在不暂停UI的情况下休眠

Question

我写了这个简单的程序等待2秒然后更新文本框:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace WpfApplication1
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, RoutedEventArgs e)
        {
            for (int i = 0; i < 10; i++)
            {
                doSomething(i);
            }
        }
        public void doSomething(int i)
        {
            System.Threading.Thread.Sleep(2000);
            textBox1.Text += "this is the " + i + "th line\n";
        }
    }
}

但是当我运行它时,UI会暂停,我无法对UI做任何事情.它不是动态的,所有必须在textbox1上显示的文本都会在运行结束时显示.

是否有任何替代System.Threading.Thread.Sleep？

Answer 1

您可以使用async/await而不阻止UI线程.

for (int i = 0; i < 10; i++)
{
    await doSomething(i);
}

public async Task doSomething(int i)
{
    await Task.Delay(2000);
    this.Text += "this is the " + i + "th line\n";
}