html - Upload issue in MIME type while file open -

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i have issue when try upload attachment application. when file still open on computer , try upload it, application/octet-stream mime type instead of application/sword. when close it, there no error while uploading.

files have problem excel or word files , stocked in database. configuration of database allows save in binaries , text (depending of file)

obviously, fix closing it. understand how/why file uploaded in mime type.

edit : browser ie9 (compatibility ie7) , os windows 7. happends on each computer of service. (with same configuration)


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