C#用正则表达式 获取网页源代码标签的属性或值

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>

/// <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>

/// <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;
        }
原文地址:https://www.cnblogs.com/sntetwt/p/3884657.html