(string Htmlstring)可不可以保留<a> <b> <p> <strong> <img>

(string Htmlstring)能否保留<a> <b> <p> <strong> <img> <script src="/*.js"></script>

能否保留<a> <b> <p> <strong> <img> <script src="/*.js"></script>这几个标签呢 


public static string NoHTML(string Htmlstring)
    {
   
              //删除脚本   
 
             Htmlstring = Regex.Replace(Htmlstring, @"<script[^>]*?>.*?</script>", "", RegexOptions.IgnoreCase);
 
             //删除HTML   
            // Htmlstring.Replace("</p>", "</p>\r\n");
   Htmlstring = Regex.Replace(Htmlstring, @"</p>", "</p>:hn", RegexOptions.IgnoreCase);
    // Htmlstring = Regex.Replace(Htmlstring, @"<div>", "", RegexOptions.IgnoreCase);
// Htmlstring = Regex.Replace(Htmlstring, @"</div>", "", RegexOptions.IgnoreCase);
   Htmlstring = Regex.Replace(Htmlstring, @"<(meta)[^>]*>", "", RegexOptions.IgnoreCase);

Htmlstring.Replace("<div>", "");
Htmlstring.Replace("</div>", "");
              Htmlstring = Regex.Replace(Htmlstring, @"<(.[^>]*)>", "", RegexOptions.IgnoreCase);
   
          //   Htmlstring = Regex.Replace(Htmlstring, @"([\r\n])[\s]+", "<br>", 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, @"&(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, @"(\r\n)*", "", RegexOptions.IgnoreCase);
    Htmlstring = Regex.Replace(Htmlstring, @"(\s)", "", RegexOptions.IgnoreCase);
             Htmlstring = Regex.Replace(Htmlstring, @"&#(\d+);", "", RegexOptions.IgnoreCase);
      Htmlstring = Regex.Replace(Htmlstring, @"&(rdquo);", "”", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(ldquo);", "“", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(mdash);", "—", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(hellip);", "…", RegexOptions.IgnoreCase);
             Htmlstring.Replace("<", "");
 
             Htmlstring.Replace(">", "");
   
 Htmlstring = Regex.Replace(Htmlstring, @":hn", "<br>&nbsp;&nbsp;", RegexOptions.IgnoreCase);
           //  Htmlstring.Replace(":hn", "<br>");
 // Htmlstring = Regex.Replace(Htmlstring, @"&(lt|#60);", "<", RegexOptions.IgnoreCase);
            // Htmlstring = Regex.Replace(Htmlstring, @"&(gt|#62);", ">", RegexOptions.IgnoreCase);

// Htmlstring = Regex.Replace(Htmlstring, @"&lt;", "<", RegexOptions.IgnoreCase);
// Htmlstring = Regex.Replace(Htmlstring, @"&gt;", ">", RegexOptions.IgnoreCase);
// Htmlstring.Replace("&lt;", "<");
//  Htmlstring.Replace("&gt;", ">");
            // Htmlstring = System.Web.HttpContext.Current.Server.HtmlEncode(Htmlstring).Trim();
 
 
             return Htmlstring;


    }




[解决办法]
        public static string GetTextFromHTML(string HTML)
        {
            System.Text.RegularExpressions.Regex regEx = new System.Text.RegularExpressions.Regex(@"</?(?!br
[解决办法]
/?p
[解决办法]
img
[解决办法]
string
[解决办法]
a
[解决办法]
script)[^>]*>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);

            return regEx.Replace(HTML, "");
        }