How do I get the name of captured groups in a C# Regex?

c#, regex

Solution

Use GetGroupNames to get the list of groups in an expression and then iterate over those, using the names as keys into the groups collection.

For example,

GroupCollection groups = regex.Match(line).Groups;

foreach (string groupName in regex.GetGroupNames())
{
    Console.WriteLine(
       "Group: {0}, Value: {1}",
       groupName,
       groups[groupName].Value);
}

Problem

Is there a way to get the name of a captured group in C#? ``` string line = "No.123456789 04/09/2009 999"; Regex regex = new Regex(@"(?<number>[\d]{9}) (?<date>[\d]{2}/[\d]{2}/[\d]{4}) (?<code>.*)"); GroupCollection groups = regex.Match(line).Groups; foreach (Group group in groups) { Console.WriteLine("Group: {0}, Value: {1}", ???, group.Value); } ``` I want to get this result: ``` Group: [I don´t know what should go here], Value: 123456789 04/09/2009 999 Group: number, Value: 123456789 Group: date, Value: 04/09/2009 Group: code, Value: 999 ```

Original source