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copied!<p>I ran into this same problem, and could only get it to work by asking the user to modify their security settings to turn off <i>Do not save encrypted pages to disk</i> in the Advanced tab of the Internet Options dialog: <a href="http://support.microsoft.com/kb/812935" rel="nofollow noreferrer">http://support.microsoft.com/kb/812935</a></p> <p><b>...then</b> with the immediate panic over, I started looking at the code (ASP.NET using VB). I used fiddler and found that even when I wasn't specifying the cache-control header it seemed that the Framework was automatically specifying no-store for me. The key to solving the issue was actually in <a href="https://stackoverflow.com/questions/773308/ie-https-generating-pdf-from-php-file-doesnt-work">this PHP question</a>. By setting the cache-control header to <i>max-age=1</i> the file would be cached for 1 second, just long enough for Adobe Reader to pick it up from the disk and load it into memory. I updated our code to generate the PDF as follows:</p> <pre><code>Response.ClearContent() Response.ClearHeaders() Response.AddHeader("cache-control", "max-age=1") Response.ContentType = "application/pdf" Response.AddHeader("content-disposition", "attachment; filename=whatever.pdf") Response.AddHeader("content-length", mem_stream.Length.ToString) Response.BinaryWrite(mem_stream.ToArray()) Response.Flush() Response.End() </code></pre> <p><b>Update:</b> I thought it was working, but I guess I spoke too soon. I created a <a href="https://stackoverflow.com/questions/1202285/generating-pdf-error-with-ie-and-https">new question</a> to follow through with this issue.</p>

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