性能优化之——.NET(C#)调用webService获取客户端IP地址所属区域(异步回调)（二）

             1
            namespace
             main

             2
            {

             3
            class
             Program

             4
                {

             5
            public
            static
            string Result = string.Empty;
 6 7staticvoid Main(string[] args)
 8        {
 910             Stopwatch sw = Stopwatch.StartNew();
1112string strIP = "111.13.55.3";//请求的IP地址1314             Console.WriteLine("===== AsyncInvoke 异步回调开始 =====");
1516             GetCityIpHandler handler = new GetCityIpHandler(GetIp);
1718////其核心在于IAsyncResult接口的实现19             IAsyncResult res = handler.BeginInvoke(strIP, new AsyncCallback(GetIpSyn), string.Format("===== 主线程耗时{0}毫秒! =====", sw.ElapsedMilliseconds));
2021             Console.WriteLine("===== 继续执行其他的事情... =====");
2223             Console.WriteLine("===== AsyncInvoke 异步回调完毕！=====");
2425            sw.Stop();
2627            Console.ReadLine();
2829        }
30publicdelegatestring GetCityIpHandler(string strIp);
31///<summary>32/// 同步方法
33///</summary>34///<param name="strIP"></param>35///<returns></returns>36publicstaticstring GetIp(string strIp)
37        {
38             IpAddressSearchWebServiceSoapClient ws = new IpAddressSearchWebServiceSoapClient();
39             Stopwatch sw = Stopwatch.StartNew();
40string[] strArea_IP = ws.getCountryCityByIp(strIp);
41            sw.Stop();//这里我们进行漫长的调用
42return Result = string.Format("IP归属地为{0},查询耗时为{1}毫秒.", strArea_IP[1], sw.ElapsedMilliseconds);
43        }
44///<summary>45/// 异步回调方法
46///</summary>47///<param name="result"></param>48staticvoid GetIpSyn(IAsyncResult result)
49        {
50             GetCityIpHandler hl = (GetCityIpHandler)((AsyncResult)result).AsyncDelegate;//AsyncResult 继承自IAsyncResult接口51             Result = hl.EndInvoke(result);
52             Console.WriteLine(Result); //打印调用GetIp返回的数据53object obj = result.AsyncState;
54             Console.WriteLine(obj);//打印返回结果：用户定义的对象，它限定或包含关于异步操作的信息。55        }
56    }
57 }