实际上,我很难理解BeginInvoke()和EndInvoke()对。C#异步操作
class AsynchronousDemo
{
public delegate void DemoDelegate();
static void Main()
{
DemoDelegate d = PrintA;
IAsyncResult AResult = d.BeginInvoke(Callback,null);
d.EndInvoke(AResult);
Console.ReadKey(true);
}
static void PrintA()
{
Console.WriteLine("....Method in Print A Running ....");
Thread.Sleep(4000);
Console.WriteLine("....Method in Print A Completed...");
}
static void Callback(IAsyncResult ar)
{
Console.WriteLine("I will be finished after method A
completes its execution");
}
}
1)我们用 “的EndInvoke()” 来表示的BeginInvoke的结束 “异步操作”()..?
2)这些对的真正用途是什么?
3)我可以得到一些简单而好的例子来更好地理解它吗?
优秀explanation.would是非常有用的像我这样的初学者。 – user215675 2009-11-23 16:14:39