Sys.WebForms.PageRequestManager endRequest-Ereignis
Aktualisiert: November 2007
Wird ausgelöst, nachdem ein asynchrones Postback beendet und die Steuerung wieder an den Browser zurückgegeben wurde.
Sys.WebForms.PageRequestManager.getInstance().add_endRequest(endRequestHandler)
Sys.WebForms.PageRequestManager.getInstance().remove_endRequest(endRequestHandler)
Parameter
Ausdruck |
Definition |
|---|---|
endRequestHandler |
Der Name der Handlermethode, die aufgerufen wird. |
Hinweise
Das endRequest-Ereignis wird ausgelöst, nachdem ein asynchrones Postback beendet und die Steuerung wieder an den Browser zurückgegeben wurde. Verwenden Sie dieses Ereignis, um Benutzer zu benachrichtigen oder um Fehler zu protokollieren.
Weitere Informationen über das PageRequestManager-Ereignismodell finden Sie unter Arbeiten mit PageRequestManager-Ereignissen.
Beispiel
Das folgende Beispiel veranschaulicht die Verwendung des endRequest-Ereignisses, um den Benutzer zu benachrichtigen, wenn während der Teilaktualisierung von Seiten ein Fehler aufgetreten ist.
<%@ Page Language="VB" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
Protected Sub ErrorProcessClick_Handler(ByVal sender As Object, ByVal e As EventArgs)
'This handler demonstrates an error condition. In this example
' the server error gets intercepted on the client and an alert is shown.
Dim exc As New ArgumentException()
exc.Data("GUID") = Guid.NewGuid().ToString()
Throw exc
End Sub
Protected Sub SuccessProcessClick_Handler(ByVal sender As Object, ByVal e As EventArgs)
'This handler demonstrates no server side exception.
UpdatePanelMessage.Text = "The asynchronous postback completed successfully."
End Sub
Protected Sub ScriptManager1_AsyncPostBackError(ByVal sender As Object, ByVal e As System.Web.UI.AsyncPostBackErrorEventArgs)
If Not (e.Exception.Data("GUID") Is Nothing) Then
ScriptManager1.AsyncPostBackErrorMessage = e.Exception.Message & _
" When reporting this error use the following ID: " & _
e.Exception.Data("GUID").ToString()
Else
ScriptManager1.AsyncPostBackErrorMessage = _
"The server could not process the request."
End If
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>PageRequestManager endRequestEventArgs Example</title>
<style type="text/css">
body {
font-family: Tahoma;
}
#AlertDiv{
left: 40%; top: 40%;
position: absolute; width: 200px;
padding: 12px;
border: #000000 1px solid;
background-color: white;
text-align: left;
visibility: hidden;
z-index: 99;
}
#AlertButtons{
position: absolute;
right: 5%;
bottom: 5%;
}
</style>
</head>
<body id="bodytag">
<form id="form1" runat="server">
<div>
<asp:ScriptManager ID="ScriptManager1"
OnAsyncPostBackError="ScriptManager1_AsyncPostBackError"
runat="server" />
<script type="text/javascript" language="javascript">
var divElem = 'AlertDiv';
var messageElem = 'AlertMessage';
var bodyTag = 'bodytag';
Sys.WebForms.PageRequestManager.getInstance().add_endRequest(EndRequestHandler);
function ToggleAlertDiv(visString)
{
if (visString == 'hidden')
{
$get(bodyTag).style.backgroundColor = 'white';
}
else
{
$get(bodyTag).style.backgroundColor = 'gray';
}
var adiv = $get(divElem);
adiv.style.visibility = visString;
}
function ClearErrorState() {
$get(messageElem).innerHTML = '';
ToggleAlertDiv('hidden');
}
function EndRequestHandler(sender, args)
{
if (args.get_error() != undefined)
{
var errorMessage = args.get_error().message;
args.set_errorHandled(true);
ToggleAlertDiv('visible');
$get(messageElem).innerHTML = errorMessage;
}
}
</script>
<asp:UpdatePanel runat="Server" UpdateMode="Conditional" ID="UpdatePanel1">
<ContentTemplate>
<asp:Panel ID="Panel1" runat="server" GroupingText="Update Panel">
<asp:Label ID="UpdatePanelMessage" runat="server" />
<br />
Last update:
<%= DateTime.Now.ToString() %>
.
<br />
<asp:Button runat="server" ID="Button1" Text="Submit Successful Async Postback"
OnClick="SuccessProcessClick_Handler" OnClientClick="ClearErrorState()" />
<asp:Button runat="server" ID="Button2" Text="Submit Async Postback With Error"
OnClick="ErrorProcessClick_Handler" OnClientClick="ClearErrorState()" />
<br />
</asp:Panel>
</ContentTemplate>
</asp:UpdatePanel>
<div id="AlertDiv">
<div id="AlertMessage">
</div>
<br />
<div id="AlertButtons" >
<input id="OKButton" type="button" value="OK"
runat="server" onclick="ClearErrorState()" />
</div>
</div>
</div>
</form>
</body>
</html>
<%@ 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 ErrorProcessClick_Handler(object sender, EventArgs e)
{
// This handler demonstrates an error condition. In this example
// the server error gets intercepted on the client and an alert is shown.
Exception exc = new ArgumentException();
exc.Data["GUID"] = Guid.NewGuid().ToString();
throw exc;
}
protected void SuccessProcessClick_Handler(object sender, EventArgs e)
{
// This handler demonstrates no server side exception.
UpdatePanelMessage.Text = "The asynchronous postback completed successfully.";
}
protected void ScriptManager1_AsyncPostBackError(object sender, AsyncPostBackErrorEventArgs e)
{
if (e.Exception.Data["GUID"] != null)
{
ScriptManager1.AsyncPostBackErrorMessage = e.Exception.Message +
" When reporting this error use the following ID: " +
e.Exception.Data["GUID"].ToString();
}
else
{
ScriptManager1.AsyncPostBackErrorMessage =
"The server could not process the request.";
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>PageRequestManager endRequestEventArgs Example</title>
<style type="text/css">
body {
font-family: Tahoma;
}
#AlertDiv{
left: 40%; top: 40%;
position: absolute; width: 200px;
padding: 12px;
border: #000000 1px solid;
background-color: white;
text-align: left;
visibility: hidden;
z-index: 99;
}
#AlertButtons{
position: absolute;
right: 5%;
bottom: 5%;
}
</style>
</head>
<body id="bodytag">
<form id="form1" runat="server">
<div>
<asp:ScriptManager ID="ScriptManager1"
OnAsyncPostBackError="ScriptManager1_AsyncPostBackError"
runat="server" />
<script type="text/javascript" language="javascript">
var divElem = 'AlertDiv';
var messageElem = 'AlertMessage';
var bodyTag = 'bodytag';
Sys.WebForms.PageRequestManager.getInstance().add_endRequest(EndRequestHandler);
function ToggleAlertDiv(visString)
{
if (visString == 'hidden')
{
$get(bodyTag).style.backgroundColor = 'white';
}
else
{
$get(bodyTag).style.backgroundColor = 'gray';
}
var adiv = $get(divElem);
adiv.style.visibility = visString;
}
function ClearErrorState() {
$get(messageElem).innerHTML = '';
ToggleAlertDiv('hidden');
}
function EndRequestHandler(sender, args)
{
if (args.get_error() != undefined)
{
var errorMessage = args.get_error().message;
args.set_errorHandled(true);
ToggleAlertDiv('visible');
$get(messageElem).innerHTML = errorMessage;
}
}
</script>
<asp:UpdatePanel runat="Server" UpdateMode="Conditional" ID="UpdatePanel1">
<ContentTemplate>
<asp:Panel ID="Panel1" runat="server" GroupingText="Update Panel">
<asp:Label ID="UpdatePanelMessage" runat="server" />
<br />
Last update:
<%= DateTime.Now.ToString() %>
.
<br />
<asp:Button runat="server" ID="Button1" Text="Submit Successful Async Postback"
OnClick="SuccessProcessClick_Handler" OnClientClick="ClearErrorState()" />
<asp:Button runat="server" ID="Button2" Text="Submit Async Postback With Error"
OnClick="ErrorProcessClick_Handler" OnClientClick="ClearErrorState()" />
<br />
</asp:Panel>
</ContentTemplate>
</asp:UpdatePanel>
<div id="AlertDiv">
<div id="AlertMessage">
</div>
<br />
<div id="AlertButtons" >
<input id="OKButton" type="button" value="OK"
runat="server" onclick="ClearErrorState()" />
</div>
</div>
</div>
</form>
</body>
</html>