C# wait 1 second

Question

Is there such a function like sleep(seconds) but it wouldn't block UI updates? I have a code like this and if I put threading sleep after (letters.Children[Words[index].index] as TextBlock).Text = Words[index].LetterCorrect; (I want to sleep after that) it just waits 1 sec and then UI gets updates, but I dont want that.

private void Grid_Click(object sender, RoutedEventArgs e)
{
    if (index == Words.Count() - 1) return;
    if ((((e.Source as Button).Content as Viewbox).Child as Label).Content.ToString() == Words[index].LetterCorrect)
    {
        (letters.Children[Words[index].index] as TextBlock).Text = Words[index].LetterCorrect;

        letters.Children.Clear();
        LoadWord(++index);
        this.DataContext = Words[index];
    }
}

You would need to send a different thread to sleep and not the UI thread. — Andrew, Jul 26 '11 at 18:21

score 7 · Accepted Answer · answered Jul 26 '11 at 18:20

7

Try a Timer and have the Elapsed callback execute the code you want to happen after the one second.

answered Jul 26 '11 at 18:20

Ryan Bennett

3,404
19
32

Yeah, I ended up using this one. Thanks! – Jul 27 '11 at 16:47

yas4891 · Answer 2 · 2011-07-26T18:27:10.323

5

Create a working thread that does the work for you and let that thread sleep for the desired time before going to work

e.g.

ThreadPool.QueueUserWorkItem((state) =>
            {
                Thread.Sleep(1000);

                // do your work here
                // CAUTION: use Invoke where necessary
            });

edited Jul 26 '11 at 18:27

answered Jul 26 '11 at 18:20

yas4891

4,774
3
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55

score 1 · Answer 3 · answered Jul 26 '11 at 18:21

1

Put the logic itself in a background thread separate from the UI thread and have that thread wait.

Anything in the UI thread that waits 1 second will lock up the entire UI thread for that second.

answered Jul 26 '11 at 18:21

Stephen Kiningham

484
5
17

Jonathan Holland · Answer 4 · 2011-07-26T18:27:20.037

1

Use an async scheduled callback:

private void Grid_Click(object sender, RoutedEventArgs e)
{
    if (index == Words.Count() - 1) return;
    if ((((e.Source as Button).Content as Viewbox).Child as Label).Content.ToString() == Words[index].LetterCorrect)
    {
        (letters.Children[Words[index].index] as TextBlock).Text = Words[index].LetterCorrect;

        Scheduler.ThreadPool.Schedule(schedule =>
        {
           letters.Children.Clear();
           LoadWord(++index);
           this.DataContext = Words[index];

        }, TimeSpan.FromSeconds(1));
    }
}

edited Jul 26 '11 at 18:27

answered Jul 26 '11 at 18:21

Jonathan Holland

1,243
11
17

What namespace does it use? System.Reactive.Concurrency? – Jul 26 '11 at 18:51
Hm, but there isn't anything like that in autocomplete.. Do I need to add reference or something? – Jul 26 '11 at 19:33
You probably need System.Reactive – Jonathan Holland Jul 26 '11 at 19:52

score 0 · Answer 5 · answered Jul 26 '11 at 18:21

0

Not sure what framework you are using, but if you are using Silverlight or WPF, have you considered playing an animation that reveals the correct letter or does a fade sequence that takes 1000ms?

answered Jul 26 '11 at 18:21

Bobby D

2,129
14
21

Yes, it's WPF. Interesting idea, btw, Thanks! – Jul 26 '11 at 18:24

C# wait 1 second

5 Answers5