WPF中Timer与DispatcherTimer类的区别

前几天在WPF中写了一个轨迹回放的功能，我想稍微做过类似项目的,都晓得采用一个时间控件或者时间对象作为调度器，我在这么做的时候，出现了问题,于是将程序中的Timer换成了DispatchTimer，然后就可以了，特意在网上找了下这两者的区别，看到一篇比较详细的，并且有代码的博文，我就直接引用了，原文地址：http://www.cnblogs.com/zhchbin/archive/2012/03/06/2381693.html，我只附加上原文的代码。

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;
using System.Timers;

namespace TimerTest
{
    /// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
    public partial class MainWindow : Window
    {
        private Timer aTimer = null;
        public MainWindow()
        {
            InitializeComponent();

            aTimer = new Timer();
            aTimer.Elapsed += new ElapsedEventHandler(OnTimedEvent);
            // Set the Interval to 5 seconds.
            aTimer.Interval = 1000;
            aTimer.Enabled = true;
            aTimer.Start();
        }

        private void OnTimedEvent(object source, ElapsedEventArgs e)
        {
            timeLabel.Content = DateTime.Now.ToUniversalTime();
        }
    }
}

using System;
using System.Windows;
using System.Timers;
using System.Windows.Threading;

namespace TimerTest
{
    /// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
    public partial class MainWindow : Window
    {
        private Timer aTimer = null;

        private delegate void TimerDispatcherDelegate();

        public MainWindow()
        {
            InitializeComponent();

            aTimer = new Timer(1000);
            aTimer.Elapsed += new ElapsedEventHandler(OnTimedEvent);
            aTimer.Interval = 1000;
            aTimer.Enabled = true;
        }

        private void OnTimedEvent(object sender, EventArgs e)
        {
            this.Dispatcher.Invoke(DispatcherPriority.Normal,
                new TimerDispatcherDelegate(updateUI));
        }

        private void updateUI()
        {
            timeLabel.Content = DateTime.Now.ToUniversalTime();
        }
    }
}

通过这些，我想到，其实多线程访问UI的都是相通的，在Winform中为了更新UI,我们都会有带有Invoke或者委托来实现,而Timer要用来更新,主要看这个Timer是否多线程的。