在已使用IProgress更新的WPF窗口上使用秒表和DataBinding

<Window x:Class="YourNamespace.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="450" Width="800">
    <Grid>
        <TextBlock x:Name="TimerTextBlock" FontSize="24" HorizontalAlignment="Center" VerticalAlignment="Center" />
    </Grid>
</Window>

using System;
using System.ComponentModel;
using System.Diagnostics;
using System.Windows;

namespace YourNamespace
{
    public partial class MainWindow : Window, INotifyPropertyChanged
    {
        private Stopwatch stopwatch;
        private string elapsedTime;

        public string ElapsedTime
        {
            get { return elapsedTime; }
            set
            {
                elapsedTime = value;
                OnPropertyChanged("ElapsedTime");
            }
        }

        public MainWindow()
        {
            InitializeComponent();
            DataContext = this;

            stopwatch = new Stopwatch();
            stopwatch.Start();

            CompositionTarget.Rendering += CompositionTarget_Rendering;
        }

        private void CompositionTarget_Rendering(object sender, EventArgs e)
        {
            ElapsedTime = stopwatch.Elapsed.ToString(@"hh\:mm\:ss\.fff");
        }

        public event PropertyChangedEventHandler PropertyChanged;

        protected virtual void OnPropertyChanged(string propertyName)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }
    }
}