WPF绘制仪表

1，效果：

2，代码：

2.1,资源字典：BaseStyle.xaml

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"><!--外轮廓颜色--><SolidColorBrush x:Key="ColorBrush"><SolidColorBrush.Color>#190E1C</SolidColorBrush.Color></SolidColorBrush><!--外轮廓进度颜色--><SolidColorBrush x:Key="ColorBrush1" Color="#2B1A51"></SolidColorBrush><!--中心圆盘颜色--><Color x:Key="ColorLight2" >#23153B</Color><Color x:Key="ColorLight1">#23153B</Color><Color x:Key="ColorLight">#45246B </Color><!--指针颜色--><Color x:Key="LightBlueColor1">#00C9FF</Color ><Color x:Key="LightBlueColor2">#00C9FF</Color><Color x:Key="LightBlueColor3">#00C9F0</Color>
</ResourceDictionary>

2.2,自定义圆弧类Arc

//WPF未提供圆弧Shape，故根据Ellipse实现过程自定义一个圆弧类class Arc : Shape{private Rect _rect = Rect.Empty;public double StartAngle{get { return (double)GetValue(StartAngleProperty); }set { SetValue(StartAngleProperty, value); }}// Using a DependencyProperty as the backing store for StartAngle.  This enables animation, styling, binding, etc...public static readonly DependencyProperty StartAngleProperty =DependencyProperty.Register("StartAngle", typeof(double), typeof(Arc), new FrameworkPropertyMetadata((double)-135, FrameworkPropertyMetadataOptions.AffectsRender));public double EndAngle{get { return (double)GetValue(EndAngleProperty); }set { SetValue(EndAngleProperty, value); }}// Using a DependencyProperty as the backing store for EndAngle.  This enables animation, styling, binding, etc...public static readonly DependencyProperty EndAngleProperty =DependencyProperty.Register("EndAngle", typeof(double), typeof(Arc), new FrameworkPropertyMetadata((double)135, FrameworkPropertyMetadataOptions.AffectsRender));public double ArcThickness{get { return (double)GetValue(ArcThicknessProperty); }set { SetValue(ArcThicknessProperty, value); }}// Using a DependencyProperty as the backing store for ArcThickness.  This enables animation, styling, binding, etc...public static readonly DependencyProperty ArcThicknessProperty =DependencyProperty.Register("ArcThickness", typeof(double), typeof(Arc), new FrameworkPropertyMetadata((double)10, FrameworkPropertyMetadataOptions.AffectsRender));public override Geometry RenderedGeometry => DefiningGeometry;public override Transform GeometryTransform => Transform.Identity;protected override Geometry DefiningGeometry{get{if (_rect.IsEmpty){return Geometry.Empty;}PathGeometry path = new PathGeometry();PathFigure figure = new PathFigure();figure.IsClosed = false;//根据起始角度算出起始点//可绘图的区域为_recdouble offsetAngle = 270;double diameter = _rect.Width > _rect.Height ? _rect.Height : _rect.Width;Point centerPoint = new Point(_rect.X + _rect.Width / 2, _rect.Y + _rect.Height / 2);double xoffset = diameter * Math.Cos((StartAngle + offsetAngle) / 180 * Math.PI) / 2;double yoffset = diameter * Math.Sin((StartAngle + offsetAngle) / 180 * Math.PI) / 2;Point startPoint = new Point(centerPoint.X + xoffset, centerPoint.Y + yoffset);double xoffset2 = diameter * Math.Cos((EndAngle + offsetAngle) / 180 * Math.PI) / 2;double yoffset2 = diameter * Math.Sin((EndAngle + offsetAngle) / 180 * Math.PI) / 2;Point endPoint = new Point(centerPoint.X + xoffset2, centerPoint.Y + yoffset2);figure.StartPoint = startPoint;ArcSegment arc = new ArcSegment{Point = endPoint,Size = new Size(diameter / 2, diameter / 2),SweepDirection = SweepDirection.Clockwise};if (EndAngle - StartAngle < 180){arc.IsLargeArc = false;}else{arc.IsLargeArc = true;}figure.Segments.Add(arc);path.Figures.Add(figure);return path;}}static Arc(){Shape.StretchProperty.OverrideMetadata(typeof(Arc), new FrameworkPropertyMetadata(Stretch.Fill));}protected override Size MeasureOverride(Size constraint){double width = constraint.Width;double height = constraint.Height;if (double.IsInfinity(width) && double.IsInfinity(height)){return GetNaturalSize();}if (base.Stretch == Stretch.UniformToFill){width = ((!double.IsInfinity(width) && !double.IsInfinity(height)) ? Math.Max(width, height) : Math.Min(width, height));return new Size(width, width);}return constraint;}protected override Size ArrangeOverride(Size finalSize){double strokeThickness = ArcThickness;double num = strokeThickness / 2.0;_rect = new Rect(num, num, Math.Max(0.0, finalSize.Width - strokeThickness), Math.Max(0.0, finalSize.Height - strokeThickness));switch (base.Stretch){case Stretch.None:{ref Rect rect = ref _rect;double width = (_rect.Height = 0.0);rect.Width = width;break;}case Stretch.Uniform:if (_rect.Width > _rect.Height){_rect.Width = _rect.Height;}else{_rect.Height = _rect.Width;}break;case Stretch.UniformToFill:if (_rect.Width < _rect.Height){_rect.Width = _rect.Height;}else{_rect.Height = _rect.Width;}break;}return finalSize;// return base.ArrangeOverride(finalSize);}protected override void OnRender(DrawingContext drawingContext){if (!_rect.IsEmpty){Pen pen = new Pen();pen.Brush = Stroke;pen.Thickness = ArcThickness;pen.StartLineCap = StrokeStartLineCap;pen.EndLineCap = StrokeEndLineCap;drawingContext.DrawGeometry(base.Fill, pen, RenderedGeometry);}}Size GetNaturalSize(){double strokeThickness = GetStrokeThickness();return new Size(strokeThickness * 2, strokeThickness * 2);}double GetStrokeThickness(){if (double.IsNaN(ArcThickness) || double.IsInfinity(ArcThickness)){return 0.0;}else{return ArcThickness;}}}

2.3，自定义仪表控件xaml

<UserControl x:Class="MyWpfControlLibrary.MeterPlate"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:local="clr-namespace:MyWpfControlLibrary"mc:Ignorable="d" d:DesignHeight="400" d:DesignWidth="400" x:Name="meterPlate"><UserControl.Resources><ResourceDictionary Source="pack://application:,,,/MyWpfControlLibrary;component/basestyle.xaml"></ResourceDictionary></UserControl.Resources><Viewbox><Grid><Border x:Name="border01" Background="{Binding ElementName=meterPlate, Path=PlateBackground}" CornerRadius="200" BorderThickness="{Binding ElementName=meterPlate, Path=PlateBorderThickness}"  BorderBrush="{Binding ElementName=meterPlate, Path=PlateBorderBrush}" ClipToBounds="True" ><Grid><Canvas Name="canvasPlate" Width="400" Height="400"  Background="Transparent" ></Canvas><local:Arc x:Name="arc01" Opacity="0.3" StrokeStartLineCap="Round" StrokeEndLineCap="Round" StartAngle="{Binding ElementName=meterPlate, Path=StartAngle}" EndAngle="{Binding ElementName=meterPlate, Path=EndAngle}"    Stroke="{DynamicResource ColorBrush}" ArcThickness="{Binding ElementName=meterPlate, Path=ArcThickness}" ></local:Arc><local:Arc  ArcThickness="{Binding ElementName=meterPlate, Path=ArcThickness}" StrokeStartLineCap="Round" StrokeEndLineCap="Round" StartAngle="{Binding ElementName=meterPlate, Path=StartAngle}"  Opacity="0.8"  x:Name="arckd"  EndAngle="110" Stroke="{DynamicResource ColorBrush1}"></local:Arc><Border  Width="200" Height="200" CornerRadius="100" Opacity="0.5" ><Border.Background><RadialGradientBrush RadiusX="1" RadiusY="1"><GradientStop Color="{DynamicResource  ColorLight2}" Offset="0.3"></GradientStop><GradientStop Color="{DynamicResource ColorLight1}" Offset="0.4"></GradientStop><GradientStop Color="{DynamicResource ColorLight}" Offset="1"></GradientStop></RadialGradientBrush></Border.Background></Border><Path  HorizontalAlignment="Center" VerticalAlignment="Center"  Data="M0 -5,160 0,0 5 z" RenderTransformOrigin="0.5,0.5" Margin="14"><Path.Fill><RadialGradientBrush RadiusX="1" RadiusY="1"><GradientStop Color="{DynamicResource LightBlueColor1}" Offset="0.3"/><GradientStop Color="{DynamicResource LightBlueColor2}" Offset="0.4"/><GradientStop Color="{DynamicResource LightBlueColor3}" Offset="1"/></RadialGradientBrush></Path.Fill><Path.RenderTransform><TransformGroup><TranslateTransform X="80"></TranslateTransform><RotateTransform x:Name="rtPointer" /></TransformGroup></Path.RenderTransform></Path><Border Width="100" Height="100" CornerRadius="50"  Margin="14"><Border.Background><RadialGradientBrush RadiusX="1" RadiusY="1"><GradientStop Color="{DynamicResource ColorLight}" Offset="0.5"/><GradientStop Color="{DynamicResource  ColorLight1}" Offset="0.3"/><GradientStop Color="{DynamicResource ColorLight2}" Offset="0.1"/></RadialGradientBrush></Border.Background><StackPanel Panel.ZIndex="999" Orientation="Vertical" VerticalAlignment="Center" HorizontalAlignment="Center"><TextBlock x:Name="txtCurValue" Foreground="White"  Text="{Binding ElementName=meterPlate, Path=Value}" FontSize="30" VerticalAlignment="Center" HorizontalAlignment="Center"/><TextBlock Foreground="White" Text="km/h" FontSize="12" VerticalAlignment="Center" HorizontalAlignment="Center"/></StackPanel></Border></Grid></Border></Grid></Viewbox>
</UserControl>

效果：

2.4，仪表控件代码：

  public partial class MeterPlate : UserControl{const double OffsetAngle = 270;public static readonly DependencyProperty StartAngleProperty;public static readonly DependencyProperty EndAngleProperty;public static readonly DependencyProperty ValueProperty;public static readonly DependencyProperty MinNumProperty;public static readonly DependencyProperty MaxNumProperty;public static readonly DependencyProperty PlateBackgroundProperty;public static readonly DependencyProperty PlateBorderBrushProperty;public static readonly DependencyProperty PlateBorderThicknessProperty;public static readonly DependencyProperty ArcThicknessProperty;public static readonly DependencyProperty LowAlarmPercentProperty;public static readonly DependencyProperty HeightAlarmPercentProperty;public static readonly DependencyProperty LowAlarmColorProperty;public static readonly DependencyProperty HeightAlarmColorProperty;public MeterPlate(){InitializeComponent();}static MeterPlate(){StartAngleProperty =DependencyProperty.Register("StartAngle", typeof(double), typeof(MeterPlate), new FrameworkPropertyMetadata((double)-135, FrameworkPropertyMetadataOptions.AffectsRender));EndAngleProperty =DependencyProperty.Register("EndAngle", typeof(double), typeof(MeterPlate), new FrameworkPropertyMetadata((double)135, FrameworkPropertyMetadataOptions.AffectsRender));ValueProperty =DependencyProperty.Register("Value", typeof(double), typeof(MeterPlate),new FrameworkPropertyMetadata((double)45, FrameworkPropertyMetadataOptions.AffectsRender));MinNumProperty =DependencyProperty.Register("MinNum", typeof(double), typeof(MeterPlate),new FrameworkPropertyMetadata((double)0, FrameworkPropertyMetadataOptions.AffectsRender));MaxNumProperty =DependencyProperty.Register("MaxNum", typeof(double), typeof(MeterPlate),new FrameworkPropertyMetadata((double)120, FrameworkPropertyMetadataOptions.AffectsRender));PlateBackgroundProperty =DependencyProperty.Register("PlateBackground", typeof(Brush), typeof(MeterPlate), new PropertyMetadata(new SolidColorBrush(Color.FromRgb(43, 26, 81))));PlateBorderBrushProperty =DependencyProperty.Register("PlateBorderBrush", typeof(Brush), typeof(MeterPlate), null);PlateBorderThicknessProperty =DependencyProperty.Register("PlateBorderThickness", typeof(Thickness), typeof(MeterPlate), new PropertyMetadata(new Thickness(0)));ArcThicknessProperty =DependencyProperty.Register("ArcThickness", typeof(double), typeof(MeterPlate), new PropertyMetadata((double)30));LowAlarmPercentProperty =DependencyProperty.Register("LowAlarmPercent", typeof(double), typeof(MeterPlate), new FrameworkPropertyMetadata((double)1, FrameworkPropertyMetadataOptions.AffectsRender));HeightAlarmPercentProperty =DependencyProperty.Register(" HeightAlarmPercent", typeof(double), typeof(MeterPlate), new FrameworkPropertyMetadata((double)1, FrameworkPropertyMetadataOptions.AffectsRender));LowAlarmColorProperty =DependencyProperty.Register("LowAlarmColor", typeof(Color), typeof(MeterPlate), new FrameworkPropertyMetadata(Colors.Orange, FrameworkPropertyMetadataOptions.AffectsRender));HeightAlarmColorProperty =DependencyProperty.Register("HeightAlarmColor", typeof(Color), typeof(MeterPlate), new FrameworkPropertyMetadata(Colors.Red, FrameworkPropertyMetadataOptions.AffectsRender));}[Browsable(true), Category("自定义属性"), Description("仪表盘开始角度")]public double StartAngle{get { return (double)GetValue(StartAngleProperty); }set { SetValue(StartAngleProperty, value); }}[Browsable(true), Category("自定义属性"), Description("仪表盘结束角度")]public double EndAngle{get { return (double)GetValue(EndAngleProperty); }set { SetValue(EndAngleProperty, value); }}[Browsable(true), Category("自定义属性"), Description("当前值")]public double Value{get { return (double)GetValue(ValueProperty); }set { SetValue(ValueProperty, value); }}[Browsable(true), Category("自定义属性"), Description("仪表盘最小值")]public double MinNum{get { return (double)GetValue(MinNumProperty); }set { SetValue(MinNumProperty, value); }}[Browsable(true), Category("自定义属性"), Description("仪表盘最大值")]public double MaxNum{get { return (double)GetValue(MaxNumProperty); }set { SetValue(MaxNumProperty, value); }}[Browsable(true), Category("自定义属性"), Description("仪表盘低值区域所占区域默认为1")]public double LowAlarmPercent{get { return (double)GetValue(LowAlarmPercentProperty); }set { SetValue(LowAlarmPercentProperty, value); }}[Browsable(true), Category("自定义属性"), Description("仪表盘高值区域所占区域默认为1")]public double HeightAlarmPercent{get { return (double)GetValue(HeightAlarmPercentProperty); }set { SetValue(HeightAlarmPercentProperty, value); }}[Browsable(true), Category("自定义属性"), Description("仪表盘低值区域刻度值与刻度线颜色")]public Color LowAlarmColor{get { return (Color)GetValue(LowAlarmColorProperty); }set { SetValue(LowAlarmColorProperty, value); }}[Browsable(true), Category("自定义属性"), Description("仪表盘高值区域刻度值与刻度线颜色")]public Color HeightAlarmColor{get { return (Color)GetValue(HeightAlarmColorProperty); }set { SetValue(HeightAlarmColorProperty, value); }}[Browsable(true), Category("自定义属性"), Description("仪表盘背景画刷")]public Brush PlateBackground{get { return (Brush)GetValue(PlateBackgroundProperty); }set { SetValue(PlateBackgroundProperty, value); }}[Browsable(true), Category("自定义属性"), Description("仪表盘边框画刷")]public Brush PlateBorderBrush{get { return (Brush)GetValue(PlateBorderBrushProperty); }set { SetValue(PlateBorderBrushProperty, value); }}[Browsable(true), Category("自定义属性"), Description("仪表盘边框宽度")]public Thickness PlateBorderThickness{get { return (Thickness)GetValue(PlateBorderThicknessProperty); }set { SetValue(PlateBorderThicknessProperty, value); }}[Browsable(true), Category("自定义属性"), Description("仪表盘进度条宽度")]public double ArcThickness{get { return (double)GetValue(ArcThicknessProperty); }set { SetValue(ArcThicknessProperty, value); }}protected override void OnRender(DrawingContext drawingContext){base.OnRender(drawingContext);DrawScale();DrawAngle();}/// <summary>/// 画表盘的刻度/// </summary>private void DrawScale(){double unitAngle = (EndAngle - StartAngle) / (MaxNum - MinNum);double realStartAngle = StartAngle + OffsetAngle;double outgap = arc01.ArcThickness;this.canvasPlate.Children.Clear();Point centerPoint = new Point(200, 200);if (!double.IsInfinity(border01.BorderThickness.Left) && !double.IsNaN(border01.BorderThickness.Left)){centerPoint = new Point(200 - border01.BorderThickness.Left, 200 - border01.BorderThickness.Left);}for (double i = 0; i <= this.MaxNum - this.MinNum; i++){//添加刻度线Line lineScale = new Line();if (LowAlarmPercent != 0 && i <= LowAlarmPercent * 10){lineScale.Stroke = new SolidColorBrush(LowAlarmColor);}else if (HeightAlarmPercent != 0 && i >= (MaxNum - HeightAlarmPercent * 10)){lineScale.Stroke = new SolidColorBrush(HeightAlarmColor);}else{lineScale.Stroke = new SolidColorBrush(Colors.White);if (i % 10 != 0){lineScale.Opacity = 0.6;}}if (i % 10 == 0){//注意Math.Cos和Math.Sin的参数是弧度，记得将角度转为弧度制lineScale.X1 = centerPoint.X + (centerPoint.X - outgap - 20) * Math.Cos((i * unitAngle + realStartAngle) * Math.PI / 180);lineScale.Y1 = centerPoint.Y + (centerPoint.X - outgap - 20) * Math.Sin((i * unitAngle + realStartAngle) * Math.PI / 180);lineScale.StrokeThickness = 2;//添加刻度值TextBlock txtScale = new TextBlock();txtScale.Text = (i + this.MinNum).ToString();txtScale.Width = 34;txtScale.TextAlignment = TextAlignment.Center;if (LowAlarmPercent != 0 && i <= LowAlarmPercent * 10){txtScale.Foreground = new SolidColorBrush(LowAlarmColor);}else if (HeightAlarmPercent != 0 && i >= (MaxNum - HeightAlarmPercent * 10)){txtScale.Foreground = new SolidColorBrush(HeightAlarmColor);}else{txtScale.Foreground = new SolidColorBrush(Colors.White);}txtScale.RenderTransform = new RotateTransform() { Angle = 0, CenterX = 17, CenterY = 8 };txtScale.FontSize = 18;if (i > (MaxNum - MinNum) / 2){Canvas.SetLeft(txtScale, centerPoint.X + (centerPoint.X - outgap - 35) * Math.Cos((i * unitAngle + realStartAngle) * Math.PI / 180) - 20);Canvas.SetTop(txtScale, centerPoint.Y + (centerPoint.X - outgap - 35) * Math.Sin((i * unitAngle + realStartAngle) * Math.PI / 180) - 10);}else{Canvas.SetLeft(txtScale, centerPoint.X + (centerPoint.X - outgap - 35) * Math.Cos((i * unitAngle + realStartAngle) * Math.PI / 180) - 17);Canvas.SetTop(txtScale, centerPoint.Y + (centerPoint.X - outgap - 35) * Math.Sin((i * unitAngle + realStartAngle) * Math.PI / 180) - 10);}this.canvasPlate.Children.Add(txtScale);}else{lineScale.X1 = centerPoint.X + (centerPoint.X - outgap - 10) * Math.Cos((i * unitAngle + realStartAngle) * Math.PI / 180);lineScale.Y1 = centerPoint.Y + (centerPoint.X - outgap - 10) * Math.Sin((i * unitAngle + realStartAngle) * Math.PI / 180);lineScale.StrokeThickness = 1;// lineScale.Opacity = 0.6;}lineScale.X2 = centerPoint.X + (centerPoint.X - outgap) * Math.Cos((i * unitAngle + realStartAngle) * Math.PI / 180);lineScale.Y2 = centerPoint.Y + (centerPoint.X - outgap) * Math.Sin((i * unitAngle + realStartAngle) * Math.PI / 180);this.canvasPlate.Children.Add(lineScale);}if (LowAlarmPercent != 0 && Value <= LowAlarmPercent * 10){txtCurValue.Foreground = new SolidColorBrush(LowAlarmColor);}else if (HeightAlarmPercent != 0 && Value >= (MaxNum - HeightAlarmPercent * 10)){txtCurValue.Foreground = new SolidColorBrush(HeightAlarmColor);}else{txtCurValue.Foreground = new SolidColorBrush(Colors.White);}}private void DrawAngle(){double step = (Value - MinNum) / (this.MaxNum - this.MinNum) * (EndAngle - StartAngle) + OffsetAngle + StartAngle;double desAngle = (Value - MinNum) / (this.MaxNum - this.MinNum) * (EndAngle - StartAngle) + StartAngle;if (Value < MinNum){step = OffsetAngle + StartAngle;desAngle = StartAngle;}if (Value > MaxNum){step = OffsetAngle + EndAngle;desAngle = EndAngle;}DoubleAnimation da = new DoubleAnimation(step, new Duration(TimeSpan.FromMilliseconds(200)));this.rtPointer.BeginAnimation(RotateTransform.AngleProperty, da);//进度条显示DoubleAnimation da2 = new DoubleAnimation(desAngle, new Duration(TimeSpan.FromMilliseconds(200)));this.arckd.BeginAnimation(Arc.EndAngleProperty, da2);}}

3，应用：

<Window x:Class="Demo.MainWindow"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"xmlns:d="http://schemas.microsoft.com/expression/blend/2008"xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"xmlns:local="clr-namespace:Demo"mc:Ignorable="d"xmlns:my="clr-namespace:MyWpfControlLibrary;assembly=MyWpfControlLibrary"Title="MainWindow" Height="450" Width="800"><Grid><Grid.ColumnDefinitions><ColumnDefinition/><ColumnDefinition /></Grid.ColumnDefinitions><Grid.RowDefinitions><RowDefinition Height="300*"/><RowDefinition Height="2*"/></Grid.RowDefinitions><my:MeterPlate StartAngle="-135" PlateBackground="SlateBlue" LowAlarmPercent="2" HeightAlarmPercent="2" MaxNum="120" MinNum="0"  EndAngle="135" Value="{Binding Value}" Margin="0,0,35,10" ></my:MeterPlate><Grid Grid.Column="1" Margin="10"><Grid.RowDefinitions><RowDefinition></RowDefinition><RowDefinition></RowDefinition><RowDefinition></RowDefinition><RowDefinition></RowDefinition></Grid.RowDefinitions><Grid.ColumnDefinitions><ColumnDefinition></ColumnDefinition><ColumnDefinition></ColumnDefinition></Grid.ColumnDefinitions><Button x:Name="btnStart" Margin="10" Content="开始" Click="btnStart_Click"></Button><TextBlock Grid.Row="1" Margin="10" Text="{Binding Value}" FontSize="16" FontWeight="Bold" TextAlignment="Center"></TextBlock></Grid></Grid>
</Window>

效果

测试代码：

  public partial class MainWindow : Window{public double Value{get { return (double)GetValue(ValueProperty); }set { SetValue(ValueProperty, value); }}// Using a DependencyProperty as the backing store for Value.  This enables animation, styling, binding, etc...public static readonly DependencyProperty ValueProperty =DependencyProperty.Register("Value", typeof(double), typeof(MainWindow), new PropertyMetadata((double)0));public MainWindow(){InitializeComponent();this.DataContext = this;}bool isBreak = false;private void btnStart_Click(object sender, RoutedEventArgs e){if (btnStart.Content.ToString().Equals("开始")){isBreak = false;DoWork();}else{isBreak = true;}}Random random = new Random();async void DoWork(){btnStart.Content = "运行中";await Task.Run(() =>{while (true){if (isBreak){break;}Dispatcher.Invoke(() =>{Value+=random.Next(0,20);if (Value >= 120){Value = 0;}});System.Threading.Thread.Sleep(500);}});btnStart.Content = "停止";await Task.Delay(2000);btnStart.Content = "开始";}}