regular expression

[JJ]

I need the data passed in from the textbox to be in a certain format, eg
xxx-xxx or empty string. What is the regular expression syntax for that?
Thanks

 

[Anthony Jones]

I need the data passed in from the textbox to be in a certain format, eg
xxx-xxx or empty string. What is the regular expression syntax for that?
Thanks

It would help if you specified what domain of values is represented by x.
Any word character would be:-

^\w{3}-\w{3}$

 

[JJ]

Your string does not cover empty string. How do i make the regular
expression so that when the user types text into the textbox, then it should
follow ^\w{3}-\w{3}$ but also allows empty string?

Thanks

 

[Peter Bradley]

^(\w{3}-\w{3})*$

I would think.


Peter

Your string does not cover empty string. How do i make the regular
expression so that when the user types text into the textbox, then it
should follow ^\w{3}-\w{3}$ but also allows empty string?

Thanks

 

[Hans Kesting]

Your string does not cover empty string. How do i make the regular

expression so that when the user types text into the textbox, then it should
follow ^\w{3}-\w{3}$ but also allows empty string?

a RegularExpressionValidator will only check non-empty fields. An empty
field always satisfies all the validators, with one obvious exception:
the RequiredFieldValidator.
So you don't have to add code for the "empty" situation, it's the other
way around: if you *don't* want to accept an empty field, add a
RequiredFieldValidator.

Hans Kesting

 

[Anthony Jones]

^(\w{3}-\w{3})*$

I would think.

That would also match this:- 'a13-b4btjr-ur7'

try:-

^(?:\w{3}-\w{3})?$