需求：鼠标静止一段时间后，显示浮窗广告。
思路：界面XAML写好一个专门显示浮窗广告的Canvas，先设为不可见Visibility=”Collapsed”，然后用System.Timers.Timer类做计时器，设置该timer每秒钟重复运行一次（检测一次），给计数器自增并判断是否累计达到要显示广告的时间，要显示则修改为Visibility=”Visible”。界面绑定鼠标的移动事件为重置该计数器。广告右上角是关闭按钮，点击按钮修改回Visibility=”Collapsed”即可。
关键代码如下：
前台：
<!-- 浮窗广告：主界面鼠标静止一段时间后，显示该广告 --><Canvas x:Name="adCanvas" Width="400" Height="200" Visibility="Collapsed"> <!-- 关闭按钮 --> <Button Command="{Binding CloseAdCanvasCommand}" Canvas.Right="0" Canvas.Top="0"> <Image Source="/HomeDecorationPSD;component/PResentation/Resources/Images/tool_button4.png" /> </Button></Canvas>控制层关键代码
// 静止多少秒显示广告，写在了配置文件里float adIntervalTime = float.Parse(ConfigurationManager.AppSettings["AD_WINDOW_INTERVAL_TIME"]);#region 一段时间鼠标静止，浮窗广告// 主界面鼠标移动事件。一段时间鼠标不移动，则浮窗广告private void MouseMoveCommand(){ adStopTime = 0; // 重置计时器}// 开始浮窗广告的计时private void StartAdWindowTimer(){ Timer timer = new Timer(); timer.Elapsed += new ElapsedEventHandler(TimerTick); timer.Interval = 1000; // 每1秒重复检测一次 timer.Enabled = true;}// 计算是否要显示浮窗广告private void TimerTick(object sender, EventArgs e){ adStopTime++; if (adStopTime >= adIntervalTime && allowADShow) { adCanvasChangeVisibility(true); allowADShow = false; }}// 改变浮窗广告Canvas的显隐private void adCanvasChangeVisibility(bool visible){ App.Current.Dispatcher.Invoke((Action)delegate // <--- HERE { if (visible) adCanvas.Visibility = Visibility.Visible; else adCanvas.Visibility = Visibility.Collapsed; });}// 初始化浮窗广告private void InitAdCanvas(){ adCanvas = shellWindow.adCanvas; adCanvasChangeVisibility(false); // 背景是广告图片 ImageBrush brush = new ImageBrush(); brush.ImageSource = new BitmapImage(new Uri("pack://application:,,,/HomeDecorationPSD;component/Presentation/Resources/Images/logo.jpg")); adCanvas.Background = brush;}// 关闭浮窗广告private void CloseAdCanvasCommand(){ adCanvasChangeVisibility(false); allowADShow = true;}#endregion资料参考MSDN中System.Timers.Timer类的使用：
https://msdn.microsoft.com/query/dev14.query?appId=Dev14IDEF1&l=EN-US&k=k(System.Timers.Timer);k(TargetFrameworkMoniker-.NETFramework,Version%3Dv4.5);k(DevLang-csharp)&rd=true新闻热点
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