Need Help With Simple Regular Expression

[Joey]

Hello,

I need a regular expression that will allow alpha-numeric characters,
the underscore character, the period character, and the single quote
character.

The following is not working, for some reason...

[0-9a-zA-Z_.']

Can someone provide one that works?

 

[olrt]

[0-9a-zA-Z_\.']+

 

[Kevin Spencer]

Perhaps you're missing a quantifier:

[0-9a-zA-Z_.']

will match a single character.

[0-9a-zA-Z_.']* (0 or more)
[0-9a-zA-Z_.']+ (1 or more)
[0-9a-zA-Z_.']{X} (Exactly X)
[0-9a-zA-Z_.'] {X, Z} (Between X and Z)

--
HTH,

Kevin Spencer
Microsoft MVP
Professional Numbskull

The man who questions opinions is wise.
The man who quarrels with facts is a fool.

 

[Joey]

I have a textbox where I need to take input and limit the characters to
"0-9", "a-z", "A-Z", single quote, period, and underscore, and spaces.

I added a regular expression validator to my webpage, but it is not
working properly with the ValidationExpression property set to the
following...

[0-9a-zA-Z_.']+

I understand that I still may need to add something to get it to allow
spaces, but it won't even work without any spaces at this point. The
input will be from 1-15 characters.

What am I doing wrong?

 

[Joey]

Any ideas, guys?

 

[Joey]

Finally got it...

[0-9a-zA-Z_'.\s]+

 

[Kevin Spencer]

Post your IsValid code.

--
HTH,

Kevin Spencer
Microsoft MVP
Professional Numbskull

If the truth hurts, wear it.

Any ideas, guys?

I have a textbox where I need to take input and limit the characters to
"0-9", "a-z", "A-Z", single quote, period, and underscore, and spaces.

I added a regular expression validator to my webpage, but it is not
working properly with the ValidationExpression property set to the
following...

[0-9a-zA-Z_.']+

I understand that I still may need to add something to get it to allow
spaces, but it won't even work without any spaces at this point. The
input will be from 1-15 characters.

What am I doing wrong?

 

[Kevin Spencer]

If that works for you, I would suggest the following instead:

[0-9a-zA-Z_'. ]+

This has a literal space at the end of the character class. "\s" indicates
that *any* whitespace character will match.

--
HTH,

Kevin Spencer
Microsoft MVP
Professional Numbskull

If the truth hurts, wear it.