ＵＢＢ（Ｃ＃）

　　参考了一些文章，整理了一下，大家可以直接拿去用吧，其实自从有了FreeTextBox这样的东东出现，ＵＢＢ已经渐渐淡出江湖了。

using System;
using System.Text;
using System.Text.RegularExpressions;

namespace Test.Com
{
/// <summary>
 /// 功能：UBB代码
 /// 作者：Rexsp
 /// 日期：2004-4-6
 /// </summary>
 public class UBB
 {
  #region 构造函数
  public UBB()
  {
   //
   // TODO: 在此处添加构造函数逻辑
   //
  }
  #endregion

  #region 公共静态方法
  /// <summary>
  /// UBB代码处理函数
  /// </summary>
  /// <param name="sDetail">输入字符串</param>
  /// <returns>输出字符串</returns>
  public static string UBBToHTML(string sDetail)
  {
   Regex r;
   Match m;

   #region 处理空格
   sDetail = sDetail.Replace(" ","&nbsp;");
   #endregion

   #region html标记符
   sDetail = sDetail.Replace("<","&lt;");
   sDetail = sDetail.Replace(">","&gt;");
   #endregion

   #region 处[b][/b]标记
   r = new Regex(@"(\[b\])([ \S\t]*?)(\[\/b\])",RegexOptions.IgnoreCase);
   for (m = r.Match(sDetail); m.Success; m = m.NextMatch())
   {
    sDetail = sDetail.Replace(m.Groups[0].ToString(),"<B>" + m.Groups[2].ToString() + "</B>");
   }
   #endregion

   #region 处[i][/i]标记
   r = new Regex(@"(\[i\])([ \S\t]*?)(\[\/i\])",RegexOptions.IgnoreCase);
   for (m = r.Match(sDetail); m.Success; m = m.NextMatch())
   {
    sDetail = sDetail.Replace(m.Groups[0].ToString(),"<I>" + m.Groups[2].ToString() + "</I>");
   }
   #endregion

   #region 处[u][/u]标记
   r = new Regex(@"(\[U\])([ \S\t]*?)(\[\/U\])",RegexOptions.IgnoreCase);
   for (m = r.Match(sDetail); m.Success; m = m.NextMatch())
   {
    sDetail = sDetail.Replace(m.Groups[0].ToString(),"<U>" + m.Groups[2].ToString() + "</U>");
   }
   #endregion

   #region 处[p][/p]标记
   //处[p][/p]标记
   r = new Regex(@"((\r\n)*\[p\])(.*?)((\r\n)*\[\/p\])",RegexOptions.IgnoreCase|RegexOptions.Singleline);
   for (m = r.Match(sDetail); m.Success; m = m.NextMatch())
   {
    sDetail = sDetail.Replace(m.Groups[0].ToString(),"<P class=\"pstyle\">" + m.Groups[3].ToString() + "</P>");
   }
   #endregion

   #region 处[sup][/sup]标记
   //处[sup][/sup]标记
   r = new Regex(@"(\[sup\])([ \S\t]*?)(\[\/sup\])",RegexOptions.IgnoreCase);
   for (m = r.Match(sDetail); m.Success; m = m.NextMatch())
   {
    sDetail = sDetail.Replace(m.Groups[0].ToString(),"<SUP>" + m.Groups[2].ToString() + "</SUP>");
   }
   #endregion

   #region 处[sub][/sub]标记
   //处[sub][/sub]标记
   r = new Regex(@"(\[sub\])([ \S\t]*?)(\[\/sub\])",RegexOptions.IgnoreCase);
   for (m = r.Match(sDetail); m.Success; m = m.NextMatch())
   {
    sDetail = sDetail.Replace(m.Groups[0].ToString(),"<SUB>" + m.Groups[2].ToString() + "</SUB>");
   }
   #endregion

   #region 处[url][/url]标记
   //处[url][/url]标记
   r = new Regex(@"(\[url\])([ \S\t]*?)(\[\/url\])",RegexOptions.IgnoreCase);
   for (m = r.Match(sDetail); m.Success; m = m.NextMatch())
   {
    sDetail = sDetail.Replace(m.Groups[0].ToString(),
     "<A href=\"" + m.Groups[2].ToString() + "\" target=\"_blank\"><IMG border=0 src=\"images/url.gif\">" +
     m.Groups[2].ToString() + "</A>");
   }
   #endregion

   #region 处[url=xxx][/url]标记
   //处[url=xxx][/url]标记
   r = new Regex(@"(\[url=([ \S\t]+)\])([ \S\t]*?)(\[\/url\])",RegexOptions.IgnoreCase);
   for (m = r.Match(sDetail); m.Success; m = m.NextMatch())
   {
    sDetail = sDetail.Replace(m.Groups[0].ToString(),
     "<A href=\"" + m.Groups[2].ToString() + "\" target=\"_blank\"><IMG border=0 src=\"images/url.gif\">" +
     m.Groups[3].ToString() + "</A>");
   }
   #endregion

   #region 处[email][/email]标记
   //处[email][/email]标记
   r = new Regex(@"(\[email\])([ \S\t]*?)(\[\/email\])",RegexOptions.IgnoreCase);
   for (m = r.Match(sDetail); m.Success; m = m.NextMatch())
   {
    sDetail = sDetail.Replace(m.Groups[0].ToString(),
     "<A href=\"mailto:" + m.Groups[2].ToString() + "\" target=\"_blank\"><IMG border=0 src=\"images/email.gif\">" +
     m.Groups[2].ToString() + "</A>");
   }
   #endregion

   #region 处[email=xxx][/email]标记
   //处[email=xxx][/email]标记
   r = new Regex(@"(\[email=([ \S\t]+)\])([ \S\t]*?)(\[\/email\])",RegexOptions.IgnoreCase);
   for (m = r.Match(sDetail); m.Success; m = m.NextMatch())
   {
    sDetail = sDetail.Replace(m.Groups[0].ToString(),
     "<A href=\"mailto:" + m.Groups[2].ToString() + "\" target=\"_blank\"><IMG border=0 src=\"images/email.gif\">" +
     m.Groups[3].ToString() + "</A>");
   }
   #endregion

   #region 处[size=x][/size]标记
   //处[size=x][/size]标记
   r = new Regex(@"(\[size=([1-7])\])([ \S\t]*?)(\[\/size\])",RegexOptions.IgnoreCase);
   for (m = r.Match(sDetail); m.Success; m = m.NextMatch())
   {
    sDetail = sDetail.Replace(m.Groups[0].ToString(),
     "<FONT SIZE=" + m.Groups[2].ToString() + ">" +
     m.Groups[3].ToString() + "</FONT>");
   }
   #endregion

   #region 处[color=x][/color]标记
   //处[color=x][/color]标记
   r = new Regex(@"(\[color=([\S]+)\])([ \S\t]*?)(\[\/color\])",RegexOptions.IgnoreCase);
   for (m = r.Match(sDetail); m.Success; m = m.NextMatch())
   {
    sDetail = sDetail.Replace(m.Groups[0].ToString(),
     "<FONT COLOR=" + m.Groups[2].ToString() + ">" +
     m.Groups[3].ToString() + "</FONT>");
   }
   #endregion

   #region 处[font=x][/font]标记
   //处[font=x][/font]标记
   r = new Regex(@"(\[font=([\S]+)\])([ \S\t]*?)(\[\/font\])",RegexOptions.IgnoreCase);
   for (m = r.Match(sDetail); m.Success; m = m.NextMatch())
   {
    sDetail = sDetail.Replace(m.Groups[0].ToString(),
     "<FONT FACE=" + m.Groups[2].ToString() + ">" +
     m.Groups[3].ToString() + "</FONT>");
   }
   #endregion

   #region 处理图片链接
   //处理图片链接
   r = new Regex("\\[picture\\](\\d+?)\\[\\/picture\\]",RegexOptions.IgnoreCase);
   for (m = r.Match(sDetail); m.Success; m = m.NextMatch())
   {
    sDetail = sDetail.Replace(m.Groups[0].ToString(),
     "<A href=\"ShowImage.aspx?Type=ALL&Action=forumImage&ImageID=" + m.Groups[1].ToString() +
     "\" target=\"_blank\"><IMG border=0 Title=\"点击打开新窗口查看\" src=\"ShowImage.aspx?Action=forumImage&ImageID=" + m.Groups[1].ToString() +
     "\"></A>");
   }
   #endregion

   #region 处理[align=x][/align]
   //处理[align=x][/align]
   r = new Regex(@"(\[align=([\S]+)\])([ \S\t]*?)(\[\/align\])",RegexOptions.IgnoreCase);
   for (m = r.Match(sDetail); m.Success; m = m.NextMatch())
   {
    sDetail = sDetail.Replace(m.Groups[0].ToString(),
     "<P align=" + m.Groups[2].ToString() + ">" +
     m.Groups[3].ToString() + "</P>");
   }
   #endregion

   #region 处[H=x][/H]标记
   //处[H=x][/H]标记
   r = new Regex(@"(\[H=([1-6])\])([ \S\t]*?)(\[\/H\])",RegexOptions.IgnoreCase);
   for (m = r.Match(sDetail); m.Success; m = m.NextMatch())
   {
    sDetail = sDetail.Replace(m.Groups[0].ToString(),
     "<H" + m.Groups[2].ToString() + ">" +
     m.Groups[3].ToString() + "</H" + m.Groups[2].ToString() + ">");
   }
   #endregion

   #region 处理[list=x][*][/list]
   //处理[list=x][*][/list]
   r = new Regex(@"(\[list(=(A|a|I|i| ))?\]([ \S\t]*)\r\n)((\[\*\]([ \S\t]*\r\n))*?)(\[\/list\])",RegexOptions.IgnoreCase);
   for (m = r.Match(sDetail); m.Success; m = m.NextMatch())
   {
    string strLI = m.Groups[5].ToString();
    Regex rLI = new Regex(@"\[\*\]([ \S\t]*\r\n?)",RegexOptions.IgnoreCase);
    Match mLI;
    for (mLI = rLI.Match(strLI); mLI.Success; mLI = mLI.NextMatch())
    {
     strLI = strLI.Replace(mLI.Groups[0].ToString(),"<LI>" + mLI.Groups[1]);
    }

    sDetail = sDetail.Replace(m.Groups[0].ToString(),
     "<UL TYPE=\"" + m.Groups[3].ToString() + "\"><B>" + m.Groups[4].ToString() + "</B>" +
     strLI + "</UL>");
   }
   #endregion

   #region 处理换行
   //处理换行，在每个新行的前面添加两个全角空格
   r = new Regex(@"(\r\n((&nbsp;)|　)+)(?<正文>\S+)",RegexOptions.IgnoreCase);
   for (m = r.Match(sDetail); m.Success; m = m.NextMatch())
   {
    sDetail = sDetail.Replace(m.Groups[0].ToString(),"<BR>　　" + m.Groups["正文"].ToString());
   }
   //处理换行，在每个新行的前面添加两个全角空格
   sDetail = sDetail.Replace("\r\n","<BR>");
   #endregion

   return sDetail;
  }
  #endregion

 }
}