/// <summary>
    /// 根據(jù)學(xué)生姓名得到該學(xué)生的成績
    /// </summary>
    /// <param name="strName">學(xué)生姓名</param>
    /// <param name="intDelaySecond">延遲的秒數(shù)</param>
    /// <returns>成績</returns>
    [WebMethod]
    public int GetGrade(string strName, int intDelaySecond)
    {
     if (intDelaySecond > )
     {
       Thread.Sleep(intDelaySecond * );
     }
     int intGrade = ;
     switch (strName)
     {
       case "張三":
         intGrade = ;
         break;
       case "李四":
         intGrade = ;
         break;
       case "王五":
         intGrade = ;
         break;
       case "賈六":
         intGrade = ;
         break;
     }
     return intGrade;
   }

AsynCall.AsynCall service = new AsynCall.AsynCall();
     Console.WriteLine("請輸入要查詢成績的學(xué)生的姓名：");
     string strName = Console.ReadLine();
     Console.WriteLine("請輸入要延遲的秒數(shù)：");
     int intSecond = int.Parse(Console.ReadLine());   
     Console.WriteLine("同步調(diào)用開始");
     Console.WriteLine("同步調(diào)用結(jié)果為：" + service.GetGrade(strName, intSecond));
     Console.WriteLine("同步調(diào)用結(jié)束");
 　　  Console.ReadLine();

 Console.WriteLine("異步調(diào)用開始");


 　　  //'+='表示事件的預(yù)定，'new AsynCall.GetGradeCompletedEventHandler(service_Completed)'表示利用編寫的事件處理程序生成一個委托實例，'service.GetGradeCompleted'表示添加什么到產(chǎn)生事件對象的事件列表當中去，合起來解釋就是把這個委托實例添加到產(chǎn)生事件對象的事件列表當中去，這個過程叫做訂閱事件，委托就是代理，我們可以這樣理解，委托就是把一個事件處理函數(shù)和一個事件關(guān)聯(lián)起來
     service.GetGradeCompleted += new AsynCall.GetGradeCompletedEventHandler(service_Completed);
     //開始異步調(diào)用
     service.GetGradeAsync(strName, intSecond);
     Console.WriteLine("當前進程沒有被阻塞");
     for (int i = ; i < ; i++)
     {
       Console.WriteLine(i);
    }
    Console.ReadLine();
 
    private static void service_Completed(object sender, AsynCall.GetGradeCompletedEventArgs e)
    {
       Console.WriteLine("異步調(diào)用結(jié)果為：" + e.Result);
       Console.WriteLine("異步調(diào)用結(jié)束");
    }