C#去掉HTML标记

(1)方法一

public string RemoveHTMLTags(string htmlStream)
        {
            if (htmlStream == null)
            {
                throw new Exception("Your input html stream is null!");
                return null;
            }

            /*
             * 最好把所有的特殊HTML标记都找出来，然后把与其相对应的Unicode字符一起影射到Hash表内，最后一起都替换掉
             */

//先单独测试,成功后,再把所有模式合并

            //注:这两个必须单独处理
            //去掉嵌套了HTML标记的JavaScript:(<script)[\s\S]*(</script>)
            //去掉css标记:(<style)[\s\S]*(</style>)
            //去掉css标记:\..*\{[\s\S]*\}
            htmlStream = Regex.Replace(htmlStream, "(<script)[\s\S]*?(</script>)|(<style)[\s\S]*?(</style>)", " ", RegexOptions.IgnoreCase);
            //htmlStream = RemoveTag(htmlStream, "script");
            //htmlStream = RemoveTag(htmlStream, "style");

            //去掉普通HTML标记:<[^>]+>
            //替换空格: |&|| |
            htmlStream = Regex.Replace(htmlStream, "<[^>]+>| |&|| ||•|<|>", " ", RegexOptions.IgnoreCase);
            //htmlStream = RemoveTag(htmlStream);

//替换左尖括号
//htmlStream = Regex.Replace(htmlStream, "<", "<");

//替换右尖括号
//htmlStream = Regex.Replace(htmlStream, ">", ">");

            //替换空行
            //htmlStream = Regex.Replace(htmlStream, "[ | | ]", " ");//[ | ][ *| *]*[ | ]
            htmlStream = Regex.Replace(htmlStream, "( [ | | | ]* )|( [ | | | ]* )", " ");
            htmlStream = Regex.Replace(htmlStream, "[ | ]{1,}", " ");

return htmlStream.Trim();
}

（2）网上搜索到的方法

// 除去所有在html元素中标记
    public static string striphtml(string strhtml)
    {
        string stroutput = strhtml;
        Regex regex = new Regex(@"<[^>]+>|</[^>]+>");

stroutput = regex.Replace(stroutput, "");
return stroutput;

}