Hello:

I am implementing a simple document authentication for my application. To do so, I am comparing the document's contents that was saved from a previous date to the current document. If they match (a long with other keys), I consider it authenticated.

This works fine but during my testing, I found that *.DOC*, *.MSG have issues. Other file types such as *.TIF, *.BMP, *.TXT, *.PDF, etc.. work just fine. I haven't check that many file types but this is an issue.

Apparently, after I save this content on the SPListItem, the content changes. I verified this by checking the SPListItem object's File object's OpenBinary method. After I upload the same document, the byte array is identical. As soon as I update the SPListItem to save this data within one of the fields, the byte array from the OpenBinaryM method is different. This means that Sharepoint is altering the document? I am really hoping that isn't the case.

Anyone have any ideas?

TTT

Verified that for at least .DOC* and .MSG, SP is altering the content based on the SPListItem. So if you modify the metadata, you modify the content that is returned within OpenBinary method.

I am very surprised someone has not responded to this thread. In now way should SP be altering data.

Apparently, SP's Document Demotion is causing this. Trying to find a way to disable but it appears built-in. Not good.

Solution:

Set SPWeb object's ParserEnabled property to false.

Thanks everyone for all the help!