Reputation: 197

Thread.Sleep() without freezing the UI

First off, I am a beginner in C# and I would like to make this:

class2.method_79(null, RoomItem_0, num, num2, 0, false, true, true);
System.Threading.Thread.Sleep(250);
class2.method_79(null, RoomItem_0, num, num4, 0, false, true, true);
System.Threading.Thread.Sleep(300);
class2.method_79(null, RoomItem_0, num, num6, 0, false, true, true);

But this solution freezes the UI, how could I make the second event occur 250ms after the first etc without freezing the UI?

Upvotes: 13

Answers (6)

TobyAdd

Reputation: 21

Put the function in a Task.Factory.StartNew and, after that, use Thread.Sleep().

Example:

private void btnExample_Click(object sender, EventArgs e)
{
    System.Threading.Tasks.Task.Factory.StartNew(() =>
    {
        System.Threading.Thread.Sleep(2000);
        MessageBox.Show("First message after one second without freezing");
        System.Threading.Thread.Sleep(2000);
        MessageBox.Show("Second message after one second without freezing");
        System.Threading.Thread.Sleep(2000);
        MessageBox.Show("Third message after one second without freezing");
    });
}

Testing video

Upvotes: 1

Kelin

Reputation: 359

Try this code

public static void wait(int milliseconds)
        {
            System.Windows.Forms.Timer timer1 = new System.Windows.Forms.Timer();
            if (milliseconds == 0 || milliseconds < 0) return;
            timer1.Interval = milliseconds;
            timer1.Enabled = true;
            timer1.Start();
            timer1.Tick += (s, e) =>
            {
                timer1.Enabled = false;
                timer1.Stop();
            };
            while (timer1.Enabled)
            {
                Application.DoEvents();
            }
        }

Upvotes: 1

Stella

Reputation: 548

The simplest way to use sleep without freezing the UI thread is to make your method asynchronous. To make your method asynchronous add the async modifier.