WPF 使用定時器

WPF 使用定時器：

<ProgressBar Height="10" HorizontalAlignment="Left" Margin="288,0,0,189" Name="progressBar1"

VerticalAlignment="Bottom" Width="100" />

背景：

 private void button1_Click(object sender, RoutedEventArgs e)

        {

            Window_Loaded2();

        }

        private void Window_Loaded2()

            DispatcherTimer _mainTimer = new DispatcherTimer();

            _mainTimer.Interval = TimeSpan.FromSeconds(1);

            _mainTimer.Tick += new EventHandler(_mainTimer_Tick);

            _mainTimer.IsEnabled = true;

            //Timer tmr = new Timer();

            //tmr.Interval = 100;

            //tmr.Enabled = true;

            //tmr.Tick += new EventHandler(tmr_Tick);

        void _mainTimer_Tick(object sender, EventArgs e)

            if (progressBar1.Value == progressBar1.Maximum)

                progressBar1.Value = 0;

            progressBar1.Value++;

private void tmr_Tick(object sender, EventArgs e)

            if (progressBar1.Value == progressBar1.Maximum) progressBar1.Value = 0;