Recently I was looking for a regular expression
to validate a file path and extension. I found several of them on
Google but none of them fit my requirement. So I decided to put
together a version that suits my need. Here is the Regular Expression
to validate the file path and extension and it compatible with
JavaScript and ASP.NET.
^(?:[\w]\:|\\)(\\[a-z_\-\s0-9\.]+)+\.(txt|gif|pdf|doc|docx|xls|xlsx)$
|
Explanation:
^(?:[\w]\:|\\) -- Begin with x:\ or \\
<br/>
[a-z_\-\s0-9\.] -- valid characters are a-z| 0-9|-|.|_ (you can add more)
(txt|gif|pdf|doc|docx|xls|xlsx) -- Valid extension (you can add more)
|
Matches:
\\192.168.0.1\folder\file.pdf
\\192.168.0.1\my folder\folder.2\file.gif
c:\my folder\abc abc.docx
c:\my-folder\another_folder\abc.v2.docx
Non-Matches:
\\192.168.0.1\folder\fi<le.pdf
\\192.168.0.1\folder\\file.pdf
\\192.168.0.1\my folder\folder.2\.gif
c:\my folder\another_folder\.docx
c:\my folder\\another_folder\abc.docx
c:\my folder\another_folder\ab*c.v2.docx
c:\my?folder\another_folder\abc.v2.docx
file.xls
Test it:
http://regexpal.com/
http://regexlib.com/