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1163360
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0
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0
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2009-07-22T06:24:48.890
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2009-07-22T09:54:51.463
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2009-07-22T09:54:51.463
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3957
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3957
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1163344
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2
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<p>If you want to retrieve a specific group name you can use the <a href="http://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex.aspx" rel="noreferrer"><code>Regex</code></a><code>.</code><a href="http://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex.groupnamefromnumber.aspx" rel="noreferrer"><code>GroupNameFromNumber</code></a> method.</p> <pre><code>//regular expression with a named group Regex regex = new Regex(@"(?<Type1>AAA)|(?<Type2>BBB)", RegexOptions.Compiled); //evaluate results of Regex and for each match foreach (Match m in regex.Matches("AAABBBAAA")) { //loop through all the groups in current match for(int x = 1; x < m.Groups.Count; x ++) { //print the names wherever there is a succesful match if(m.Group[x].Success) Console.WriteLine(regex.GroupNameFromNumber(x)); } } </code></pre> <p>Also, There is a string indexer on the <a href="http://msdn.microsoft.com/en-us/library/system.text.regularexpressions.groupcollection.aspx" rel="noreferrer"><code>GroupCollection</code></a>. object that is accesible on the <a href="http://msdn.microsoft.com/en-us/library/system.text.regularexpressions.match.aspx" rel="noreferrer"><code>Match</code></a><code>.</code><a href="http://msdn.microsoft.com/en-us/library/system.text.regularexpressions.match.groups.aspx" rel="noreferrer"><code>Groups</code></a> property, this allows you to access a group in a match by name instead of by index.</p> <pre><code>//regular expression with a named group Regex regex = new Regex(@"(?<Type1>AAA)|(?<Type2>BBB)", RegexOptions.Compiled); //evaluate results of Regex and for each match foreach (Match m in regex.Matches("AAABBBAAA")) { //print the value of the named group if(m.Groups["Type1"].Success) Console.WriteLine(m.Groups["Type1"].Value); if(m.Groups["Type2"].Success) Console.WriteLine(m.Groups["Type2"].Value); } </code></pre>
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1. PORegex: How to get a group name
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