Validate Url And IP Address With RegEx?

Nov 25, 2010

I'm having some problems with validating Urls and IP addresses with RegEx.

This regular expression doesn't work properly. For example, it returns True for "www.123.123.123.123" and "http://www.123.123.123.123".

vb.net
Regex.IsMatch(txtTextBox.Text, "(((http|https)://)|(www.))+(([a-zA-Z0-9._-]+.[a-zA-Z]{2,6})|([0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}))")

[Code]....

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