Re: I need validation to fail on an apostrophe entered into a textbox for my regularexpression validator

Hello hamsterchaos@xxxxxxxxx,

<asp:RegularExpressionValidator id="valRegEx" runat="server"
ControlToValidate="textbox1"
ValidationExpression=" "
ErrorMessage="* Please only enter alphanumeric values and make sure
you are not entering in any apostrophes."
display="dynamic">*
I need

"Chris's mail"

to fail the above validation - which I believe means I need the
regular expression to return a no match on the above line.

Can you help?

The expression must capture what it should be, not what it shouldn't be. In your case that's quite easy:

^[a-zA-Z0-9 ]+$

any alphanumeric character or space. You can add other allowed characters in there if needed.

I do wonder why you want to exclude these characters. If it is to prevent SQL injection or cross site scripting, then adding a regex validator to your textboxes isn't the best idea to employ.

--
Jesse Houwing
jesse.houwing at sogeti.nl


.

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