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Asked: 2026-06-12T04:27:37+00:00

I want to create RegularExpressionValidator for validation TextBox format hh.mm . This expression works:

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I want to create RegularExpressionValidator for validation TextBox format hh.mm.

This expression works:

^([0-9]|0[0-9]|1[0-9]|2[0-3]).[0-5][0-9]$

But if I insert 5454 in the TextBox it also passes, but it shouldn’t.

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1 Answer

  1. Editorial Team

    . is a meta character in regular expressions that matches any character. If you want to match literally just a period, then you need to escape it:

    ^([0-9]|0[0-9]|1[0-9]|2[0-3])\.[0-5][0-9]$
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