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POUnblock (jQuery BlockUI) after file sent to browser through response stream
 

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    <p>I have an <code>&lt;asp:button /&gt;</code> that generates a PDF report. I want to use jQuery BlockUI to display a message that says: Generating Report..</p> <p>Using: <code>Response.BinaryWrite</code> I am then sending the file to the user so it appears as a file download in the browser.</p> <p>I cannot get <code>$.unblockUI();</code> to fire. As soon as the file download begins or has completed or is cancelled I want it to dissappear. Currently it never does.. It's as though the page hasn't been re-loaded, I've hit the server but it comes back with the same page.</p> <p>Things I have tried:</p> <ul> <li>Setting a variable in JS to true so on <code>document.ready()</code> it will call a function if set to true. This doesn't work because even though I change the variable in code it doesn't change the HTML that is sent to the client.</li> <li>This sort of thing: <code>Sys.WebForms.PageRequestManager.getInstance().add_pageLoaded(function() { $.unblockUI; }); //register with Microsoft way $(document).ajaxStop($.unblockUI); //double the insurance and register with jquery way</code> never gets called..</li> </ul> <p>Can this be achieved with an updatepanel?</p> <p>Any thoughts?</p> <p>Also in case it helps:</p> <pre><code>Response.AddHeader("Content-Disposition", "attachment;filename=""" &amp; ShortFilename &amp; """") Response.AddHeader("Content-Length", byteArray.Length) Response.BinaryWrite(byteArray) Response.Flush() Response.End() </code></pre> <p>I can see why this doesn't work sort of, the page is not refreshing in anyway there's just a response stream being sent to the browser, but surely there's an event I can latch on to?</p>
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    1. COHave you found a solution to this problem?
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    2. COIt's effectively impossible to do it the way I originally intended as returning a stream does not re-load the page or allow you to pass any custom logic..
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    3. COThe solution is to do all of the processing with the loading screen showing, then either return a response that will remove BlockUI and then request the file you want to stream, or redirect them to a page which will re-request the stream.. You need to keep the file on the hard drive temporarily to do this though..
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