Combining two regex for ASP.NET MVC data annoation

Question

I have two regexes.

One is for no space at the beginning and end but there can be a space in between words:

^[^\s]+(\s+[^\s]+)*$

And the second one is for allowing some special characters:

 ([^\\~!@#$%^&*()+=?<>|/""]*)

Now, I want to combine both regex into a single regex.

I have tried with | sign suggested in another post but that is not working for me.

I am using ASP.NET MVC data annotations.

Valid are:
"A"
"A."
"A,"
"A'S"
Invalid are:
 " A "
 " A"
 " B"
 "A@"
 "A!"

It sounds like Trim does exactly what your first is doing... Can you please explain what "not working" entails too? — Sayse
– Sayse, Commented Jul 16, 2015 at 7:13

Wiktor Stribiżew · Accepted Answer · 2015-07-16 07:38:43Z

1

You can use one regex to restrict the other within a lookahead:

^(?=([^\\~!@#$%^&*()+=?<>|/""]*)$)[^\s]+(\s+[^\s]+)*$

See demo (note I added \r? for demo purpose in multiline mode, and had to replace \s with literal space, but I guess that will not be necessary).

answered Jul 16, 2015 at 7:38

Wiktor Stribiżew

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1 Comment

Wiktor Stribiżew Over a year ago

Does it work for you? If not, or you have doubts, please provide the exact requirements, and if possible, the code where you are using the regex patterns.

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