanel的更新：

I also have some javascript on my page which does this, to trigger the update of the updatepanel:

var sendingRequest = document.getElementById("<%=sendingRequest.ClientID%>");
sendingRequest.value = "1";
__doPostBack('<%= updatepanel1.ClientID %>', '');

一切正常，到现在为止，但在我updatepanel1_Load情况下，我尝试将该值设置为0：

Everything works fine up to now, but in my updatepanel1_Load event, I try to set the value back to "0" :

sendingRequest.Value = "0";

此值永远不会被更新，并重新设置为0的客户机上的回发后，我想不通为什么！

This value never gets updated and set back to 0 on the client after the postback, and I can't figure out why!

谁能帮助？谢谢

推荐答案

如果您有任何问题，一个隐藏字段，你可以使用文本框代替。隐藏与CSS的文本框（显示：无; ）来达到类似的效果，以隐藏字段。它不完全是pretty的，但它的一个可行的解决办法。

If you're having problems with a hidden field, you could use a TextBox instead. Hide the textbox with css (display: none;) to achieve similar results to a hidden field. Its not exactly pretty, but its a workable workaround.