Display loading message and then prompt for open / save
<p>I'm trying to get a page to show a "loading..." message while I create a report and then I'd like to trigger an open / save on the report I've just created.</p>

<p>I can create a static loading page but I don't know how to trigger the open / save dialog. 
I could insert an <code>&lt;iframe&gt;</code> but then I would have to save the created report on the server side.</p>

<p>What I'm looking for is a way to just embed the created report into the HTML and let the browser deal with (the report files are Excel and PDF).</p>

<p>Is there a way to do that? I looked at <code>&lt;embed&gt;</code> but it requires a URL, same as <code>&lt;iframe&gt;</code>. </p>

<p>Maybe my best bet is to handle everything in an Http handler and make a first call to generate the report and then do a redirect to display it (and trigger the open / save).</p>

<p>Any ideas?</p>
