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i am making a username field in windows form.
i have find many regex but result is not good.
I have find this regex ^[a-z0-9_-]{3,16}$
which is taking value between 3 character to 16 characters. But it is not taking uppercase letter.
I am not a regex guru. Niether i added that code in my given regex.
Can anyone help me out

thanks in advance
Posted 29-Sep-12 18:18pm
sariqkhan1.4K
Updated 29-Sep-12 18:23pm
v2

1 solution

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Solution 1

How about:
[a-zA-Z0-9_-]

Take a look at this too:
Expresso - A Tool for Building and Testing Regular Expressions[^]
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Comments
sariqkhan 30-Sep-12 0:27am
   
thanks bro. For helping
: )
sariqkhan 30-Sep-12 0:33am
   
is there any thing to check whether - or underscore are at the end of the line? I want to avoid that username which have underscore or dash at end.
Kenneth Haugland 30-Sep-12 0:44am
   
^[a-zA-Z0-9_-]{3,16}[^_]$
sariqkhan 30-Sep-12 0:52am
   
this will matches the patters that there is underscore at end?
Kenneth Haugland 30-Sep-12 0:57am
   
It will match if ther is NO underscore at the end the ^ inside the [] means not...
ridoy 30-Sep-12 1:26am
   
right
sariqkhan 30-Sep-12 1:34am
   
but bro it is taking special characters
like * + = how can i avoid that

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