随手正则写的 CSDN【只看楼主】功能

写这个的时候居然没有看到原来CSDN已经有这个功能了，写完代码了突然发现原来早就已经有了。

现把代码贴出来吧，虽然有很多解析HTML的开源类库如:http://htmlagilitypack.codeplex.com/，但我一直习惯于正则匹配。

截图：

呵呵，起码还能看吧@——#

 private void button1_Click(object sender, EventArgs e)
         {
             if (!string.IsNullOrEmpty(txtCsdnUrl.Text.Trim()))
             {
                 string url = txtCsdnUrl.Text.Trim();
                 string htmlSource = string.Empty;
                 htmlSource = GetHtmlSource(url);
                 int pageCount = GetPageCount(htmlSource);
                 string context = string.Empty;

                 if (pageCount > )
                 {
                     for (int i = ; i <= pageCount; i++)
                     {
                         htmlSource = GetHtmlSource(url + "?page=" + i);

                        context+= GetLZArticle(htmlSource);
                     }
                 }
                 else
                 {
                     context += GetLZArticle(htmlSource);
                 }

                 richTextBox1.Text = context;

             }
             else
             {
                 MessageBox.Show("请输入地址");
             }
         }

         /// <summary>
         /// 获取源代码
         /// </summary>
         /// <param name="Url"></param>
         /// <returns></returns>
         public string GetHtmlSource(string Url)
         {
             WebClient client = new WebClient();
             client.Headers.Add("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; .NET CLR 1.0.3705;)");
             Stream data = client.OpenRead(Url);
             string result = string.Empty;
             using (StreamReader reader = new StreamReader(data, Encoding.UTF8))
             {
                 result = reader.ReadToEnd();
             }

             return result;
         }

         /// <summary>
         /// 获取贴子总页数 URL格式:http://bbs.csdn.net/topics/390730011?page=2
         /// </summary>
         /// <returns>返回最大页数</returns>
         public int GetPageCount(string HtmlSource)
         {
             int pageCount = ;

             Regex reg = new Regex("<select class=\"jumpMenu\" name=\"jumpMenu\">(?<val>.*?)</select>", RegexOptions.Singleline | RegexOptions.IgnoreCase);
             string htmlSource = HtmlSource;
             Regex reg1 = new Regex("<option.*?>(?<val>.*?)</option>", RegexOptions.Singleline | RegexOptions.IgnoreCase);
             int count = reg1.Matches(reg.Match(htmlSource).Groups["val"].Value).Count;

             int.TryParse(reg1.Matches(reg.Match(htmlSource).Groups["val"].Value)[count - ].Groups["val"].Value,
                          out pageCount);

             return pageCount;
         }

         /// <summary>
         /// 获取文章标题
         /// </summary>
         /// <param name="HtmlSource">网页内容</param>
         /// <returns></returns>
         public string GetArticleTitle(string HtmlSource)
         {
             string title = string.Empty;

             Regex reg = new Regex("<span class=\"title text_overflow\">(?<title>.*?)</span>", RegexOptions.Singleline | RegexOptions.IgnoreCase);

             title = reg.Match(HtmlSource).Groups["title"].Value;

             return title;
         }

         public string GetAuthorName(string HtmlSource)
         {
             string result = string.Empty;

             Regex regex = new Regex("<a class=\"p-author\" href=\"#\">(?<value>.*?)</a>");

             result = regex.Match(HtmlSource).Groups["value"].Value;

             return result;
         }

         public string GetLZArticle(string HtmlSource)
         {

             string result = string.Empty;
             string authorName = GetAuthorName(HtmlSource);

             Regex regex = new Regex("<td valign=\"top\" class=\"post_info .*?\" data-username=\"" + authorName + "\".*?>.*?<div class=\"post_body\">(?<value>.*?)</div>.*?</td>", RegexOptions.Singleline | RegexOptions.IgnoreCase);

             for (int i = ; i < regex.Matches(HtmlSource).Count; i++)
             {
                 result += regex.Matches(HtmlSource)[i].Groups["value"].Value;
                 result += "--------------------分隔线--------------------";
             }
             return result.Trim().Replace("<br />","\r\n");
         }

代码都在这里了。