Question

我想在C＃

中延迟2秒后执行一个函数

我尝试了以下代码

IAsyncResult result;
Action action = () =>
{
    //I want to call my function here after 1 second delay
    Console.WriteLine("Delayed logging");
};

result = action.BeginInvoke(null, null);
if (result.AsyncWaitHandle.WaitOne(500000))
    Console.WriteLine("Completed");
else
    Console.WriteLine("done");

但它似乎不起作用

以下是fiddle

我只想在向用户显示一些警告消息后导航到另一个页面

Answer 1

除非你实际上要做的事情还要多得多，否则弄乱IAsyncResult，Action和BeginInvoke对于你想要完成的事情来说是一个巨大的过度杀伤力。您所需要做的就是：

Thread.Sleep(1000);
// call your funcction

Answer 2

如前所述，您可以使用System.Threading.Thread.Sleep方法来延迟通话：

public static void Main()
{

    IAsyncResult result;
    Stopwatch sw = new Stopwatch();
    sw.Start();
    Action action = () =>
    {
        Thread.Sleep(1000);
        //I want to call my function here after 1 second delay
        Console.WriteLine("Delayed logging");
    };

    result = action.BeginInvoke(null, null);
    if (result.AsyncWaitHandle.WaitOne(500000))
        Console.WriteLine("Completed");
    else
        Console.WriteLine("done");

    sw.Stop();
    Console.WriteLine(sw.ElapsedMilliseconds.ToString());
}

输出：

延迟记录
  完成
  1000

使用AsyncWaitHandle.WaitOne在C＃中执行一行之前添加延迟

2 个答案: