Thread.Sleep() 不冻结 UI

Question

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?

Answer 1

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.

private void someMethod()

to

private async void someMethod()

Now you can use the await operator to perform asynchronous tasks, in your case.

await Task.Delay(milliseconds);

This makes it an asynchronous method and will run asynchronously from your UI thread.

Note that this is only supported in the Microsoft .NET framework 4.5 and higher.

.

Answer 2

您可以使用Dispatcher Timer来计时方法的执行。

Answer 3

You are in the UI thread when you call .Sleep(); .

That's why it's freezing the UI. If you need to do this without freezing the UI you would need to run the code in separate threads.

Answer 4

Run your time consuming tasks on separate thread. Avoid time consuming tasks and Thread.Sleep() on UI thread.

Answer 5

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();
            }
        }

Answer 6

Make an async function. 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");
    });
}