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RegularExpressionValidator for folder names

Posted on 2010-09-02
Last Modified: 2013-12-17
I am using regex to validate a folder name entered in a textbox.
For that I'm using the following.

ValidationExpression="^(?!((con|prn|aux)((\.[^\\/:*?<>|]{1,3}$)|$))|[\s\.])[^\\/:*?<>|]{1,254}$" />

But I can't use " here 'cos it's breaking the string.
How can I validate it with "
Question by:heggies007

Expert Comment

ID: 33584593
try to using [^\"]*

It will match

Author Comment

ID: 33584631
Thanks for the quick response.
But I can't use that. When it see the " mark it's giving an error.
Can you please let me know how can I include the double quotes mark (") to my existing regex.
It works fine except "

Note: I am using this in a .aspx file

Expert Comment

ID: 33584711
you can use escape character before the (")

check if it works

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Expert Comment

ID: 33584731
LVL 12

Accepted Solution

Mortaza Doulaty earned 500 total points
ID: 33584862
In case of using in aspx file, try to use &quot; instead of ".
LVL 14

Expert Comment

by:Dhanasekaran Sengodan
ID: 33584948
Check this One As well I want that these strings must be allowed c:\, c:\Program Files\, \\ahmed\,\\ahmed\Program files\,C:\program files\C booksand I have modified your Regular Expression, with this one
^(([a-zA-Z]:)|(\\{2}\w+))(\\(\w[\w ]*\w))*(\\)$ 

Open in new window

LVL 16

Expert Comment

by:Vikram Singh Saini
ID: 33584982

Author Comment

ID: 33593745
Hi puru1981:

Thanks. But both of your solutions didn't work.
1. Won't compile
2. I was going to validate a "Folder name" not a "Folder path"

 I was going to validate a "Folder name" not a "Folder path"

Thanks for the info.

Great.. Simple solution... worked for me.

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