How to validate a textbox for just numbers 1

[bigfoot]

I'm looking for a validation expression that will allow a number in a textbox.

I tried this
ValidationExpression="[0-9]*\.[0-9]*"

But it makes me add the decimal and I want to be able to add an integer if I want.
And no spaces.

Any help would be great.

 

[ca8msm]

Try looking at

http://regexlib.com/

for any Regular Expression issues. They have a "cheat sheet" which should explain how to do what you need.

You could also look into using a RangeValidator control if this is for validating data and you want to avoid a RegEx.


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[bigfoot]

Thank you. I was out to that site but didn't see the cheat sheet.

I was so close.
FYI for others.
This:
ValidationExpression="[0-9]*\.?[0-9]*"

or This:
ValidationExpression="\d*\.?\d*"

This will allow multi decimal points - bad.
ValidationExpression="\d*\.*\d*"