asp.Net文字列フィルタ

 /// <summary>
    ///     
    /// </summary>
    /// <param name="NoHTML">  HTML，  ，      ，        </param>
    /// <returns>          </returns>
    public string NoHTML(string Htmlstring)
    {
        if (Htmlstring == null)
        {
            return "";
        }
        else
        {
            //    
            Htmlstring = Regex.Replace(Htmlstring, @"<script[^>]*?>.*?</script>", "", RegexOptions.IgnoreCase);
            //  HTML
            Htmlstring = Regex.Replace(Htmlstring, @"<(.[^>]*)>", "", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"([\r
])[\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 = Regex.Replace(Htmlstring, "xp_cmdshell", "", RegexOptions.IgnoreCase);

            //            
            Htmlstring = Regex.Replace(Htmlstring, "select", "", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, "insert", "", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, "delete from", "", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, "count''", "", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, "drop table", "", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, "truncate", "", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, "asc", "", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, "mid", "", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, "char", "", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, "xp_cmdshell", "", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, "exec master", "", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, "net localgroup administrators", "", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, "and", "", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, "net user", "", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, "or", "", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, "net", "", RegexOptions.IgnoreCase);
            //Htmlstring = Regex.Replace(Htmlstring, "*", "", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, "-", "", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, "delete", "", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, "drop", "", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, "script", "", RegexOptions.IgnoreCase);

            //     
              Htmlstring = Htmlstring.Replace("<", "&lt;");
            Htmlstring = Htmlstring.Replace(">", "&gt;");
            Htmlstring = Htmlstring.Replace("*", "");
            Htmlstring = Htmlstring.Replace("-", "");
            Htmlstring = Htmlstring.Replace("?", "");
            Htmlstring = Htmlstring.Replace(",", "");
            Htmlstring = Htmlstring.Replace("/", "");
            Htmlstring = Htmlstring.Replace(";", "");
            Htmlstring = Htmlstring.Replace("*/", "");
            Htmlstring = Htmlstring.Replace("\r
", "");
            Htmlstring = HttpContext.Current.Server.HtmlEncode(Htmlstring).Trim();

            return Htmlstring;
        }

    }

 
& l t ;<&g t;はい>
カッコです..しかしhtmlコードにはこのように表示されています.例えばホームページの中で"<彼女はとてもきれいです>"htmlの中で"&l t;彼女はとてもきれいです&g t;"
//前の20文字だけを取る_showMessage"title="<%#NoHTML(Eval("?").ToString()%><%#StringComm.OutSubstring(Eval("?").ToString(), 20)%> 
//マウスにテキストを載せるポップアップメッセージ$(function(){$("span[img]=_showMessage")).hover(function(e){this.t=this.title;this.title="""""""";$("body").append("

"+this.t+"

);var d=$(#tooltip").width();             $("#tooltip").css("top", (e.pageY - 20) + "px").css("left", (e.pageX - 80 - d) + "px").fadeIn("fast");         },function() {             this.title = this.t;             $("#tooltip").remove();         });     });