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Regular Expression Help

P: n/a
I am looking for a regular expression to validate input into a textbox.
I only want to allow valid alpha-numeric characters (no special
characters, such as ?, *, {} [] etc...).

An example would be much-appreciated!

Thanks!

Jul 10 '06 #1
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3 Replies


P: n/a
Read that carefully http://www.15seconds.com/issue/010301.htm
I hope it helps
I am looking for a regular expression to validate input into a textbox.
I only want to allow valid alpha-numeric characters (no special
characters, such as ?, *, {} [] etc...).

An example would be much-appreciated!
--
WBR,
Michael Nemtsev :: blog: http://spaces.msn.com/laflour

"At times one remains faithful to a cause only because its opponents do not
cease to be insipid." (c) Friedrich Nietzsche

Jul 10 '06 #2

P: n/a
Hi sianan,
You could handle the keypress event and just allow numeric values. You
might also want to allow the delete key. Something like this:

void textBox1_KeyPress(object sender,
System.Windows.Forms.KeyPressEventArgs e)
{
const char Delete = (char)8;
e.Handled = !char.IsDigit(e.KeyChar) && e.KeyChar != Delete;
}

Hope that helps,
John

sianan wrote:
I am looking for a regular expression to validate input into a textbox.
I only want to allow valid alpha-numeric characters (no special
characters, such as ?, *, {} [] etc...).

An example would be much-appreciated!

Thanks!
Jul 10 '06 #3

P: n/a
\w*

--
HTH,

Kevin Spencer
Microsoft MVP
Professional Chicken Salad Alchemist

Big thicks are made up of lots of little thins.
"sianan" <sm*********@tds.netwrote in message
news:11*********************@s13g2000cwa.googlegro ups.com...
>I am looking for a regular expression to validate input into a textbox.
I only want to allow valid alpha-numeric characters (no special
characters, such as ?, *, {} [] etc...).

An example would be much-appreciated!

Thanks!

Jul 10 '06 #4

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