Document not opening

Question

I am uploading documents using multifile upload control. my issue is after downloading the file is not opening it showing error message like this

chandu bada · Answer

Sorry Gnanavel I can't Share the Code.

Gnanavel Sekar · Answer

can you share me that code of uploading and downloading

chandu bada · Answer

hiii Gnanavel     thanks for your reply  i checked file format while uploading and while downloading both are same.

Gnanavel Sekar · Answer

1.Check whether your filename with proper format while uploading 2. Check same while downloading whether you are getting file with format..    You need to specify the file format while downloading     or just share your uploading and downloading place code. i will let you know the mistake   if help you out, accept as answer