1
namespace
Bingosoft.Training2007.CSharp
2
{
3
delegate int Sum(int num1,int num2);
4
/// <summary>
5 /// 使用Delegate的BeginInvoke方法完成一个函数的异步调用过程。
6
/// </summary>
7 class Question6
8 {
9 /// <summary>
10 /// 求两个int型数的和(仅供演示)
11 /// </summary>
12 /// <param name="num1"></param>
13 /// <param name="num2"></param>
14 /// <returns></returns>
15 public static int GetSum(int num1, int num2)
16 {
17 Thread.Sleep(1000);
18 return num1 + num2;
19 }
20
21 /// <summary>
22 /// 用EndInvoke等待异步调用
23 /// </summary>
24 public static void TestAsyn1()
25 {
26 Sum sum = new Sum(GetSum);
27 IAsyncResult result = sum.BeginInvoke(10, 20,null,null);
28 Console.WriteLine("计算中
");
29 int returnVal = sum.EndInvoke(result);
30 Console.WriteLine(returnVal);
31 }
32
33 /// <summary>
34 /// 用WaitHandle等待异步调用
35 /// </summary>
36 public static void TestAsyn2()
37 {
38 Sum sum = new Sum(GetSum);
39 IAsyncResult result = sum.BeginInvoke(10, 20, null, null);
40 result.AsyncWaitHandle.WaitOne();
41 Console.WriteLine("计算完毕：");
42 int returnVal = sum.EndInvoke(result);
43 Console.WriteLine(returnVal);
44 }
45
46 /// <summary>
47 /// 轮训查询等待异步调用
48 /// </summary>
49 public static void TestAsyn3()
50 {
51 Sum sum = new Sum(GetSum);
52 IAsyncResult result = sum.BeginInvoke(10, 20, null, null);
53 while (!result.IsCompleted)
54 {
55 Console.WriteLine("计算中");
56 }
57 int returnVal = sum.EndInvoke(result);
58 Console.WriteLine(returnVal);
59 }
60
61 /// <summary>
62 /// 异步调用完成后，执行回调
63 /// </summary>
64 public static void TestAsyn4()
65 {
66 Sum sum = new Sum(GetSum);
67 IAsyncResult result = sum.BeginInvoke(10, 20, new AsyncCallback(Question6.CallBackAsyn), sum);
68 Console.WriteLine("计算中");
69 }
70
71 /// <summary>
72 /// 回调函数
73 /// </summary>
74 /// <param name="ar"></param>
75 public static void CallBackAsyn(IAsyncResult ar)
76 {
77 Sum sum = (Sum)ar.AsyncState;
78 int returnVal = sum.EndInvoke(ar);
79 MessageBox.Show(returnVal.ToString(), "计算结果:", MessageBoxButtons.OK, MessageBoxIcon.Information);
80 }
81 }
82
}
83
84
85
//
测试Question6
86
Question6.TestAsyn1();
87Question6.TestAsyn2();
88Question6.TestAsyn3();
89Question6.TestAsyn4();
90Console.WriteLine(
"
Press any Key to Continue
"
);
91Console.ReadLine();
92
namespace
Bingosoft.Training2007.CSharp2
{3
delegate int Sum(int num1,int num2);4
/// <summary>5
/// 使用Delegate的BeginInvoke方法完成一个函数的异步调用过程。6
/// </summary>7
class Question68
{9
/// <summary>10
/// 求两个int型数的和(仅供演示)11
/// </summary>12
/// <param name="num1"></param>13
/// <param name="num2"></param>14
/// <returns></returns>15
public static int GetSum(int num1, int num2)16
{17
Thread.Sleep(1000);18
return num1 + num2; 19
} 20
21
/// <summary>22
/// 用EndInvoke等待异步调用23
/// </summary>24
public static void TestAsyn1()25
{26
Sum sum = new Sum(GetSum);27
IAsyncResult result = sum.BeginInvoke(10, 20,null,null);28
Console.WriteLine("计算中");29
int returnVal = sum.EndInvoke(result);30
Console.WriteLine(returnVal);31
} 32
33
/// <summary>34
/// 用WaitHandle等待异步调用35
/// </summary>36
public static void TestAsyn2()37
{38
Sum sum = new Sum(GetSum);39
IAsyncResult result = sum.BeginInvoke(10, 20, null, null);40
result.AsyncWaitHandle.WaitOne();41
Console.WriteLine("计算完毕：");42
int returnVal = sum.EndInvoke(result);43
Console.WriteLine(returnVal);44
} 45
46
/// <summary>47
/// 轮训查询等待异步调用48
/// </summary>49
public static void TestAsyn3()50
{51
Sum sum = new Sum(GetSum);52
IAsyncResult result = sum.BeginInvoke(10, 20, null, null);53
while (!result.IsCompleted)54
{55
Console.WriteLine("计算中");56
}57
int returnVal = sum.EndInvoke(result);58
Console.WriteLine(returnVal);59
} 60
61
/// <summary>62
/// 异步调用完成后，执行回调63
/// </summary>64
public static void TestAsyn4()65
{66
Sum sum = new Sum(GetSum);67
IAsyncResult result = sum.BeginInvoke(10, 20, new AsyncCallback(Question6.CallBackAsyn), sum);68
Console.WriteLine("计算中");69
} 70
71
/// <summary>72
/// 回调函数73
/// </summary>74
/// <param name="ar"></param>75
public static void CallBackAsyn(IAsyncResult ar)76
{77
Sum sum = (Sum)ar.AsyncState;78
int returnVal = sum.EndInvoke(ar);79
MessageBox.Show(returnVal.ToString(), "计算结果:", MessageBoxButtons.OK, MessageBoxIcon.Information);80
}81
}82
}
83
84
85
//
测试Question6
86
Question6.TestAsyn1();87
Question6.TestAsyn2();88
Question6.TestAsyn3();89
Question6.TestAsyn4();90
Console.WriteLine(
"
Press any Key to Continue
"
);91
Console.ReadLine();92
本文转自Silent Void博客园博客，原文链接：http://www.cnblogs.com/happyhippy/archive/2007/07/23/827901.html，如需转载请自行联系原作者
