"Tom Jones" <tomjones16@hotmail.com> wrote in message
news:%23xBiJzWNEHA.2780@TK2MSFTNGP09.phx.gbl...
> Hi,
>
> I have a component that accepts a string representing a class of files
> (exactly like those you would pass to the 'dir' dos command, ie. '*.txt',
or
> '???.cpp').
>
> An exception is generated if I try to create a Regex like this:
>
> Regex r = new Regex("*.txt");
>
> I understand why that is a problem, thus I parse my filter strings as
such:
> '*' gets replaced by '.*', '?' gets replaced by '.{1}', and any '.' found
in
> the original filter is replaced with its hex representation, '\x2E'.
>
> Thus something like "???.a" (any 3 letter filename that ends in an 'a') we
> be sent to the Regex ctor as such:
>
> Regex r = new Regex(@"^.{1}.{1}.{1}\x2Ea$");
>
> My problem is that the result of r.IsMatch("0.0.1235.a") is *true*!!??
>
> Can someone please explain why r.IsMatch() returns true in this case?
>
> Thanks!
> Tom

wrote:

> Hi,
>
> I have a component that accepts a string representing a class of files
> (exactly like those you would pass to the 'dir' dos command, ie.
> '*.txt', or
> '???.cpp').