Check uploaded file type?

Question

Can I check uploaded file type? This is my code: if (file.ContentType==application/vnd.ms-excel) But if I rename a txt file to .xls it not run :( Thankss

alainc · Answer

yes is a asp.net application. ContentType show the end of file name .txt .xls .doc. But it can be false. By example a .doc file renamed to .xls. Do you understand me? Thanks PD: sorry by my english i'm spanish

mibuyt · Answer

Hi I am confuse with 2 things. 1. Uploaded file types? You mean you have upload a file on the web? If yes why not use this instead? FileWebResponse.ContentType Property 2. Rename a txt file to .xls? Can you elaborate more? I hope i can help you somehow. Cheers.