12-DispatcherTimer控制进度条的显示

using System;using System.Collections.Generic;using System.Linq;using System.Net;using System.Windows;using System.Windows.Controls;using System.Windows.Documents;using System.Windows.Input;using System.Windows.Media;using System.Windows.Media.Animation;using System.Windows.Shapes;using Microsoft.Phone.Controls;using System.Windows.Threading;namespace PhoneApp5{    public partial class MainPage : PhoneApplicationPage      {        //创建一个DispatcherTimer对象        DispatcherTimer dispatcherTimer = new DispatcherTimer();        // 构造函数        public MainPage()        {            InitializeComponent();            //设置进度条的时间的间隔            dispatcherTimer.Interval = new TimeSpan(5000);            //tick事件            dispatcherTimer.Tick += new EventHandler(dispatcherTimer_Tick);        }        void dispatcherTimer_Tick(object sender, EventArgs e)        {            progressBar1.Value += 0.1;        }        private void button1_Click(object sender, RoutedEventArgs e)        {            dispatcherTimer.Start();        }        /**         * 点击关闭计时器的方法         */        private void button2_Click(object sender, RoutedEventArgs e)        {            dispatcherTimer.Stop();        }    }}