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Help with RegExp conversion from PhP to VB

philggg
philggg asked
on
Medium Priority
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Last Modified: 2010-04-07
I am transfering over a regular expresion from php to VB (I am using it to block cross site scripting on a web page)
The original php epresion is:
$string = preg_replace('#(<[^>]+)style[\x00-\x20]*=[\x00-\x20]*([\`\'\"]*).*expression[\x00-\x20]*\([^>]*>#iU',"$1>",$string);

My VB version using RegExp
regex.Pattern = "#([a-z]*)[\x00-\x20]*=[\x00-\x20]*([\`\'\""]*)[\\x00-\x20]*j[\x00-\x20]*a[\x00-\x20]*v[\x00-\x20]*a[\x00-\x20]*s[\x00-\x20]*c[\x00-\x20]*r[\x00-\x20]*i[\x00-\x20]*p[\x00-\x20]*t[\x00-\x20]*:#iU"
oldstring = regex.Replace(oldstring, "$1=$2nojavascript...>")
(note I replaced the single apostrophe with a double)
I get a very unhelpful error from VB:
Application-defined or object-defined error

Two questions:
What is wrong with my pattern?
How do I get more helpful error messages out of RegExp?
thanks
Phil

Comment
Watch Question

Please try this

regex.Pattern = "#([a-z]*)[\x00-\x20]*=[\x00-\x20]*([\`\'\" & chr(34) & chr(34) & _
    "]*)[\\x00-\x20]*j[\x00-\x20]*a[\x00-\x20]*v[\x00-\x20]*a[\x00-\x20]*s[\x00-\x20]*c[\x00-\x20]*r[\x00-\x20]*i[\x00-\x20]*p[\x00-\x20]*t[\x00-\x20]*:#iU"


I hope this will help u.

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CERTIFIED EXPERT
Commented:
Hi Phil,

I noticed your 3rd block of hex 0-20 has two \ symbols, that should only be one:
 [\\x00-\x20]

To:
 [\x00-\x20]

The rest of it looks syntactically correct at least.
Matt
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