C#删除所有的Html标记,或者删除特定标记

C#删除所有的Html标记,或者删除特定标记 

C#删除所有的Html标记

删除字符串中的特定标记 

删除字符串中的一组标记 

方法示例：

   /// <summary>
        /// 删除所有的html标记 
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static string DelHtmlString(string str)
        {
            string[] Regexs =
                                {
                                    @"<script[^>]*?>.*?</script>",
                                    @"<(\/\s*)?!?((\w+:)?\w+)(\w+(\s*=?\s*(([""'])(\\[""'tbnr]|[^\7])*?\7|\w+)|.{0})|\s)*?(\/\s*)?>",
                                    @"([\r\n])[\s]+",
                                    @"&(quot|#34);",
                                    @"&(amp|#38);",
                                    @"&(lt|#60);",
                                    @"&(gt|#62);",
                                    @"&(nbsp|#160);",
                                    @"&(iexcl|#161);",
                                    @"&(cent|#162);",
                                    @"&(pound|#163);",
                                    @"&(copy|#169);",
                                    @"&#(\d+);",
                                    @"-->",
                                    @"<!--.*\n"
                                };

            string[] Replaces =
                                {
                                    "",
                                    "",
                                    "",
                                    "\"",
                                    "&",
                                    "<",
                                    ">",
                                    " ",
                                    "\xa1", //chr(161),
                                    "\xa2", //chr(162),
                                    "\xa3", //chr(163),
                                    "\xa9", //chr(169),
                                    "",
                                    "\r\n",
                                    ""
                                };

            string s = str;
            for (int i = 0; i < Regexs.Length; i++)
            {
                s = new Regex(Regexs[i], RegexOptions.Multiline | RegexOptions.IgnoreCase).Replace(s, Replaces[i]);
            }
            s.Replace("<", "");
            s.Replace(">", "");
            s.Replace("\r\n", "");
            return s;
        }

        /// <summary>
        /// 删除字符串中的特定标记 
        /// </summary>
        /// <param name="str"></param>
        /// <param name="tag"></param>
        /// <param name="isContent">是否清除内容 </param>
        /// <returns></returns>
        public static string DelTag(string str, string tag, bool isContent)
        {
            if (tag == null || tag == " ")
            {
                return str;
            }

            if (isContent) //要求清除内容 
            {
                return Regex.Replace(str, string.Format("<({0})[^>]*>([\\s\\S]*?)<\\/\\1>", tag), "", RegexOptions.IgnoreCase);
            }

            return Regex.Replace(str, string.Format(@"(<{0}[^>]*(>)?)|(</{0}[^>] *>)|", tag), "", RegexOptions.IgnoreCase);
        }

        /// <summary>
        /// 删除字符串中的一组标记 
        /// </summary>
        /// <param name="str"></param>
        /// <param name="tagA"></param>
        /// <param name="isContent">是否清除内容 </param>
        /// <returns></returns>
        public static string DelTagArray(string str, string tagA, bool isContent)
        {

            string[] tagAa = tagA.Split(',');

            foreach (string sr1 in tagAa) //遍历所有标记，删除 
            {
                str = DelTag(str, sr1, isContent);
            }
            return str;

        }