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Match.Groups Property

Gets a collection of groups matched by the regular expression.

Namespace: System.Text.RegularExpressions
Assembly: System (in system.dll)

public virtual GroupCollection Groups { get; }
/** @property */
public GroupCollection get_Groups ()

public function get Groups () : GroupCollection

Not applicable.

Property Value

The character groups matched by the pattern.

The GroupCollection object returned by the Match.Groups property always has at least one member. If the regular expression engine cannot find any matches in a particular input string, the Group.Success property of the single Group object in the collection is set to False and the Group object's Value property is set to String.Empty.

The following example attempts to match a regular expression pattern against a sample string. The example uses the Groups property to store information retrieved by the match for display to the console.

string text = "One car red car blue car";
string pat = @"(\w+)\s+(car)";
// Compile the regular expression.
Regex r = new Regex(pat, RegexOptions.IgnoreCase);
// Match the regular expression pattern against a text string.
Match m = r.Match(text);
int matchCount = 0;
while (m.Success) 
{
   Console.WriteLine("Match"+ (++matchCount));
   for (int i = 1; i <= 2; i++) 
   {
      Group g = m.Groups[i];
      Console.WriteLine("Group"+i+"='" + g + "'");
      CaptureCollection cc = g.Captures;
      for (int j = 0; j < cc.Count; j++) 
      {
         Capture c = cc[j];
         System.Console.WriteLine("Capture"+j+"='" + c + "', Position="+c.Index);
      }
   }
   m = m.NextMatch();
}
   //This code produces output similar to the following; 
   //results may vary based on the computer/file structure/etc.:
   //
   //Match1
   //Group1='One'
   //Capture0='One', Position=0
   //Group2='car'
   //Capture0='car', Position=4
   //Match2
   //Group1='red'
   //Capture0='red', Position=8
   //Group2='car'
   //Capture0='car', Position=12
   //Match3
   //Group1='blue'
   //Capture0='blue', Position=16
   //Group2='car'
   //Capture0='car', Position=21

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

XNA Framework

Supported in: 1.0
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