如何获得的UpdatePanel的这启动了回发的ID [英] How to get the id of Updatepanel which initiated a postback
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问题描述
您好我需要拦截后uDate公司面板异步回发的服务器回调，并确定哪些面板发起请求。在code是pretty简单：
Hi I need to intercept server callback after udate panel async post back and determine which panel initiated the request. The code is pretty simple:
Sys.WebForms.PageRequestManager.getInstance().add_pageLoaded(InterceptUpdateCallback);
function InterceptUpdateCallback(sender, args)
{
var updatedPanels = args.get_panelsUpdated();
for (idx = 0; idx < updatedPanels.length; idx++) {
if (updatedPanels[idx].id == "myUpdatePanel") {
StartSmth();
break;
}
}
}
和它的工作原理时，UpdatePanel的不是另一个UpdatePanel内。但是，当它是另一种的UpdatePanel updatedPanels [IDX] .ID内部有父UpdatePanel的ID。所以，我怎么能得到的UpdatePanel的其中发起请求（内部的UpdatePanel）的ID？感谢名单
And it works when UpdatePanel is not inside another UpdatePanel. But when it is inside another UpdatePanel updatedPanels[idx].id has parent Updatepanel id. So how can I get the id of UpdatePanel which initiated the request (the inner UpdatePanel)? Thanx
推荐答案
在这里你去：
function InterceptUpdateCallback(sender, args) {
if (sender._postBackSettings)
alert(sender._postBackSettings.panelID);
else
alert('first load');
}
更新：
<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
protected void LinkButtons_Click(object sender, EventArgs e)
{
LabelMain.Text = LabelSub1.Text = LabelSub2.Text = LabelSub3.Text = string.Format("{0} Updated By {1}", DateTime.Now, ((Control)sender).ID);
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<style type="text/css">
body { font-family: Tahoma;}
fieldset { padding: 15px; }
fieldset a
{
float: right;
clear: none;
display: block;
margin: 10px;
}
fieldset span
{
display: block;
margin-top: 20px;
margin-bottom: 20px;
}
</style>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server" />
<script type="text/javascript">
function pageLoaded(sender, args) {
if (sender._postBackSettings) {
var panelId = sender._postBackSettings.panelID.split('|')[0];
if (panelId == sender._scriptManagerID) {
var updatedPanels = args.get_panelsUpdated();
var affectedPanels = "Affected Panels:\n";
for(var x=0;x<updatedPanels.length;x++)
affectedPanels+= updatedPanels[x].id + "\n";
alert("Request initiated by ScriptManager\n\nMight be an async trigger, or child of an update panel with children as triggers set to false.\n\n"+affectedPanels);
}
else
alert("Request initiated by: " + panelId);
}
}
Sys.WebForms.PageRequestManager.getInstance().add_pageLoaded(pageLoaded);
</script>
<asp:LinkButton ID="UpdateMain" runat="server" Text="UpdateMain" OnClick="LinkButtons_Click"></asp:LinkButton>,
<asp:LinkButton ID="UpdateSub1" runat="server" Text="UpdateSub1" OnClick="LinkButtons_Click"></asp:LinkButton>,
<asp:LinkButton ID="UpdateSub2" runat="server" Text="UpdateSub2" OnClick="LinkButtons_Click"></asp:LinkButton>,
<asp:LinkButton ID="UpdateSub3" runat="server" Text="UpdateSub3" OnClick="LinkButtons_Click"></asp:LinkButton>
<br />
<br />
<asp:UpdatePanel ID="Main" runat="server" ChildrenAsTriggers="false" UpdateMode="Conditional">
<ContentTemplate>
<fieldset>
<asp:LinkButton ID="LinkButton1" runat="server" Text="LinkButton1" OnClick="LinkButtons_Click"></asp:LinkButton>
<legend>Main - Update Mode:Conditional, Children As Triggers:False</legend>
<asp:Label ID="LabelMain" runat="server" Text="LabelMain"></asp:Label>
<asp:UpdatePanel ID="Sub1" runat="server" UpdateMode="Always" ChildrenAsTriggers="true">
<ContentTemplate>
<fieldset>
<asp:LinkButton ID="LinkButton2" runat="server" Text="LinkButton2" OnClick="LinkButtons_Click"></asp:LinkButton>
<legend>Sub1 - Update Mode:Always, Children As Triggers:True</legend>
<asp:Label ID="LabelSub1" runat="server" Text="LabelSub1"></asp:Label>
<asp:UpdatePanel ID="Sub2" runat="server" UpdateMode="Always" ChildrenAsTriggers="true">
<ContentTemplate>
<fieldset>
<asp:LinkButton ID="LinkButton3" runat="server" Text="LinkButton3" OnClick="LinkButtons_Click"></asp:LinkButton>
<legend>Sub2 - Update Mode:Always, Children As Triggers:True</legend>
<asp:Label ID="LabelSub2" runat="server" Text="LabelSub2"></asp:Label>
</fieldset>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="UpdateSub2" />
</Triggers>
</asp:UpdatePanel>
</fieldset>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="UpdateSub1" />
</Triggers>
</asp:UpdatePanel>
<asp:UpdatePanel ID="Sub3" runat="server" ChildrenAsTriggers="false" UpdateMode="Conditional">
<ContentTemplate>
<fieldset>
<asp:LinkButton ID="LinkButton4" runat="server" Text="LinkButton4" OnClick="LinkButtons_Click"></asp:LinkButton>
<legend>Sub3 - Update Mode:Conditional, Children As Triggers:False</legend>
<asp:Label ID="LabelSub3" runat="server" Text="LabelSub3"></asp:Label>
</fieldset>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="UpdateSub3" />
</Triggers>
</asp:UpdatePanel>
</fieldset>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="UpdateMain" />
</Triggers>
</asp:UpdatePanel>
</form>
</body>
</html>
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