.NET中的UBB代码

public string Texttohtml(string chr)
  {

   if(chr==null)
    return "";
   chr=chr.Replace("<","<");
   chr=chr.Replace(">",">");
   chr=chr.Replace(" ","<br/>");
   chr = Regex.Replace(chr,@"[url=(?<x>[^]]*)](?<y>[^]]*)[/url]",@"<a href=$1 target=_blank>$2</a>",RegexOptions.IgnoreCase);
   chr = Regex.Replace(chr,@"[url](?<x>[^]]*)[/url]",@"<a href=$1 target=_blank>$1</a>",RegexOptions.IgnoreCase);
   chr = Regex.Replace(chr,@"[email=(?<x>[^]]*)](?<y>[^]]*)[/email]",@"<a href=$1>$2</a>",RegexOptions.IgnoreCase);
   chr = Regex.Replace(chr,@"[email](?<x>[^]]*)[/email]",@"<a href=$1>$1</a>",RegexOptions.IgnoreCase);
   chr = Regex.Replace(chr,@"[flash](?<x>[^]]*)[/flash]",@"<OBJECT codeBase=http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=4,0,2,0 classid=clsid:D27CDB6E-AE6D-11cf-96B8-444553540000 width=500 height=400><PARAM NAME=movie VALUE=""$1""><PARAM NAME=quality VALUE=high><embed src=""$1"" quality=high pluginspage=http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash type=application/x-shockwave-flash width=500 height=400>$1</embed></OBJECT>",RegexOptions.IgnoreCase);
   chr = Regex.Replace(chr,@"[img](?<x>[^]]*)[/img]",@"<IMG SRC=""$1"" border=0>",RegexOptions.IgnoreCase);
   chr = Regex.Replace(chr,@"[color=(?<x>[^]]*)](?<y>[^]]*)[/color]",@"<font color=$1>$2</font>",RegexOptions.IgnoreCase);
   chr = Regex.Replace(chr,@"[face=(?<x>[^]]*)](?<y>[^]]*)[/face]",@"<font face=$1>$2</font>",RegexOptions.IgnoreCase);
   chr = Regex.Replace(chr,@"[size=1](?<x>[^]]*)[/size]",@"<font size=1>$1</font>",RegexOptions.IgnoreCase);
   chr = Regex.Replace(chr,@"[size=2](?<x>[^]]*)[/size]",@"<font size=2>$1</font>",RegexOptions.IgnoreCase);
   chr = Regex.Replace(chr,@"[size=3](?<x>[^]]*)[/size]",@"<font size=3>$1</font>",RegexOptions.IgnoreCase);
   chr = Regex.Replace(chr,@"[size=4](?<x>[^]]*)[/size]",@"<font size=4>$1</font>",RegexOptions.IgnoreCase);
   chr = Regex.Replace(chr,@"[align=(?<x>[^]]*)](?<y>[^]]*)[/align]",@"<align=$1>$2</align>",RegexOptions.IgnoreCase);
   chr = Regex.Replace(chr,@"[fly](?<x>[^]]*)[/fly]",@"<marquee width=90% behavior=alternate scrollamount=3>$1</marquee>",RegexOptions.IgnoreCase);
   chr = Regex.Replace(chr,@"[move](?<x>[^]]*)[/move]",@"<marquee scrollamount=3>$1</marquee>",RegexOptions.IgnoreCase);
   chr = Regex.Replace(chr,@"[glow=(?<x>[^]]*),(?<y>[^]]*),(?<z>[^]]*)](?<w>[^]]*)[/glow]",@"<table width=$1 style=filter:glow(color=$2, strength=$3)>$4</table>",RegexOptions.IgnoreCase);
   chr = Regex.Replace(chr,@"[shadow=(?<x>[^]]*),(?<y>[^]]*),(?<z>[^]]*)](?<w>[^]]*)[/shadow]",@"<table width=$1 style=filter:shadow(color=$2, strength=$3)>$4</table>",RegexOptions.IgnoreCase);
   chr = Regex.Replace(chr,@"[b](?<x>[^]]*)[/b]",@"<b>$1</b>",RegexOptions.IgnoreCase);
   chr = Regex.Replace(chr,@"[i](?<x>[^]]*)[/i]",@"<i>$1</i>",RegexOptions.IgnoreCase);
   chr = Regex.Replace(chr,@"[u](?<x>[^]]*)[/u]",@"<u>$1</u>",RegexOptions.IgnoreCase);
   chr = Regex.Replace(chr,@"[code](?<x>[^]]*)[/code]",@"<pre id=code><font size=1 face=Verdana, Arial id=code>$1</font id=code></pre id=code>",RegexOptions.IgnoreCase);
   chr = Regex.Replace(chr,@"[list](?<x>[^]]*)[/list]",@"<ul>$1</ul>",RegexOptions.IgnoreCase);
   chr = Regex.Replace(chr,@"[list=1](?<x>[^]]*)[/list]",@"<ol type=1>$1</ol id=1>",RegexOptions.IgnoreCase);
   chr = Regex.Replace(chr,@"[list=a](?<x>[^]]*)[/list]",@"<ol type=a>$1</ol id=a>",RegexOptions.IgnoreCase);
   chr = Regex.Replace(chr,@"[*](?<x>[^]]*)[/*]",@"<li>$1</li>",RegexOptions.IgnoreCase);
   chr = Regex.Replace(chr,@"[quote](?<x>.*)[/quote]",@"<center>—— 以下是引用 ——<table border=1 width=80% cellpadding=10 cellspacing=0 ><tr><td>$1</td></tr></table></center>",RegexOptions.IgnoreCase);
   return(chr);
  }
  public string htmltoText(string chr)
  {
   if(chr==null)
    return "";
   chr=chr.Replace("","");
   return(chr);
  }

补充：Web开发 , ASP.Net ,