Tuesday, March 2, 2010

Sample regular expression - Numeric, Decimal, Alphanumeric, Date

Hi all,
Please find useful regular expressions for numeric, alphanumeric, alphabets only, date etc,
  1. Numbers only regular expression (0-9 regex) – ^[0-9]*$
  2. Decimal numbers with 2 floating point compulsory regular expression (0-9 with decimal) – ^([0-9]*)(\.[0-9]{2})?$
  3. Alphabets only regular expression () – ^[a-zA-Z]*$
  4. Alphanumeric string regular expression – ^[a-zA-Z0-9]*$
  5. Alphanumeric and white space regular expression – ^[a-zA-Z0-9 ]*$
  6. Date regular expression (dd/MM/yyyy regex) - ^(((0[1-9]|[12]\\d|3[01])\\/(0[13578]|1[02])\\/((19|[2-9]\\d)\\d{2}))|((0[1-9]|[12]\\d|30)\\/(0[13456789]|1[012])\\/((19|[2-9]\\d)\\d{2}))|((0[1-9]|1\\d|2[0-8])\\/02\\/((19|[2-9]\\d)\\d{2}))|(29\\/02\\/((1[6-9]|[2-9]\\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))))$
If you want to see how to build regular expressions you can see my article

9 comments:

  1. Thank you for sharing with good, useful survey. Nowadays mobile technologies are the most used in android development that needs in developing of mobile software apps for cells.

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  2. that's simple and useful thanks....!!!!

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  3. nice one really helpful

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  4. Can Anyone tell me for this pattern

    name-00

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  5. [a-zA-Z]*[-][0-9]*
    Make * to your number of char required

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  6. Not really helpful as many of the expressions are not working in c#
    for Example

    ^[a-zA-Z0-9 ]*$ this gives me nothing

    I am working in c# here is the code @"^([0-9]*)(\.[0-9]{2})?$" but all it gives me is blank when searching for decimal nos

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  7. Expressions provided in the example are for validation. They are for single line value and should only match specified characters. If you want to search a decimal number from a random string you will need to remove ^ and $ sign. All the regex provided here has been checked with Regular Expression Validator.
    If you want to know why you are not able to search, provide your input.

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  8. Nice Thanks a Lot !!!!

    ReplyDelete

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