Question

Problem:
Current regex pattern does not filter all lines. Adding ^ to the beginning and $ to the ending of the pattern seems to break it as well. If I try it on http://www.regexlib.com it gives partial results using options(multiline & case insensitive). Using it in the application returns nothing at all.

Questions:

1. Why is this regex not working with
   all lines and partially giving results.
2. I thought this was .NET regex
   engine. Why does it work there and
   not here???
3. Am I missing proper syntax or is the
   pattern just missing sommething
   crucial?? Regex always drives me crazy…

// Format: (KB980218)
//
// Example:
Security Update for Windows 7 for x64-based Systems (KB2479943)
Security Update for Windows 7 for x64-based Systems (KB2479943)
Windows Malicious Software Removal Tool x64 – March 2011 (KB890830)
Update for Microsoft Silverlight (KB2495644)
Security Update for Windows 7 for x64-based Systems (KB2483614)
Cumulative Security Update for Internet Explorer 8 for Windows 7 for x64-based Systems (KB2482017)
Security Update for Windows 7 for x64-based Systems (KB2425227)
Windows Malicious Software Removal Tool x64 – February 2011 (KB890830)
Security Update for Windows 7 for x64-based Systems (KB2479628)
Update for Windows 7 for x64-based Systems (KB2467023)
Windows Live Essentials 2011 (KB2434419)
Update for Windows 7 for x64-based Systems (KB2454826)
Security Update for Windows 7 for x64-based Systems (KB2475792)
Security Update for Windows 7 for x64-based Systems (KB2393802)
Security Update for Windows 7 for x64-based Systems (KB2485376)
Update for Windows 7 for x64-based Systems (KB976902)
Windows Malicious Software Removal Tool x64 – January 2011 (KB890830)
Security Update for Windows 7 for x64-based Systems (KB2419640)
Update for Internet Explorer 8 Compatibility View List for Windows 7 for x64-based Systems (KB2447568)
Cumulative Update for Media Center for Windows 7 x64-based Systems (KB2284742)
Update for Microsoft Silverlight (KB2477244)

Testing this function returns the title but no kb article number.

==================================================================================
Title:Security Update for Windows 7 for x64-based Systems (KB2479943)
KB#:
==================================================================================
Title:Windows Malicious Software Removal Tool x64 – March 2011 (KB890830)
KB#:
==================================================================================
Title:Update for Microsoft Silverlight (KB2495644)
KB#:
==================================================================================

//Main Method output example
Console.WriteLine("=====================================================================================");
foreach (string s in KbUpdates)
{
    string format = string.Format("Title:{0}\r\nKB#:{1}", s, GrabKBUpdate(s.ToString()));

    Console.WriteLine(format);
    Console.WriteLine("=====================================================================================");
}

public static string GrabKBUpdate(string updatestring)
{
    string result = null;
    string pattern = @"(((\w{2}\d{6}) ?)";
    string input = updatestring;
    Regex rgx = new Regex(pattern, RegexOptions.IgnoreCase);
    MatchCollection matches = rgx.Matches(input);

    if (matches.Count > 0)
    {
        foreach (Match match in matches)
           result = match.Value;
        return result;
    }
    return result;

}

Using this method above I get nothing. Using the below pattern on http://www.regexlib.com online regex tester for .net I only get partial results.

Matches for pattern: (((\w{2}\d{6}) ?)

Match   $1  $2
(KB890830)  (KB890830)  (KB890830)
(KB890830)  (KB890830)  (KB890830)
(KB976902)  (KB976902)  (KB976902)
(KB890830)  (KB890830)  (KB890830)

Answer 1

It ended up that the pattern needed was (KB\d+). Thanks anyways.