Regular Expression for mandatory and number only

Question

I am trying to make regular expression that allow only numbers and must be mandatory. no blank field or white space allow using asp regular expression validater with C#. i tried this ValidationExpression="^[/d]*+$". this is working for number only. blank field accepted by this expression.

Thanks

What @Mr47 is saying is `^\d+$` (the slash direction is also wrong) — Daniel Gimenez, Jul 05 '13 at 12:17

Trajan · Answer 1 · 2013-07-05T14:49:45.973

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The RegexValidator isn't called when the field is empty, you must use the RequiredFieldValidator in combination : http://msdn.microsoft.com/en-us/library/eahwtc9e%28v=vs.100%29.aspx

Besides, the correct regex would be

^\d+$

\d is for any number

+ is for 1 to n occurences

edited Jul 05 '13 at 14:49

answered Jul 05 '13 at 12:19

Trajan

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score 2 · Accepted Answer · edited May 23 '17 at 12:29

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Be careful that \d can match digits other than 0 to 9, such as Eastern Arabic numerals. I would suggest using:

"^[0-9]+$"

edited May 23 '17 at 12:29

Community

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answered Jul 05 '13 at 12:21

Douglas

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Thanks all Dears, I tried all of your solution but not working here is my code – Tarsem Singh Jul 06 '13 at 04:30

score 0 · Answer 3 · answered Jul 05 '13 at 12:18

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Take out the "*". The "+" is being applied to the results of the previous expression which is "0 or more digits" and is always found.

ValidationExpression="^[/d]+$"

answered Jul 05 '13 at 12:18

asantaballa

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Using '/' instead of '\' probably doesn't help either. – Rawling Jul 05 '13 at 12:19
Good point! Was looking at the iteration and missed that. – asantaballa Jul 05 '13 at 12:21
i tried alll but no solution – Tarsem Singh Jul 06 '13 at 04:34

Regular Expression for mandatory and number only

3 Answers3