Validating Positive number with comma and period

 

I need a regular expression validation expression that will

ALLOW

  • positive number(0-9)
  • , and .

    • DISALLOW

  • letter(az)
  • any other letter or symbol except . and ,

    • for example, on my asp.net text box, if I type anything@!#-- , the regular expression validation will disallow it, if I type 10.000,50 or 10,000.50 it should allowed.

    I've been trying to use this regex: 

    ^d+(.dd)?$

    but my textbox also must allow , symbol and I tried using only integer regex validation, it did disallow if I type string, but it also disallow . and , symbol while it should allow number(0-9) and also . and , symbol

    Your regex would be, 

    (?:d|[,.])+

    OR 

    ^(?:d|[,.])+$

    It matches one or more numbers or , or . one or more times.

    DEMO

    Don't Use d to match [0-9] in .NET

    First off, in .NET, d will match any digits in any script, such as: 

    654۳۲١८৮੪૯୫୬१७੩௮௫౫೮൬൪๘໒໕២៧៦᠖

    So you really want to be using [0-9]

    Incomplete Spec

    You say you want to only allow "digits, commas and periods", but I don't think that's the whole spec. That would be ^[0-9,.]+$ , and that would match 

    ...,,,

    See demo.

    Tweaking the Spec

    It's hard to guess what you really want to allow: would 10,1,1,1 be acceptable?

    We could start with something like this, to get some fairly well-formed strings: 

    ^(?:[0-9]+(?:[.,][0-9]+)?|[1-9][0-9]{0,2}(?:(?:.[0-9]{3})*|(?:,[0-9]{3})*)(?:.[0-9]+)?)$

    Play with the demo, see what should and shouldn't match... When you are sure about the final spec, we can tweak the regex.

    Sample Matches: 

    0
12
12.123
12,12
12,123,123
12,123,123.12456
12.125.457.22

    Sample Non-Matches: 

    12,
123.
1,1,1,1

    Maybe you can use this one (starts with digit, ends with digit): 

    (d+[,.])*d+

    If you need more sophisticated price Regex you should use: 

    (?:(?:[1-9]d?d?([ ,.]?d{3})*)|0)(?:[.,]d+)?

    Edit: To make it more reliable (and dont get 00.50) you can add starting and ending symbol check: 

    (^|s)(?:(?:[1-9]d?d?([ ,.]?d{3})*)|0)(?:[.,]d+)($|s)?
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