去除HTML标记 修改p标签为br，修改br为br，保留img标签

贴上代码，自己看

网络上找的，自己做过一点修改，还是蛮不错的。

///<summary>   
        ///    去除HTML标记   修改p标签为br，修改br为br，保留img标签
        ///</summary>   
        ///<param    name="NoHTML">包括HTML的源码   </param>   
        ///<returns>已经去除后的文字</returns>
        public static string NoHTML(string Htmlstring)
        {


            string[] img = GetIMG(Htmlstring);
            for (int i = 0; i < img.Length; i++)
            {
                if (img[i] == null)
                    break;
                Htmlstring=Htmlstring.Replace(img[i], "img无敌"+i);
            }
            Htmlstring = Htmlstring.Replace("</P>", "1234a3211");
            Htmlstring = Htmlstring.Replace("</p>", "1234a3211");
            Htmlstring = Htmlstring.Replace("<br/>", "1234a3211");
            //删除脚本   
            Htmlstring = Regex.Replace(Htmlstring, @"<script[^>]*?>.*?</script>", "", RegexOptions.IgnoreCase);
            //删除HTML   
            Htmlstring = Regex.Replace(Htmlstring, @"<(.[^>]*)>", "", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"([\r\n])[\s]+", "", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"-->", "", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"<!--.*", "", RegexOptions.IgnoreCase);

            Htmlstring = Regex.Replace(Htmlstring, @"&(quot|#34);", "\"", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"&(amp|#38);", "&", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"&(lt|#60);", "<", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"&(gt|#62);", ">", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"&(nbsp|#160);", "", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"&(iexcl|#161);", "\xa1", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"&(cent|#162);", "\xa2", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"&(pound|#163);", "\xa3", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"&(copy|#169);", "\xa9", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"&#(\d+);", "", RegexOptions.IgnoreCase);

            Htmlstring.Replace("<", "");
            Htmlstring.Replace(">", "");
            Htmlstring.Replace("\r\n", "");
            Htmlstring = Htmlstring.Replace("1234a3211", "<br/>");

            for (int i = 0; i < img.Length; i++)
            {
                if (img[i] == null)
                    break;
                Htmlstring = Htmlstring.Replace("img无敌" + i, img[i]);
            }

            return Htmlstring;
        }