Using async to sleep in a thread without freezing [closed]

问题

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.

Closed 6 years ago.

So I a label here (""). When the button (button1) is clicked, the label text turns into "Test". After 2 seconds, the text is set back into "". I made this work with a timer (which has an interval of 2000):

private void button1_Click(object sender, EventArgs e)
{
    label1.Text = "Test";
    timer.Enabled = true;
}

private void timer_Tick(object sender, EventArgs e)
{
    label1.Text = "";
}

This works; however though, I am curious about making it work in an async method.

My code looks like this currently:

private void button1_Click(object sender, EventArgs e)
{
    label1.Text = "Test";
    MyAsyncMethod();
}

public async Task MyAsyncMethod()
{
    await Task.Delay(2000);
    label1.Text = "";
}

This doesn't work though.

回答1:

As I mentioned your code worked fine for me, But perhaps try setting your handler to async and running the Task.Delay in there.

private async void Button_Click_1(object sender, RoutedEventArgs e)
{
    label1.Text = "Test";
    await Task.Delay(2000);
    label1.Text = "";
}

来源：https://stackoverflow.com/questions/16878434/using-async-to-sleep-in-a-thread-without-freezing