ScriptManager.AsyncPostBackErrorMessage Eigenschap
Definitie
Belangrijk
Bepaalde informatie heeft betrekking op een voorlopige productversie die aanzienlijk kan worden gewijzigd voordat deze wordt uitgebracht. Microsoft biedt geen enkele expliciete of impliciete garanties met betrekking tot de informatie die hier wordt verstrekt.
Hiermee wordt het foutbericht dat naar de client wordt verzonden, opgevraagd of ingesteld wanneer er een niet-verwerkte server-uitzondering optreedt tijdens een asynchrone postback.
public:
property System::String ^ AsyncPostBackErrorMessage { System::String ^ get(); void set(System::String ^ value); };public string AsyncPostBackErrorMessage { get; set; }member this.AsyncPostBackErrorMessage : string with get, setPublic Property AsyncPostBackErrorMessage As StringWaarde van eigenschap
Het foutbericht. De standaardwaarde is een lege tekenreeks ("").
Voorbeelden
In het volgende voorbeeld ziet u hoe u de AsyncPostBackError gebeurtenis kunt afhandelen om de AsyncPostBackErrorMessage eigenschap (die naar de client wordt verzonden) in te stellen op het foutbericht van de serveruitzondering.
<%@ 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.
throw new ArgumentException();
}
protected void SuccessProcessClick_Handler(object sender, EventArgs e)
{
// This handler demonstrates no server side exception.
UpdatePanelMessage.Text = "The asynchronous postback completed successfully.";
}
// <Snippet3>
protected void ScriptManager1_AsyncPostBackError(object sender, AsyncPostBackErrorEventArgs e)
{
ScriptManager1.AsyncPostBackErrorMessage = e.Exception.Message;
}
// </Snippet3>
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head 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" runat="server"
OnAsyncPostBackError="ScriptManager1_AsyncPostBackError">
</asp:ScriptManager>
<script type="text/javascript" language="javascript">
var divElem = 'AlertDiv';
var messageElem = 'AlertMessage';
var errorMessageAdditional = 'Please try again.';
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 && args.get_error().httpStatusCode == '500')
{
var errorMessage = args.get_error().message
args.set_errorHandled(true);
ToggleAlertDiv('visible');
$get(messageElem).innerHTML = '"' +
errorMessage + '" ' + errorMessageAdditional;
}
}
</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>
</form>
</body>
</html>
<%@ 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.
Throw New ArgumentException()
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
' <Snippet3>
Protected Sub ScriptManager1_AsyncPostBackError(ByVal sender As Object, ByVal e As System.Web.UI.AsyncPostBackErrorEventArgs)
ScriptManager1.AsyncPostBackErrorMessage = e.Exception.Message
End Sub
' </Snippet3>
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head 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 runat="server" ID="ScriptManager1"
OnAsyncPostBackError="ScriptManager1_AsyncPostBackError">
</asp:ScriptManager>
<script type="text/javascript" language="javascript">
var divElem = 'AlertDiv';
var messageElem = 'AlertMessage';
var errorMessageAdditional = 'Please try again.';
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 && args.get_error().httpStatusCode == '500')
{
var errorMessage = args.get_error().message
args.set_errorHandled(true);
ToggleAlertDiv('visible');
$get(messageElem).innerHTML = '"' +
errorMessage + '" ' + errorMessageAdditional;
}
}
</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>
</form>
</body>
</html>
Opmerkingen
De AsyncPostBackError gebeurtenis wordt gegenereerd wanneer er een paginafout optreedt tijdens asynchrone postbacks. Hoe fouten op de server naar de client worden verzonden, is afhankelijk van de AllowCustomErrorsRedirect eigenschap, de AsyncPostBackErrorMessage eigenschap en de sectie aangepaste fouten van het Web.config-bestand.