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  • C# 正则表达式类 Match类和Group类

    Match类

    示例:查找出字符串中包含的url

    string text = "FirstUrl: http://www.sohu.com ,SecondUrl: http://www.baidu.com ";
    string pattern = @"(S+)://(S+)"; //匹配URL的模式
    MatchCollection mc = Regex.Matches(text, pattern); //满足pattern的匹配集合
    Console.WriteLine("文本中包含的URL地址有:");
    foreach (Match match in mc)
    {
      Console.WriteLine(match.Value);
    }
    Console.ReadLine();

    结果:

     Group类

    示例:找到字符串中包含的url,并找出每个url的协议和域名地址

    string text = "FirstUrl: http://www.sohu.com ,SecondUrl: http://www.baidu.com ";
    string pattern = @"(?<protocol>S+)://(?<address>S+)"; //匹配URL的模式,并分组
    MatchCollection mc = Regex.Matches(text, pattern); //满足pattern的匹配集合

    Console.WriteLine("文本中包含的URL地址有:");
    foreach (Match match in mc)
    {
      GroupCollection gc = match.Groups;
      string outputText = "URL:" + match.Value + ";Protocol:" + gc["protocol"].Value + ";Address:" + gc["address"].Value;
      Console.WriteLine(outputText); 
    }

    Console.Read();

    说明:"?<protocol>"和"?<address>"定义了每个组的别名protocol和address

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  • 原文地址:https://www.cnblogs.com/tsql/p/6393620.html
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