How to restrict file type in FileUpload control

Question

Hi all,

Is it possible to allow the fileupload control to show only images?

When we click the Browse button it should show only images.

Geetha

Answer 1

No, in web you can't from client side, evidently from server side you can do amazing things. For this kind of thing, programmers normally use Activex, flash or the like.

Answer 2

Assuming you mean uploading images only.

You can check the ContentType property of the file (I.e. image/gif).

Take a look here for an example: http://www.15seconds.com/issue/061116.htm

Answer 3

If you mean upload, you can check this through the uploaded file Content Type, you can get it from here

fileUploadControl.PostedFile.ContentType

and here are a list of content types you can filter by: http://www.w3schools.com/media/media_mimeref.asp http://www.webmaster-toolkit.com/mime-types.shtml

Answer 4

With plain <input type="file">, I am afraid it's not possible on the client-side.

However, some 3rd party uploader such as SWFUpload provides this functionality.