以前做项目时，曾经遇到一个问题，就是要一段含html的文本中html的标签清除掉，并将清除后的文本显示在winform的Label上面。当时在网上搜寻了好久，终于找到了点资料，自己好好对照整理了下，现在分享给大家： 

       

/// <summary>
        /// 清除文本中Html的标签
        /// </summary>
        /// <param name="Content"></param>
        /// <returns></returns>
        private string ClearHtml(string Content)
        {
            Content = Zxj_ReplaceHtml("&#[^>]*;", "", Content);
            Content = Zxj_ReplaceHtml("</?marquee[^>]*>", "", Content);
            Content = Zxj_ReplaceHtml("</?object[^>]*>", "", Content);
            Content = Zxj_ReplaceHtml("</?param[^>]*>", "", Content);
            Content = Zxj_ReplaceHtml("</?embed[^>]*>", "", Content);
            Content = Zxj_ReplaceHtml("</?table[^>]*>", "", Content);
            Content = Zxj_ReplaceHtml("&nbsp;", "", Content);
            Content = Zxj_ReplaceHtml("</?tr[^>]*>", "", Content);
            Content = Zxj_ReplaceHtml("</?th[^>]*>", "", Content);
            Content = Zxj_ReplaceHtml("</?p[^>]*>", "", Content);
            Content = Zxj_ReplaceHtml("</?a[^>]*>", "", Content);
            Content = Zxj_ReplaceHtml("</?img[^>]*>", "", Content);
            Content = Zxj_ReplaceHtml("</?tbody[^>]*>", "", Content);
            Content = Zxj_ReplaceHtml("</?li[^>]*>", "", Content);
            Content = Zxj_ReplaceHtml("</?span[^>]*>", "", Content);
            Content = Zxj_ReplaceHtml("</?div[^>]*>", "", Content);
            Content = Zxj_ReplaceHtml("</?th[^>]*>", "", Content);
            Content = Zxj_ReplaceHtml("</?td[^>]*>", "", Content);
            Content = Zxj_ReplaceHtml("</?script[^>]*>", "", Content);
            Content = Zxj_ReplaceHtml("(javascript|jscript|vbscript|vbs):", "", Content);
            Content = Zxj_ReplaceHtml("on(mouse|exit|error|click|key)", "", Content);
            Content = Zxj_ReplaceHtml("<\\?xml[^>]*>", "", Content);
            Content = Zxj_ReplaceHtml("<\\/?[a-z]+:[^>]*>", "", Content);
            Content = Zxj_ReplaceHtml("</?font[^>]*>", "", Content);
            Content = Zxj_ReplaceHtml("</?b[^>]*>", "", Content);
            Content = Zxj_ReplaceHtml("</?u[^>]*>", "", Content);
            Content = Zxj_ReplaceHtml("</?i[^>]*>", "", Content);
            Content = Zxj_ReplaceHtml("</?strong[^>]*>", "", Content);
            string clearHtml = Content;
            return clearHtml;
        }

    }

 

/// <summary>
        /// 清除文本中的Html标签
        /// </summary>
        /// <param name="patrn">要替换的标签正则表达式</param>
        /// <param name="strRep">替换为的内容</param>
        /// <param name="content">要替换的内容</param>
        /// <returns></returns>
        private string Zxj_ReplaceHtml(string patrn, string strRep, string content)
        {
            if (string.IsNullOrEmpty(content))
            {
                content = "";
            }
            Regex rgEx = new Regex(patrn, RegexOptions.IgnoreCase);
            string strTxt = rgEx.Replace(content, strRep);
            return strTxt;
        }