.net - C# - Regex for file paths e.g. C: est est.exe

Question

I am currently looking for a regex that can help validate a file path e.g.:

C:estest2est.exe

Answer 1

I decided to post this answer which does use a regular expression.

^(?:[a-zA-Z]:|\\[w.]+\[w.$]+)\(?:[w]+\)*w([w.])+$

Works for these:

\testest$TEST.xls
\serversharefoldermyfile.txt
\serversharemyfile.txt
\123.123.123.123sharefoldermyfile.txt
c:foldermyfile.txt
c:foldermyfileWithoutExtension

Edit: Added example usage:

if (Regex.IsMatch (text, @"^(?:[a-zA-Z]:|\\[w.]+\[w.$]+)\(?:[w]+\)*w([w.])+$"))
{
  // Valid
}

*Edit: * This is an approximation of the paths you could see. If possible, it is probably better to use the Path class or FileInfo class to see if a file or folder exists.