csharp:正则表达式采集网页数据

 /// <summary>
        /// 
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void StatsoneForm_Load(object sender, EventArgs e)
        {
            string s = @"<tr height=‘19‘ style=‘height:14.25pt;mso-height-source:userset;mso-height-alt:285;‘>    <td class=‘xl67‘ height=‘19‘ style=‘height:14.25pt;‘></td>    <td class=‘xl71‘ x:num>110000</td>    <td class=‘xl71‘ x:str>北京市</td>    <td class=‘xl67‘></td>    <td class=‘xl70‘></td>    <td class=‘xl70‘></td>    <td class=‘xl70‘></td>    <td colspan=‘3‘ style=‘mso-ignore:colspan;‘></td>   </tr>";
            string f = ExtensionPost(s);
            MessageBox.Show(f);
            string sb = @"<p class=‘msonormal‘ style=‘line-height: 150%‘><span lang=‘en-us‘ style=‘line-height: 150%; font-family: ‘times new roman‘, ‘serif‘; font-size: 12pt‘>110000<span>  </span></span><span style=‘line-height: 150%; font-family: 宋体; font-size: 12pt‘>北京市</span></p>";
            string fb = ExtensionPostb(sb);
            MessageBox.Show(fb);

            string strhtml = @"<p class=‘msonormal‘ style=‘line-height: 150%‘><span lang=‘en-us‘ style=‘line-height: 150%; font-family: ‘times new roman‘, ‘serif‘; font-size: 12pt‘>110000<span>  </span></span><span style=‘line-height: 150%; font-family: 宋体; font-size: 12pt‘>北京市</span></p><p class=‘msonormal‘ style=‘line-height: 150%‘><span lang=‘en-us‘ style=‘line-height: 150%; font-family: ‘times new roman‘, ‘serif‘; font-size: 12pt‘>110100<span>  </span></span><span style=‘line-height: 150%; font-family: 宋体; font-size: 12pt‘>市辖区</span></p><p class=‘msonormal‘ style=‘line-height: 150%‘><span lang=‘en-us‘ style=‘line-height: 150%; font-family: ‘times new roman‘, ‘serif‘; font-size: 12pt‘>110101<span>  </span></span><span style=‘line-height: 150%; font-family: 宋体; font-size: 12pt‘>东城区</span></p><p class=‘msonormal‘ style=‘line-height: 150%‘><span lang=‘en-us‘ style=‘line-height: 150%; font-family: ‘times new roman‘, ‘serif‘; font-size: 12pt‘>110102<span>  </span></span><span style=‘line-height: 150%; font-family: 宋体; font-size: 12pt‘>西城区</span></p><p class=‘msonormal‘ style=‘line-height: 150%‘><span lang=‘en-us‘ style=‘line-height: 150%; font-family: ‘times new roman‘, ‘serif‘; font-size: 12pt‘>110105<span>  </span></span><span style=‘line-height: 150%; font-family: 宋体; font-size: 12pt‘>朝阳区</span></p><p class=‘msonormal‘ style=‘line-height: 150%‘><span lang=‘en-us‘ style=‘line-height: 150%; font-family: ‘times new roman‘, ‘serif‘; font-size: 12pt‘>110106<span>  </span></span><span style=‘line-height: 150%; font-family: 宋体; font-size: 12pt‘>丰台区</span></p>";
            IEnumerable<AreaHtmlValue> htmlValue = GetRegValue(@"<p class=‘msonormal‘ style=‘line-height: 150%‘><span lang=‘en-us‘ style=‘line-height: 150%; font-family: ‘times new roman‘, ‘serif‘; font-size: 12pt‘>(?<code>\d+)<span>  </span></span><span style=‘line-height: 150%; font-family: 宋体; font-size: 12pt‘>(?<name>\w*)</span></p>", strhtml);
            List<AreaInfo> areaList = (from v in htmlValue
                                      // let name = v.Name.Replace("自治区直辖县级行政区划", "县").Replace("市辖区", "市").Replace("省直辖县级行政区划", "县")
                                      // .Replace("县", "")
                                       select new AreaInfo
                                       {
                                           AreaCode = v.Code.Substring(0, 5),
                                           AreaName = v.Name,
                                           AreaFullName = v.Name,
                                           ParentAreaCode = "0",
                                           ParentId = 0,
                                           CreateTime = DateTime.Now,
                                           AreaYear = 2015
                                       }).ToList();


            this.dataGridView1.DataSource = areaList;

        }
        /// <summary>
        /// <tr height=‘19‘ style=‘height:14.25pt;mso-height-source:userset;mso-height-alt:285;‘>
        /// <td class=‘xl67‘ height=‘19‘ style=‘height:14.25pt;‘></td>
        /// <td class=‘xl71‘ x:num>654326</td>
        ///<td class=‘xl71‘ x:str><span style=‘mso-spacerun:yes;‘>    </span><font class=‘font3‘>吉木乃县</font></td>
        ///<td class=‘xl67‘></td>
        ///<td class=‘xl70‘></td>
        ///<td class=‘xl70‘></td>
        ///<td class=‘xl70‘></td>
        ///<td colspan=‘3‘ style=‘mso-ignore:colspan;‘></td>
        ///</tr>
        /// </summary>
        /// <param name="url"></param>
        /// <returns></returns>
        static String ExtensionPost(String url)
        {

            //<tr height=‘19‘ style=‘height:14.25pt;mso-height-source:userset;mso-height-alt:285;‘>    <td class=‘xl67‘ height=‘19‘ style=‘height:14.25pt;‘></td>    <td class=‘xl71‘ x:num>110000</td>    <td class=‘xl71‘ x:str>北京市</td>    <td class=‘xl67‘></td>    <td class=‘xl70‘></td>    <td class=‘xl70‘></td>    <td class=‘xl70‘></td>    <td colspan=‘3‘ style=‘mso-ignore:colspan;‘></td>   </tr>
            //<p class=‘msonormal‘ style=‘line-height: 150%‘><span lang=‘en-us‘ style=‘line-height: 150%; font-family: ‘times new roman‘, ‘serif‘; font-size: 12pt‘>110000<span>  </span></span><span style=‘line-height: 150%; font-family: 宋体; font-size: 12pt‘>　北京市</span></p>

            //<tr height=‘19‘ style=‘height:14.25pt;mso-height-source:userset;mso-height-alt:285;‘><td class=‘xl67‘ height=‘19‘ style=‘height:14.25pt;‘></td><td class=‘xl71‘ x:num>654326</td><td class=‘xl71‘ x:str><span style=‘mso-spacerun:yes;‘>    </span><font class=‘font3‘>吉木乃县</font></td><td class=‘xl67‘></td><td class=‘xl70‘></td><td class=‘xl70‘></td><td class=‘xl70‘></td><td colspan=‘3‘ style=‘mso-ignore:colspan;‘></td></tr>
           // Regex r = new Regex(@"<tr height=‘19‘ style=‘height:14.25pt;mso-height-source:userset;mso-height-alt:285;‘><td class=‘xl67‘ height=‘19‘ style=‘height:14.25pt;‘></td><td class=‘xl71‘ x:num>(?<port>\d+)</td><td class=‘xl71‘ x:str><span style=‘mso-spacerun:yes;‘>    </span><font class=‘font3‘>(?<proto>\w+)</font></td><td class=‘xl67‘></td><td class=‘xl70‘></td><td class=‘xl70‘></td><td class=‘xl70‘></td><td colspan=‘3‘ style=‘mso-ignore:colspan;‘></td></tr>",
            Regex r = new Regex(@"<tr height=‘19‘ style=‘height:14.25pt;mso-height-source:userset;mso-height-alt:285;‘>    <td class=‘xl67‘ height=‘19‘ style=‘height:14.25pt;‘></td>    <td class=‘xl71‘ x:num>(?<port>\d+)</td>    <td class=‘xl71‘ x:str>(?<proto>\w+)</td>    <td class=‘xl67‘></td>    <td class=‘xl70‘></td>    <td class=‘xl70‘></td>    <td class=‘xl70‘></td>    <td colspan=‘3‘ style=‘mso-ignore:colspan;‘></td>   </tr>",
            RegexOptions.Compiled);
            return r.Match(url).Result("${proto}${port}");
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="url"></param>
        /// <returns></returns>
        static string ExtensionPostb(string url)
        {
            Regex r = new Regex(@"<p class=‘msonormal‘ style=‘line-height: 150%‘><span lang=‘en-us‘ style=‘line-height: 150%; font-family: ‘times new roman‘, ‘serif‘; font-size: 12pt‘>(?<port>\d+)<span>  </span></span><span style=‘line-height: 150%; font-family: 宋体; font-size: 12pt‘>(?<proto>\w*)</span></p>",
            RegexOptions.Compiled);
            return r.Match(url).Result("${proto}${port}");
        }


        /// <summary>
        /// http://files2.mca.gov.cn/www/201512/20151224151630189.htm
        /// <tr height="19" style=‘height:14.25pt;mso-height-source:userset;mso-height-alt:285;‘><td class="xl67" height="19" style=‘height:14.25pt;‘></td><td class="xl71" x:num>110000</td><td class="xl71" x:str>北京市</td><td class="xl67"></td><td class="xl70"></td><td class="xl70"></td><td class="xl70"></td><td colspan="3" style=‘mso-ignore:colspan;‘></td></tr>
        /// http://www.stats.gov.cn/tjsj/tjbz/xzqhdm/201504/t20150415_712722.html
        /// <p class="MsoNormal" style="line-height: 150%"><span lang="EN-US" style="line-height: 150%; font-family: ‘Times New Roman‘, ‘serif‘; font-size: 12pt">110000<span>  </span></span><span style="line-height: 150%; font-family: 宋体; font-size: 12pt">　北京市</span></p>
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button1_Click(object sender, EventArgs e)
        {
            try
            {
                //1
                string url = "http://www.stats.gov.cn/tjsj/tjbz/xzqhdm/201504/t20150415_712722.html";
                //2
                //string url = "http://files2.mca.gov.cn/www/201512/20151224151630189.htm";
                // 获取相关HTML块
                //IEnumerable<AreaHtmlValue> htmlValue =GetRegValue(@"<tr class=‘villagetr‘><td>(?<code>\d{12})</td><td>(?<type>\d{3})</td><td>(?<name>\w*)</td></tr>",GetHtml(url));
                //<p class=‘msonormal‘ style=‘line-height: 150%‘><span lang=‘en-us‘ style=‘line-height: 150%; font-family: ‘times new roman‘, ‘serif‘; font-size: 12pt‘>110000<span>  </span></span><span style=‘line-height: 150%; font-family: 宋体; font-size: 12pt‘>　北京市</span></p>
                //1
                IEnumerable<AreaHtmlValue> htmlValue = GetRegValue(@"<p class=‘msonormal‘ style=‘line-height: 150%‘><span lang=‘en-us‘ style=‘line-height: 150%; font-family: ‘times new roman‘, ‘serif‘; font-size: 12pt‘>(?<code>\d+)<span>  </span></span><span style=‘line-height: 150%; font-family: 宋体; font-size: 12pt‘>(?<name>\w*)</span></p>", GetHtml(url));
                //2
                //IEnumerable<AreaHtmlValue> htmlValue = GetRegValue(@"<tr height=‘19‘ style=‘height:14.25pt;mso-height-source:userset;mso-height-alt:285;‘><td class=‘xl67‘ height=‘19‘ style=‘height:14.25pt;‘></td><td class=‘xl71‘ x:num>(?<code>\d+)</td><td class=‘xl71‘ x:str><span style=‘mso-spacerun:yes;‘>    </span><font class=‘font3‘>(?<name>\w*)</font></td><td class=‘xl67‘></td><td class=‘xl70‘></td><td class=‘xl70‘></td><td class=‘xl70‘></td><td colspan=‘3‘ style=‘mso-ignore:colspan;‘></td></tr>", GetHtml(url));
                //this.richTextBox1.Text = GetHtml(url);
               // this.textBox1.Text = GetHtml(url);
               // this.textBox1.SelectAll();
                List<AreaInfo> areaList = (from v in htmlValue
                                           //let name = v.Name.Replace("自治区直辖县级行政区划", "县").Replace("市辖区", "市").Replace("省直辖县级行政区划", "县")
                                                  //.Replace("县", "")
                                             select new AreaInfo
                                              {
                                                  AreaCode = v.Code.Substring(0, 6),
                                                  AreaName = v.Name,
                                                  AreaFullName = v.Name,
                                                  ParentAreaCode = "0",
                                        
                                                  ParentId = 0,
                                                  CreateTime = DateTime.Now,
                                                  AreaYear = 2015
                                              }).ToList();

               
                this.dataGridView2.DataSource = areaList;

                WebClient wc = new WebClient();
               string mainData = Encoding.UTF8.GetString(wc.DownloadData(string.Format("http://www.stats.gov.cn/tjsj/tjbz/xzqhdm/201504/t20150415_712722.html")));
               this.richTextBox2.Text =RemoveScript(RemoveStyle(ReplaceEnter(mainData)));
              // this.textBox2.Text = RemoveScript(RemoveStyle(ReplaceEnter(mainData)));
              // this.textBox2.SelectAll();

            }
            catch (Exception ex)
            {
                ex.Message.ToString();
            }

        }
        #region 网页源码

        /// <summary>
        /// 
        /// </summary>
        /// <param name="url"></param>
        private static void updowndimg(string url)
        {
            WebClient client = new WebClient();
            string html = client.DownloadString(url);
            MatchCollection matches = Regex.Matches(html, "<img\\s*.*src=\"(.+?)\".*/>");
            for (int i = 0; i < matches.Count; i++)
            {
                string img = matches[i].Groups[1].Value.Replace("\"", string.Empty);
                img = "url/" + img;
                client.DownloadFile(img, @"c:\g\" + Path.GetFileName(img));
                Console.WriteLine(img);
            }
            Console.ReadKey();
        }
        /// <summary>
        /// 例如，Find_po在字开头处查找以"po"开头的字符串：
        /// </summary>
        static void Find_po()
        {
            string text = @" I can not find my position in Beijing ";
            string pattern = @"\bpo\S*ion\b";
            MatchCollection matches = Regex.Matches(text, pattern, RegexOptions.IgnoreCase
           | RegexOptions.IgnorePatternWhitespace | RegexOptions.ExplicitCapture);
            WriteMatches(text, matches);
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="text"></param>
        /// <param name="matches"></param>
        static void WriteMatches(string text, MatchCollection matches)
        {
            Console.WriteLine("Original text was: \n\n" + text + "\n");
            Console.WriteLine("No. of matches: " + matches.Count);
            foreach (Match nextMatch in matches)
            {
                int Index = nextMatch.Index;
                string result = nextMatch.ToString();
                int charsBefore = (Index < 5) ? Index : 5;
                int fromEnd = text.Length - Index - result.Length;
                int charsAfter = (fromEnd < 5) ? fromEnd : 5;
                int charsToDisplay = charsBefore + charsAfter + result.Length;
                Console.WriteLine("Index: {0}, \tString: {1}, \t{2}", Index, result,
                text.Substring(Index - charsBefore, charsToDisplay));
            }
        }
        /// <summary>
        /// 如，"http://www.yahoo.com.cn:8080/index.html"将返回"http:8080"。
        /// </summary>
        /// <param name="url"></param>
        /// <returns></returns>
        String Extension(String url)
        {
            Regex r = new Regex(@"^(?<proto>\w+)://[^/]+?(?<port>:\d+)?/",
            RegexOptions.Compiled);
            return r.Match(url).Result("${proto}${port}");
        }
        /// <summary>
        ///     获取远程网页源码
        /// </summary>
        /// <param name="url"></param>
        /// <returns></returns>
        private static string GetHtml(string url)
        {
            try
            {
                WebRequest webRequest = WebRequest.Create(url);
                WebResponse webResponse = webRequest.GetResponse();
                Stream reader = webResponse.GetResponseStream();

                if (reader != null)
                {
                    var respStreamReader = new StreamReader(reader, Encoding.UTF8); //

                    var cbuffer = new char[1024];

                    int byteRead = respStreamReader.Read(cbuffer, 0, 256);

                    string strBuff = string.Empty;

                    while (byteRead != 0)
                    {
                        var strResp = new string(cbuffer, 0, byteRead);

                        strBuff = strBuff + strResp;

                        byteRead = respStreamReader.Read(cbuffer, 0, 256);
                    }

                    strBuff = RemoveScript(RemoveStyle(ReplaceEnter(strBuff)));

                    return strBuff;
                }
            }
            catch (Exception)
            {
                AreaLogHelper.WriteLogFile("【异常URL】" + url);
                Console.WriteLine("【异常URL】" + url);
            }

            return string.Empty;
        }

        /// <summary>
        ///     替换网页中的换行和引号
        /// </summary>
        /// <param name="htmlCode">HTML源代码</param>
        /// <returns></returns>
        private static string ReplaceEnter(string htmlCode)
        {
            if (string.IsNullOrEmpty(htmlCode))
                return string.Empty;
            return htmlCode.Replace("\r\n", "").Replace("\"", "‘").Replace("\n", "").Replace("\r", "").Replace("　　　", "").Replace("　　", "").Replace("    ", "").Replace("   ", "").Replace("　", "").ToLower();//.Replace("\"", "").Replace(" ", "")
        }

           #region private methods 
            private static string RemoveComment(string input) 
            { 
                string result = input; 
                //remove comment 
                result = Regex.Replace(result, @"<!--[^-]*-->", string.Empty, RegexOptions.IgnoreCase); 
                return result; 
            } 
            private static string RemoveStyle(string input) 
            { 
                string result = input; 
                //remove all styles 
                result = Regex.Replace(result, @"<style[^>]*?>.*?</style>", string.Empty, RegexOptions.IgnoreCase | RegexOptions.Singleline); 
                return result; 
            }
            private static string RemoveScript(string input) 
            { 
                string result = input; 
                result = Regex.Replace(result, @"<script[^>]*?>.*?</script>", string.Empty, RegexOptions.IgnoreCase | RegexOptions.Singleline); 
                result = Regex.Replace(result, @"<noscript[^>]*?>.*?</noscript>", string.Empty, RegexOptions.IgnoreCase | RegexOptions.Singleline); 
                return result; 
            }
            private static string RemoveTags(string input) 
            { 
                string result = input; 
                result = result.Replace(" ", " "); 
                result = result.Replace("", "\""); 
                result = result.Replace("<", "<"); 
                result = result.Replace(">", ">"); 
                result = result.Replace("&", "&"); 
                result = result.Replace("<br>", "\r\n"); 
                result = Regex.Replace(result, @"<[\s\S]*?>", string.Empty, RegexOptions.IgnoreCase); 
                return result; 
            } 
            #endregion
        /// <summary>
        ///  执行正则提取出值
        /// </summary>
        /// <param name="regexString">正则表达式</param>
        /// <param name="remoteStr">HtmlCode源代码</param>
        /// <returns></returns>
        private static IEnumerable<AreaHtmlValue> GetRegValue(string regexString, string remoteStr)
        {
            var reg = new Regex(regexString, RegexOptions.Compiled);//RegexOptions.Compiled
            MatchCollection mc = reg.Matches(remoteStr);

            return (from Match m in mc
                    select new AreaHtmlValue
                    {
                        Code = m.Groups["code"].Value,
                        Name = m.Groups["name"].Value,
                       // Type = m.Groups["type"].Value
                    }).ToList();
        }

        private class AreaHtmlValue
        {
            public string Code { get; set; }
            public string Name { get; set; }

            public string Type { get; set; }
        }

        #endregion

    }