Question

I have a form and I upload a file and I have to verify that the filename has this format input##.txt, where ## are digits.

Until now I’ve had a validator on the upload input and the regular expression that I found is input\d{2}\.txt, but is not enough because the FileUpload control’s filename looks like this :

C:\Documents and Settings\xyz\Desktop\input01.txt

and I need to validate only the part with input01.txt.

Could anyone help me?

Answer 1

Try this:

var fileName = Path.GetFileName(path);
var regex = new Regex("input\d{2}.txt", RegexOptions.IgnoreCase);
var isValid = regex.Matches(fileName);