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Editorial Team
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Asked: 2026-05-17T00:29:25+00:00

I am developing a login form with User Name and Password. I want the

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I am developing a login form with User Name and Password. I want the user to create the username in a specified format. So i am using RegularExpressionValidator for the username. What is the Validation Expression for this format.

The format is:

xyz\\t4z4567 (characters are not case sensitive)

Rules:

  1. The username will be created in the above format.
  2. first 5 characters(xyz\) are same for every username with the slashes.
  3. Only “t4z4567” will be changed for every user.

Please provide me the solution.

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1 Answer

  1. Editorial Team

    Try this regular expression : "[a-zA-Z]{3}\\\\[a-zA-Z]\d[a-zA-Z]\d{4}"

    Based on your edit, this one should be correct :

    "xyz\\\\[a-zA-Z]\d[a-zA-Z]\d{4}"

    This expression is assuming the specific order of letters and digits as provided in your example. If the last 6 digits can all be letters or digits, then this expression should be sufficient :

    "xyz\\\\\w{6}"
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