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POHow to issue server side Redirect with AJAX error
 

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  1. POHow to issue server side Redirect with AJAX error
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    <p>I have the following setup:</p> <ol> <li>Web.config has customErrors mode="Off"</li> <li>Global.Application_Error() event calls a custom function called UtilitiesWeb.ProcessError()</li> <li>UtilitiesWeb.ProcessError() logs the error, then redirects the user with: HttpContext.Current.Response.Redirect(defaultErrorPage, false)</li> </ol> <p>This works well as a good global error handler, except when dealing with AJAX. AJAX displays the error with in JavaScript, and ignores the redirect. </p> <p>To get the page to redirect on an AJAX error I had to do the following:</p> <ol> <li>Update asp:ScriptManager to: &lt;asp:ScriptManager ID="scriptmanager1" runat="server" <strong>OnAsyncPostBackError="ScriptManager1_AsyncPostBackError"</strong>&gt;</li> <li>Add Server side ScriptManager1_AsyncPostBackError method that calls UtilitiesWeb.ProcessError()</li> <li>Add the following JavaScript to redirect because AJAX ignores the server side redirect:</li> </ol> <blockquote> <pre><code>&lt;script type="text/javascript"&gt; if (typeof (Sys) != 'undefined') { Sys.WebForms.PageRequestManager.getInstance().add_endRequest(endRequest); function endRequest(sender, e) { if (e.get_error()) { window.location = "ErrorPage.aspx" } } } &lt;/script&gt; </code></pre> </blockquote> <p>But all this seems like a workaround. Is there way to have a server side redirect that works with AJAX errors? </p> <p>For completeness, here is the code for UtilitiesWeb.ProcessError():</p> <pre><code>public static void ProcessError() { string defaultErrorPage = ConfigurationManager.AppSettings["DefaultErrorPage"]; string displayError = ConfigurationManager.AppSettings["DisplayError"]; Exception ex; if (!string.IsNullOrWhiteSpace(displayError)) displayError = displayError.ToLower(); ex = HttpContext.Current.Server.GetLastError(); if (ex != null) Log.LogException(DateTime.Now, null, ex); // Redirect to Default Error page on error if (displayError == "basic") { HttpContext.Current.Server.ClearError(); // needed for redirect to work if (!string.IsNullOrWhiteSpace(defaultErrorPage)) HttpContext.Current.Response.Redirect(defaultErrorPage, false); // doesn't work with AJAX calls } } </code></pre>
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    1. COI ran into a similar issue and what I ended up doing was returning the url that I wanted it to redirect to and did the same thing as you are doing by setting the `window.location` equal to it.
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    2. COWhile debugging it will get to the redirect line, but something prevents it from redirecting. Odd that we have to do it from the client.
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    3. COAs far as I know, it is the client that prevents it from redirecting. As Response.Redirect just issues a 302 to the client which then redirects. With ajax, your ajax response should have a 302 and the url to redirect to. In short all 302s are sent back to the client, but with ajax you need to interpret it yourself.
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