Show current time WPF

Question

The only way to show current time updating regularly I found is to use timer. Of course, I can implement INotifyPropertyChanged and some special property to be

Answer 1

Here is a little code sample that works without a timer:

public DateTime CurrentTime
{
    get => DateTime.Now;
}

public CurrentViewModelTime(object sender, RoutedEventArgs e)
{
    _ = Update(); // calling an async function we do not want to await
}

private async Task Update()
{
    while (true)
    {
        await Task.Delay(100);
        OnPropertyChanged(nameof(CurrentTime)));
    }
}

Of course, this Update() function never returns, but it does its loop on a threadpool thread and does not even block any thread for long.

You can perfectly also implement this in the window directly without a viewmodel.