How to update the Label`e with a certain frequency?

[Mystic]

How did Label`e update the text with a certain frequency(1 sec, e.g.) test the code:

     for (; ; )
        {
            Task.Delay(1000);
            countDownLabel.Content =
                String.Format(/*подстановка обновляемого текста*/);
        }

but the window is hanging. How do we solve the problem?

[Anderson]

Visnet, because you're not expecting a disk: a method. Task.Delay He returns the control immediately, and you're putting the UI into a refill. The correct one is:

for (; ; )
{
    await Task.Delay(1000);
    countDownLabel.Content = String.Format(/*подстановка обновляемого текста*/);
}

Maybe you'll want to be able to stop updating:

private async Task UpdateLabel(CancellationToken cancellationToken)
{
    while (!cancellationToken.IsCancellationRequested)
    {
        await Task.Delay(1000);
        countDownLabel.Content = String.Format(/*подстановка обновляемого текста*/);
    }
}
private void Do()

{

// обновляем лейбл в течение 10 секунд

var tokenSource = new CancellationTokenSource(TimeSpan.FromSeconds(10));

UpdateLabel(tokenSource.Token);

}

---

If you're not very familiar with async/await, you can use it. https://msdn.microsoft.com/ru-ru/library/system.threading.timer(v=vs.110).aspx ♪ Don't forget. https://msdn.microsoft.com/ru-ru/library/zyzhdc6b(v=vs.110).aspx to access the interface.

timer = new Timer(UpdateLabel, null, 1000, 1000);

...

private void UpdateLabel()

{

if (countDownLabel.InvokeRequired)

{

countDownLabel.Invoke(UpdateLabel);

}

else

{

countDownLabel.Content = String.Format(/подстановка обновляемого текста/);

}

}

...

timer.Dispose();