C#用正则表达式 获取标签的属性或值

整理两个 在C#中,用正则表达式 获取网页源代码标签的属性或值的方法 :

1、获取标签中的值: <a href="www.csdn.net" class="main" >CSDN</a> 结果:CSDN

 

/// <summary>  
/// 获取字符中指定标签的值  
/// </summary>  
/// <param name="str">字符串</param>  
/// <param name="title">标签</param>  
/// <returns>值</returns>  
public static string GetTitleContent(string str, string title)  
{  
    string tmpStr = string.Format("<{0}[^>]*?>(?<Text>[^<]*)</{1}>", title, title); //获取<title>之间内容  

    Match TitleMatch = Regex.Match(str, tmpStr, RegexOptions.IgnoreCase);  

    string result = TitleMatch.Groups["Text"].Value;  
    return result;  
}

  2、获取标签中的属性: <a href="www.csdn.net" class="main">CSDN</a>  获取 “href” 的结果:www.csdn.net  

/// <summary>  
/// 获取字符中指定标签的值  
/// </summary>  
/// <param name="str">字符串</param>  
/// <param name="title">标签</param>  
/// <param name="attrib">属性名</param>  
/// <returns>属性</returns>  
public static string GetTitleContent(string str, string title,string attrib)  
{  

    string tmpStr = string.Format("<{0}[^>]*?{1}=(['\"\"]?)(?<url>[^'\"\"\\s>]+)\\1[^>]*>", title, attrib); //获取<title>之间内容  

    Match TitleMatch = Regex.Match(str, tmpStr, RegexOptions.IgnoreCase);  

    string result = TitleMatch.Groups["url"].Value;  
    return result;  
}

  http://www.cnblogs.com/vipsoft/p/3236960.html

posted @ 2017-10-27 14:13  y_kami  阅读(260)  评论(0编辑  收藏  举报