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Thread: Validate textbox to be alpha only

  1. Sep 1st, 2005, 08:37 AM #1
    staticbob
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    Validate textbox to be alpha only

    Guys,

    How can I force a textbox on an asp.net page to contain alpha and num chars only ? ie - No symbols.

    When the users hit a button I am adding a record to my SQL dbase and I need to ensure they are not using symbols in certain fields.

    Thanks
    Bob
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  2. Sep 1st, 2005, 08:57 AM #2
    GlenW
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    Re: Validate textbox to be alpha only

    Use a RegularExpressionValidator control.
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  3. Sep 1st, 2005, 09:52 AM #3
    staticbob
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    Re: Validate textbox to be alpha only

    Thanks Glen, but what would the validation expression be ?

    Thanks
    Bob
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  4. Sep 1st, 2005, 10:16 AM #4
    GlenW
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    Re: Validate textbox to be alpha only

    This may not be spot on but it shouldn't be far away.

    [^a-zA-Z0-9]
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