How Do I Access Named Capturing Groups in .NET Regex Matches?

Accessing named capturing groups in .NET regular expressions

When parsing data using regular expressions in C#, capturing groups can be used to extract specific parts of a matching string. Named capturing groups allow easier and more meaningful access to these subgroups.

Question

Despite creating a regular expression with a named capture group, accessing a captured value using a CaptureCollection always returns the entire matching row.

Solution

To access a named capturing group, use the GroupCollection property of the Match object. This collection provides direct access to named subgroups within a match. The following code snippet demonstrates this:

<code class="language-C#">foreach (Match m in mc)
{
    // 访问 "link" 组
    MessageBox.Show(m.Groups["link"].Value);

    // 访问 "name" 组
    MessageBox.Show(m.Groups["name"].Value);
}</code>

By referencing the group name as an index in a GroupCollection, you can retrieve the captured value for each specified subgroup in the matching row.

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