WPF制作一个简单的倒计时器实例附源码

Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> 1 using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace CountDown
{
/// <summary>
/// 实现倒计时功能的类
/// </summary>
public class ProcessCount
{
private Int32 _TotalSecond;
public Int32 TotalSecond
{
get { return _TotalSecond; }
set { _TotalSecond = value; }
}
/// <summary>
/// 构造函数
/// </summary>
public ProcessCount(Int32 totalSecond)
{
this._TotalSecond = totalSecond;
}
/// <summary>
/// 减秒
/// </summary>
/// <returns></returns>
public bool ProcessCountDown()
{
if (_TotalSecond == 0)
return false;
else
{
_TotalSecond--;
return true;
}
}
/// <summary>
/// 获取小时显示值
/// </summary>
/// <returns></returns>
public string GetHour()
{
return String.Format("{0:D2}", (_TotalSecond / 3600));
}
/// <summary>
/// 获取分钟显示值
/// </summary>
/// <returns></returns>
public string GetMinute()
{
return String.Format("{0:D2}", (_TotalSecond % 3600) / 60);
}
/// <summary>
/// 获取秒显示值
/// </summary>
/// <returns></returns>
public string GetSecond()
{
return String.Format("{0:D2}", _TotalSecond % 60);
}
}
}

Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> 1 <Window x:Class="CountDown.MainWin"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Height="400" Width="800" HorizontalAlignment="Center" VerticalAlignment="Center"
Title=" " Topmost="True" WindowStyle="None" Background="Transparent" AllowsTransparency="True" WindowStartupLocation="CenterScreen">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition />
<ColumnDefinition Width="40"/>
<ColumnDefinition />
<ColumnDefinition Width="40"/>
<ColumnDefinition />
</Grid.ColumnDefinitions>
<TextBlock Text="00" Name="HourArea" VerticalAlignment="Center" FontSize="180" Background="Red" Grid.Column="0"/>
<TextBlock Text=":" Name="HourSplitMinute" VerticalAlignment="Center" FontSize="180" Background="Red" Grid.Column="1"/>
<TextBlock Text="10" Name="MinuteArea" VerticalAlignment="Center" FontSize="180" Background="Red" Grid.Column="2" />
<TextBlock Text=":" Name="MinuteSplitSecond" VerticalAlignment="Center" FontSize="180" Background="Red" Grid.Column="3"/>
<TextBlock Text="00" Name="SecondArea" VerticalAlignment="Center" FontSize="180" Background="Red" Grid.Column="4"/>
</Grid>
</Window>

Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> 1 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.Shapes;
using System.Windows.Threading;
namespace CountDown
{
/// <summary>
/// Interaction logic for MainWin.xaml
/// </summary>
public partial class MainWin : Window
{
private DispatcherTimer timer;
private ProcessCount processCount;
public MainWin()
{
InitializeComponent();
this.Loaded += new RoutedEventHandler(MainWin_Loaded);
}
/// <summary>
/// 窗口加载事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void MainWin_Loaded(object sender, RoutedEventArgs e)
{
//设置定时器
timer = new DispatcherTimer();
timer.Interval = new TimeSpan(10000000); //时间间隔为一秒
timer.Tick += new EventHandler(timer_Tick);
//转换成秒数
Int32 hour= Convert.ToInt32(HourArea.Text);
Int32 minute = Convert.ToInt32(MinuteArea.Text);
Int32 second = Convert.ToInt32(SecondArea.Text);
//处理倒计时的类
processCount = new ProcessCount(hour*3600+minute*60+second);
CountDown += new CountDownHandler(processCount.ProcessCountDown);
//开启定时器
timer.Start();
}
/// <summary>
/// Timer触发的事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void timer_Tick(object sender, EventArgs e)
{
if (OnCountDown())
{
HourArea.Text = processCount.GetHour();
MinuteArea.Text = processCount.GetMinute();
SecondArea.Text = processCount.GetSecond();
}
else
timer.Stop();
}
/// <summary>
/// 处理事件
/// </summary>
public event CountDownHandler CountDown;
public bool OnCountDown()
{
if (CountDown != null)
return CountDown();
return false;
}
}
/// <summary>
/// 处理倒计时的委托
/// </summary>
/// <returns></returns>
public delegate bool CountDownHandler();
}

　　private int countSecond=300; //记录秒数
　　private void UserControl_Loaded(object sender, RoutedEventArgs e)
　　{
　　　　private DispatcherTimer disTimer = new DispatcherTimer();
　　　　disTimer.Interval = new TimeSpan(0, 0, 0, 1); //参数分别为：天，小时，分，秒。此方法有重载，可根据实际情况调用。
　　　　disTimer.Tick += new EventHandler(disTimer_Tick); //每一秒执行的方法
　　　　disTimer.Start();
　　}
　　void disTimer_Tick(object sender, EventArgs e)
　　{
　　　　if(countSecond==0)
　　　　{
　　　　　　MessageBox.Show("结束");
　　　　}
　　　　else
　　　　{
　　　　　　//判断lblSecond是否处于UI线程上
　　　　　　if (lblSecond.Dispatcher.CheckAccess())
　　　　　　{
　　　　　　　　lblSecond.Content=countSecnd.ToString();
　　　　　　}
　　　　　　else
　　　　　　{
　　　　　　　　lblSecond.Dispatcher.BeginInvoke(DispatcherPriority.Normal,(Action)(() =>{
　　　　　　　　　　lblSecond.Content=countSecond.ToString();
　　　　　　　　}));　　
　　　　　　}
　　　　　　countSecond--;
　　　　}
　　}