Asp.net中如何过滤html,js,css代码

  #region/// 过滤html,js,css代码
   /// <summary>
   /// 过滤html,js,css代码
   /// </summary>
   /// <param name="html">参数传入</param>
   /// <returns></returns>
   public static string CheckStr(string html)
   {
   System.Text.RegularExpressions.Regex regex1 = new System.Text.RegularExpressions.Regex(@"<script[\s\S]+</script *>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
   System.Text.RegularExpressions.Regex regex2 = new System.Text.RegularExpressions.Regex(@" href *= *[\s\S]*script *:", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
   System.Text.RegularExpressions.Regex regex3 = new System.Text.RegularExpressions.Regex(@" no[\s\S]*=", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
   System.Text.RegularExpressions.Regex regex4 = new System.Text.RegularExpressions.Regex(@"<iframe[\s\S]+</iframe *>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
   System.Text.RegularExpressions.Regex regex5 = new System.Text.RegularExpressions.Regex(@"<frameset[\s\S]+</frameset *>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
   System.Text.RegularExpressions.Regex regex6 = new System.Text.RegularExpressions.Regex(@"\<img[^\>]+\>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
   System.Text.RegularExpressions.Regex regex7 = new System.Text.RegularExpressions.Regex(@"</p>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
   System.Text.RegularExpressions.Regex regex8 = new System.Text.RegularExpressions.Regex(@"<p>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
   System.Text.RegularExpressions.Regex regex9 = new System.Text.RegularExpressions.Regex(@"<[^>]*>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
   html = regex1.Replace(html, ""); //过滤<script></script>标记
   html = regex2.Replace(html, ""); //过滤href=javascript: (<A>) 属性
   html = regex3.Replace(html, " _disibledevent="); //过滤其它控件的on...事件
   html = regex4.Replace(html, ""); //过滤iframe
   html = regex5.Replace(html, ""); //过滤frameset
   html = regex6.Replace(html, ""); //过滤frameset
   html = regex7.Replace(html, ""); //过滤frameset
   html = regex8.Replace(html, ""); //过滤frameset
   html = regex9.Replace(html, "");
   html = html.Replace(" ", "");
   html = html.Replace("</strong>", "");
   html = html.Replace("<strong>", "");
   return html;
   }
   #endregion
   #region /// 过滤p /p代码
   /// <summary>
   /// 过滤p /p代码
   /// </summary>
   /// <param name="html">参数传入</param>
   /// <returns></returns>
   public static string InputStr(string html)
   {
   html = html.Replace(@"\<img[^\>]+\>", "");
   html = html.Replace(@"<p>", "");
   html = html.Replace(@"</p>", "");
   return html;
   }
   #endregion
  
   /// <summary>
   /// 截取字符串
   /// </summary>
   /// <param name="str"></param>
   /// <param name="length"></param>
   /// <returns></returns>
   protected string GetLength(string str, int length)
   {
   string strR = str;
   if (str.Length > length)
   {
   strR = str.Substring(0, length) + "...";
   }
   return strR;
   }