private Hashtable hash;//储存代理ip

         private WebProxy currentdaili;

         private int dailiExecMaxCount; //每个代理执行最大次数

         private int currentDailiExecCount; //当前代理执行次数

         public Handler2() //构造函数

         {

             dailiExecMaxCount = ;

             currentDailiExecCount = ;

             //hash = GetDailiList();

             currentdaili = GetOneDaili();

         }

         //http://www.xici.net.co

         /// <summary>

         /// 获取代理ip返回hashtable

         /// KK 2015-04-22

         /// </summary>

         /// <returns></returns>

         private Hashtable GetDailiList()

         {

             Hashtable result = new Hashtable();

             string strUrl = string.Format("http://www.xici.net.co");

             string detailContext = GetHtmlByUrl(strUrl);

             if (!string.IsNullOrEmpty(detailContext))

             {

                 HtmlAgilityPack.HtmlDocument doc = new HtmlAgilityPack.HtmlDocument();

                 string strkeyvalue = string.Empty;

                 try

                 {

                     doc.LoadHtml(detailContext);

                     HtmlNode node = doc.DocumentNode;

                     HtmlNodeCollection trlist = node.SelectNodes("//table[@id='ip_list']//tr[@class='odd' or @class='']");

                     foreach (HtmlNode item in trlist)

                     {

                         if (item.SelectNodes("td")[].InnerText.ToUpper() == "HTTP")

                         {

                             strkeyvalue = item.SelectNodes("td")[].InnerText + ":" + item.SelectNodes("td")[].InnerText;

                             result.Add(strkeyvalue, strkeyvalue);

                         }

                     }

                 }

                 catch (Exception ex)

                 {

                     webframework.common.logclass.Debug("======取代理ip出错====GetDaili==" + ex.Message);

                     result = null;

                 }

             }

             else

             {

                 result = null;

             }

             return result;

         }

         /// <summary>

         /// 从hashtable代理中取任意ip代理

         /// </summary>

         /// <param name="hash"></param>

         /// <returns></returns>

         private WebProxy GetOneDaili()

         {

             try

             {

                 if (hash == null || hash.Count == )

                     hash = GetDailiList();

                 if (currentdaili != null && hash.Contains(currentdaili.Address.Authority + ":" + currentdaili.Address.Port))

                 {

                     hash.Remove(currentdaili.Address.Authority + ":" + currentdaili.Address.Port);

                 }

                 System.Collections.IDictionaryEnumerator enumerator = hash.GetEnumerator();

                 //随机取代理

                 Random rd = new Random();

                 int n = rd.Next(hash.Count);

                 int intCount = ;

                 while (enumerator.MoveNext())

                 {

                     intCount++;

                     if (intCount == n)

                     {

                         currentdaili = new WebProxy(enumerator.Key.ToString(), true);

                         break;

                     }

                 }

             }

             catch (Exception ex)

             {

                 webframework.common.logclass.Debug("======从hashtable代理中取任意ip代理出错====GetOneDaili==" + ex.Message);

                 currentdaili = null;

             }

             logclass.Debug("======当前代理======" + currentdaili.Address.Authority + ":" + currentdaili.Address.Port );

             return currentdaili;

         }

 /// <summary>

         /// 发送get请求

         /// </summary>

         /// <param name="strUrl"></param>

         /// <param name="isRetry"></param>

         /// <returns></returns>

         private string GetHtmlByUrl(string strUrl, bool isRetry = false, WebProxy daili = null)

         {

             currentDailiExecCount++;

             if (currentDailiExecCount > dailiExecMaxCount)

             {

                 logclass.Debug("======当前代理======" + currentdaili.Address.Authority + ":" + currentdaili.Address.Port + "==跑的次数超过了设置的最大次数（" + dailiExecMaxCount.ToString()+"）");

             }

             try

             {

                 HttpWebResponse response = new webframework.common.HttpHelper()

                 {

                     URL = string.Format("{0}", strUrl),

                     //Proxy = daili == null ? currentdaili : daili,

                     //Proxy = new WebProxy("218.204.140.97:8118", true),

                     Proxy = daili == null ? (currentDailiExecCount > dailiExecMaxCount ? GetOneDaili() : currentdaili) : daili,

                     Timeout =  * ,

                 }.CreateGetHttpResponse();

                 return response.HttpString(Encoding.UTF8);

             }

             catch (Exception)

             {

                 //重试请求

                 if (!isRetry)

                     return GetHtmlByUrl(strUrl, true, GetOneDaili());

                 else

                     throw null;

             }

         }

         /// <summary>

         /// 发送post请求

         /// </summary>

         /// <param name="strUrl"></param>

         /// <param name="isRetry"></param>

         /// <returns></returns>

         private string PostHtmlByUrl(string strUrl, string strPostString, bool isRetry = false, WebProxy daili = null)

         {

             currentDailiExecCount++;

             if (currentDailiExecCount > dailiExecMaxCount)

             {

                 logclass.Debug("======当前代理======" + currentdaili.Address.Authority + ":" + currentdaili.Address.Port + "==跑的次数超过了设置的最大次数（" + dailiExecMaxCount.ToString()+"）");

             }

             try

             {

                 HttpWebResponse response = new HttpHelper()

                 {

                     URL = strUrl,

                     PostString = strPostString,

                     //Proxy = new WebProxy("218.204.140.97:8118", true),

                     Proxy = daili == null ? (currentDailiExecCount>dailiExecMaxCount?GetOneDaili(): currentdaili) : daili,

                     //Proxy = daili == null ? currentdaili : daili,

                     PostEncoding = Encoding.UTF8,

                     Timeout =  * ,

                 }.CreatePostHttpResponse();

                 return response.HttpString(Encoding.UTF8);

             }

             catch (Exception)

             {

                 //重试请求

                 if (!isRetry)

                     return PostHtmlByUrl(strUrl, strPostString, true, GetOneDaili());

                 else

                     throw null;

             }

         }