In Firefox, they just won't open. I have changed the in-built file download limit of ASP in IIS7 to 15MB from 4MB and that made no difference (my files range in size up to 12MB). The only difference from when my files downloaded properly to now is the change in OS on the server and therefore going from IIS6 to IIS7. Why are .docx files being corrupted when downloading from an ASP.NET page? Ask Question Asked 9 years, pdf, doc, etc), but .docx files, when downloaded, are corrupted and they need to be fixed by Office in order to be opened. and I was adding rendered HTML of the page to every PDF file I was sending. Might be the same for other binary
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