在wpf中实现无饥饿的while循环重绘图像

using System;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Media;
using System.Windows.Shapes;
using System.Windows.Threading;

namespace WpfApplication
{
    public partial class MainWindow : Window
    {
        private bool isRunning = false;

        public MainWindow()
        {
            InitializeComponent();
        }

        private async void StartButton_Click(object sender, RoutedEventArgs e)
        {
            if (!isRunning)
            {
                isRunning = true;
                await Task.Run(() => StartLoop());
            }
        }

        private void StopButton_Click(object sender, RoutedEventArgs e)
        {
            isRunning = false;
        }

        private async Task StartLoop()
        {
            while (isRunning)
            {
                await Task.Delay(10); // 添加一个延迟以避免频繁的绘制操作

                // 更新图像的绘制逻辑
                Dispatcher.Invoke(() =>
                {
                    // 清空画布
                    Canvas.Children.Clear();

                    // 绘制一个矩形
                    Rectangle rectangle = new Rectangle
                    {
                        Width = 100,
                        Height = 100,
                        Fill = Brushes.Blue
                    };

                    // 将矩形添加到画布上
                    Canvas.Children.Add(rectangle);
                });
            }
        }
    }
}