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POResponse.Redirect() Turns Response.RedirectLocation NULL
 

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  1. POResponse.Redirect() Turns Response.RedirectLocation NULL
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    <p>I have a group of Asp.Net applications that all share a common HttpModule that contains some code like this:</p> <pre><code>public class MyModule : IHttpModule { public void Dispose() { } public void Init( HttpApplication context ) { context.Error += new EventHandler( context_Error ); } private void context_Error( object sender, EventArgs e ) { var lastError = HttpContext.Current.Server.GetLastError(); doSomeStuffWithError(lastError); var response = HttpContext.Current.Response; var redirect = GetErrorRedirect(lastError); response.Redirect(redirect, true); } } </code></pre> <p>This works totally fine for all of my applications except for one. In the case of the one that doesn't work correctly, response.Redirect(...) doesn't seem to work. Instead of the redirect I expect, Asp.Net is redirecting to its standard error page. I've checked the configuration of this application and don't see anything wrong or significantly different from the other applications.</p> <p>While investigating this issue, I modified the error handler with one more line of code as follows:</p> <pre><code>private void context_Error( object sender, EventArgs e ) { var lastError = HttpContext.Current.Server.GetLastError(); doSomeStuffWithError(lastError); var response = HttpContext.Current.Response; var redirect = GetErrorRedirect(lastError); //setting a break point here, i've verified that 'redirect' has a value in all cases response.Redirect(redirect, true); var wtf = response.RedirectLocation; //inspecting the value of 'wtf' here shows that it is null for one application, but equal to 'redirect' in all others. } </code></pre> <p>When I set a break point on 'wtf' I'm seeing some strange behavior. For applications that work, wtf contains the same value as redirect. However, for my app that isn't working, wtf is null.</p> <p>Anyone have any ideas on what would cause wtf to be null in this way?</p>
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      1. POResponse.Redirect() Turns Response.RedirectLocation NULL
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    1. COShot in the dark: does the problem app handle App_UnhandledException in global.asax?
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    2. COPlease don't redirect users to another page in the event of an error because that's not what HTTP 3xx redirects are for. Instead return code 500 and a suitable error message without redirecting the user.
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    3. CO@dbaseman No, definitely not. And note, the breakpoint I set within the handler is always triggered. Dai, I more or less agree, however this is a legacy case.
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