ScriptManager.OnAsyncPostBackError(AsyncPostBackErrorEventArgs) Método

Referencia

Definición

Espacio de nombres:: System.Web.UI

Ensamblado:: System.Web.Extensions.dll

Importante

Parte de la información hace referencia a la versión preliminar del producto, que puede haberse modificado sustancialmente antes de lanzar la versión definitiva. Microsoft no otorga ninguna garantía, explícita o implícita, con respecto a la información proporcionada aquí.

Genera el evento AsyncPostBackError.

protected public:
 virtual void OnAsyncPostBackError(System::Web::UI::AsyncPostBackErrorEventArgs ^ e);

protected internal virtual void OnAsyncPostBackError (System.Web.UI.AsyncPostBackErrorEventArgs e);

abstract member OnAsyncPostBackError : System.Web.UI.AsyncPostBackErrorEventArgs -> unit
override this.OnAsyncPostBackError : System.Web.UI.AsyncPostBackErrorEventArgs -> unit

Protected Friend Overridable Sub OnAsyncPostBackError (e As AsyncPostBackErrorEventArgs)

Parámetros

e: AsyncPostBackErrorEventArgs

Datos del evento de error.

Ejemplos

En el ejemplo siguiente se muestra cómo controlar el AsyncPostBackError evento para establecer la AsyncPostBackErrorMessage propiedad (que se envía al cliente) al mensaje de error de excepción del servidor.

<%@ 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>

Comentarios

El AsyncPostBackError evento se genera cuando se produce un error de página durante los postbacks asincrónicos. El modo en que los errores del servidor se envían al cliente depende de la AllowCustomErrorsRedirect propiedad, la AsyncPostBackErrorMessage propiedad y la sección de errores personalizados del archivo Web.config.

Se aplica a

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