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copied!<p>I'm not certain what you're saying here, but basically a page the user is already reading contains an old, long, URL, and you'd like it to change to the new, short URL, dynamically on the client side, before the browser requests the page from the server?</p> <p>The only way I think this coule be done would be to use Javascript to change the URL in response to onclick or document.ready, but it would be pointless. You'd need to know the new short url for the javascript to re-write to, and if you knew that, why not simply render that url into the link in the first place?</p> <p>It sounds more like you want URL routing, as included in ASP.Net 4 and 3.5?</p> <p>Standard URL rewriting modifies the incoming request object on the server, so the client browser submits the new URL, and the downstream page handlers see the old URL. I believe the routing things extend this concept to the outgoing response too, rewriting old urls in the response page into new URLs before they're sent to the client.</p> <p>Scott Gu covers the subject here: <a href="http://weblogs.asp.net/scottgu/archive/2009/10/13/url-routing-with-asp-net-4-web-forms-vs-2010-and-net-4-0-series.aspx" rel="nofollow">http://weblogs.asp.net/scottgu/archive/2009/10/13/url-routing-with-asp-net-4-web-forms-vs-2010-and-net-4-0-series.aspx</a></p> <p>Scott Gu also has an older post on normal URL rewriting outlining several different ways to do it. Perhaps you could extend this concept by hooking into Application_PreSendRequestContent and manually modifying all the href values in the response stream, but I wouldn't fancy it myself. <a href="http://weblogs.asp.net/scottgu/archive/2007/02/26/tip-trick-url-rewriting-with-asp-net.aspx" rel="nofollow">http://weblogs.asp.net/scottgu/archive/2007/02/26/tip-trick-url-rewriting-with-asp-net.aspx</a></p>

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