一个UBB类及其使用方法（C#完整版）

先把这个类的源码贴出来，然后再给一个使用例子，供大家参考。

UBB类源码：

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Text.RegularExpressions;

namespace ubb.Components
{
    /// <summary>
    /// myubb 的摘要说明
    /// </summary>
    public class myubb
    {
        public myubb()
        {
            //
            // TODO: 在此处添加构造函数逻辑
            //
        }
        #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

    }

}

下面是调用方法：

 在页面的cs文件中 引入命名空间 using ubb.Components;
然后可以直接这样使用了：Label1.Text = ubb.Components.myubb.UBBToHTML(dr[0].ToString());