static void funccallback(IAsyncResult ar)
{
TakesAwhileDelegate d = ar.AsyncState as TakesAwhileDelegate;
int result = d.EndInvoke(ar);
Console.WriteLine("result: {0}", result);
}
static void TestCallback()
{
TakesAwhileDelegate d = TakesAWhile;
IAsyncResult ar = d.BeginInvoke(1, 3000, funccallback, d);
//若在委托结束之前不等待委托完成其任务就结束主线程，委托线程就会停止。
for (int i = 0; i < 20; i++)
{
Console.Write(".");
Thread.Sleep(100);
}
}
static void TestIsCompleted()
{
TakesAwhileDelegate d = TakesAWhile;
IAsyncResult ar = d.BeginInvoke(1, 3000, null, null);
while (!ar.IsCompleted)//若在委托结束之前不等待委托完成其任务就结束主线程，委托线程就会停止。
{
Console.Write(".");
Thread.Sleep(100);
}
int result = d.EndInvoke(ar);
Console.WriteLine("result: {0}", result);
}
static void TakesAwhileCompleted(IAsyncResult ar)
{
if (ar == null)
{
throw new ArgumentNullException("ar");
}
TakesAwhileDelegate dl = ar.AsyncState as TakesAwhileDelegate;
Trace.Assert(dl != null, "Invoke object type");
int result = dl.EndInvoke(ar);
Console.WriteLine("result: {0}", result);
}
public void Test1()
{
Console.WriteLine(string.Format("Step1: {0}, Test1 thread ID = {1}",
DateTime.Now,
Thread.CurrentThread.ManagedThreadId));
TakesAwhileDelegate d1 = TakesAWhile;
var ar = d1.BeginInvoke(1, 3000, null, null);
ar.AsyncWaitHandle.WaitOne();
var result = d1.EndInvoke(ar);
Console.WriteLine(string.Format("Step5: {0}, Result = {1}", DateTime.Now, result));
}
static void TestWaitOne()
{
TakesAwhileDelegate d = TakesAWhile;
IAsyncResult ar = d.BeginInvoke(1, 3000, null, null);
//若在委托结束之前不等待委托完成其任务就结束主线程，委托线程就会停止。
while (true)
{
Console.Write(".");
if (ar.AsyncWaitHandle.WaitOne(100, false))
{
Console.WriteLine("Can get the result now");
break;
}
Thread.Sleep(100);
}
int result = d.EndInvoke(ar);
Console.WriteLine("result: {0}", result);
}
public Form1()
{
InitializeComponent();
// 异步委托2 Lambda [1/29/2019 yongchao]
TakesAwhileDelegate dl = TakesAwhile;
dl.BeginInvoke(1, 5000,
ar =>
{
int result = dl.EndInvoke(ar);
Console.WriteLine("result: {0}", result);
},
null);
for (int i = 0; i < 100; i++)
{
Console.Write("*");
Thread.Sleep(200);
}
;
}