1 定时器

第一页
<Window x:Class="_6._13.MainWindow"
http://schemas.microsoft.com/winfx/2006/xaml/presentation"
http://schemas.microsoft.com/winfx/2006/xaml"
        Title="定时器" Height="600" Width="825">
    <Grid>
        <Label Name="TimeLabel" Width=" 200" Height=" 80" Background="#0f0ffccc" Foreground="Black"  VerticalContentAlignment="Center" HorizontalContentAlignment="Center"  FontSize ="16 " Content=" 2021-6-13 15:34:00" />
        <Label Name="CountLabel" Width=" 200" Height=" 80" Background="#0f0ffccc" Foreground="Black" VerticalAlignment="Top"  VerticalContentAlignment="Center" HorizontalContentAlignment="Center"  FontSize ="16 " Content=" 1" />
        <Button Width=" 120" Height=" 60" HorizontalAlignment="Left" VerticalAlignment="Top"  Content="开始" Click="Start_Click"/>
        <Button Width=" 120" Height=" 60" HorizontalAlignment="Left"    Content="暂停" Click="Stop_Click" Margin="0,171,0,330" />
        <Button Width=" 120" Height=" 60" HorizontalAlignment="Left"   Content="计数" Click="Count_Click" Margin="0,329,0,172" />
        <Button Width=" 120" Height=" 60" HorizontalAlignment="Left"   Content="重置" Click="Reset_Click" Margin="0,501,0,0" />
        <TextBox  Name="RecordTextBox" Width=" 300" Height=" 400"  HorizontalAlignment="Right" />
    </Grid>
</Window>

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.Windows.Threading;

namespace _6._13
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        DispatcherTimer _timer;
        int _cnt;
        public MainWindow()
        {
            InitializeComponent();
            TimeLabel.Content = DateTime.Now.ToString();
            _timer = new DispatcherTimer();
            _timer.Interval = new TimeSpan(0, 0, 0, 0, 50);
            _timer.Tick += new EventHandler(Timer_Tick);
            _cnt = 0;
        }
        private void Timer_Tick(object sender, EventArgs e)
        {
            _cnt++;
            TimeLabel.Content = DateTime.Now.ToString();
            CountLabel.Content = _cnt.ToString();
        }
        private void Start_Click(object sender, RoutedEventArgs e)
        {
            _timer.Start();
        }

        private void Stop_Click(object sender, RoutedEventArgs e)
        {
            _timer.Stop();
        }

        private void Count_Click(object sender, RoutedEventArgs e)
        {
            RecordTextBox.Text += string.Format("{0},{1}\n", _cnt, TimeLabel.Content);
        }

        private void Reset_Click(object sender, RoutedEventArgs e)
        {
            _timer.Stop();
            _cnt = 0;
            CountLabel.Content = _cnt.ToString();
            RecordTextBox.Text = string.Format("");

        }
    }
}