Any way to alert the user of a bad file type?

[Ed Staffin]

I know I can limit the file types that can be uploaded via AllowedFileExtensions, however, all it does is ignore bad file types. Since I am only allowing one file at a time to be uploaded, it would be nice if I could issue a radalert or something when the try to upload a type that is not allowed.
Any ideas?
Thanks ... Ed

[Atanas Korchev]

Hi Ed Staffin,

I believe this example will help you achieve your goal.

I hope this helps,
Albert
the Telerik team

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[Meaning Of Lights]

As per http://forums.microsoft.com/msdn/ShowPost.aspx?PostID=2803992&SiteID=1 Lookup "Winista" it uses binary analysis to determine a files MIME type... Say someone renames a exe with a jpg extension... you can still determine the "real" file format.  It doesn't detect swf's or flv's but does pretty much every other well known format + you can get a hex editor and add more files it can detect. HTH