小编Kek*_*Kek的帖子

关于这段代码:

static async Task<string> testc()
{
    Console.WriteLine("helo async " + Thread.CurrentThread.ManagedThreadId); 
    await Task.Run(() => { 
        Thread.Sleep(1000);
        Console.WriteLine("task " + Thread.CurrentThread.ManagedThreadId); 
    });
    Console.WriteLine("callback "+Thread.CurrentThread.ManagedThreadId);
    return "bob";
}

static void Main(string[] args)
{
    Console.WriteLine("helo sync " + Thread.CurrentThread.ManagedThreadId);
    testc();
    Console.WriteLine("over" + Thread.CurrentThread.ManagedThreadId);
    Thread.Sleep(2000);
    Console.ReadLine();
}

我得到以下输出:

helo sync 10
helo async 10
over10
task 11
callback **11**

哪个是好的:await之后的代码片段与任务本身在同一个线程中执行.

现在,如果我在WPF应用程序中执行此操作:

private void Button_Click_1(object sender, RoutedEventArgs e)
{
    Console.WriteLine("helo sync " + Thread.CurrentThread.ManagedThreadId);
    testc();
    Console.WriteLine("over" + Thread.CurrentThread.ManagedThreadId);
    Thread.Sleep(2000);
    Console.ReadLine();
}

它生成以下输出:

helo sync 8 …