File uploader validations

Question

Hi I need a validator for file upload functionality in my application developed using asp.net. the validator should allow only docpdf files. Even if the user tries to enter malicious files by changing the extensionthe validator should not allow. Please let me know how to detect renamed extensions in C# Thanks in advance

Deepak Verma · Answer

Hi Naveen you should check for MIME Type of uploaded file. For a complete list of MIME Types check out this link: http://reference.sitepoint.com/html/mime-types-full