I'm also trying to use DataUtil.ForceDownload to download a PDF contained in a MemoryStream:

               MemoryStream ms = new MemoryStream(pdf);
                DataUtil.ForceDownload(Page, ms, "Letters.pdf", "application/pdf");

The problem is that the file opens directly in the browser and I'd like the user to be prompted with an Open/Save dialog box.

There doesn't seem to be a way to set the Content-Disposition to "attachment" with ForceDownload, is there?

Thanks for your advice.
Mike

Hi Mike,

This behaviour is due to the Adobe Reader settings. Please change the settings in Adobe Reader for enabling Open/Save dialog box.

To change the settings, open Adobe Reader, goto Edit --> Preferences --> Internet. Uncheck "Display pdf in browser".

After changing the settings, the pdf doc will open in a new window in Adobe Reader software.

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Best Regards,

Saqib Razzaq
Support Developer
Aspose Guangzhou Team