1：XAML
<Style targettype="local:PIEChart"> <Setter Property="Foreground" Value="#FF767676" /> <Setter Property="Palette"> <Setter.Value> <local:PaletteCollection> <Style targettype="Path"> <Setter Property="Fill" Value="#FF25a0db" /> <Setter Property="stroke" Value="#FFFFFF" /> </Style> <Style targettype="Path"> <Setter Property="Fill" Value="#FF9cd60f" /> <Setter Property="stroke" Value="#FFFFFF" /> </Style> <Style targettype="Path"> <Setter Property="Fill" Value="#FFeb7a2a" /> <Setter Property="stroke" Value="#FFFFFF" /> </Style> <Style targettype="Path"> <Setter Property="Fill" Value="#FFd4df32" /> <Setter Property="stroke" Value="#FFFFFF" /> </Style> <Style targettype="Path"> <Setter Property="Fill" Value="#FFcc0000" /> <Setter Property="stroke" Value="#FFFFFF" /> </Style> <Style targettype="Path"> <Setter Property="Fill" Value="#FFE8BC34" /> <Setter Property="stroke" Value="#FFFFFF" /> </Style> <Style targettype="Path"> <Setter Property="Fill" Value="#FF00ABA9" /> <Setter Property="stroke" Value="#FFFFFF" /> </Style> <Style targettype="Path"> <Setter Property="Fill" Value="#FF339933" /> <Setter Property="stroke" Value="#FFFFFF" /> </Style> </local:PaletteCollection> </Setter.Value> </Setter> <Setter Property="Template"> <Setter.Value> <ControlTemplate targettype="local:PIEChart"> <GrID> <GrID.ColumnDeFinitions> <ColumnDeFinition WIDth="*" /> <ColumnDeFinition WIDth="auto" /> </GrID.ColumnDeFinitions> <GrID x:name="gChart" GrID.Column="0"> </GrID> <GrID x:name="gLegend" GrID.Column="1" WIDth="{TemplateBinding LegenDWIDth}" > <ScrollVIEwer margin="20,0" borderThickness="0" HorizontalScrollbarVisibility="Disabled" VerticalScrollbarVisibility="auto"> <StackPanel x:name="spLegend" OrIEntation="Vertical" /> </ScrollVIEwer> </GrID> </GrID> </ControlTemplate> </Setter.Value> </Setter> </Style> 2：C#后台
/// <summary> /// 饼状图控件 /// 参数说明： /// Label:类型标签，传值的类型标签，如Dictionary的Key； /// Value:值，如Dictionary的Value； /// ShowLabel：是否显示饼图标签； /// ShowLegend：是否显示图例； /// Palette：饼图的颜色板，可以用PaletteCollection类添加，默认颜色有8种； /// LegenDWIDth：图例的宽度； /// ItemsSource：饼图的数据源； /// /// author：hzw /// time：2013/08/20 /// </summary> [TemplatePart(name = "gLegend",Type = typeof(GrID))] [TemplatePart(name = "gChart",Type = typeof(GrID))] [TemplatePart(name = "spLegend",Type = typeof(StackPanel))] public class PIEChart : Control { /// <summary> /// 类型标签 /// </summary> public string Label { get; set; } /// <summary> /// 值 /// </summary> public string Value { get; set; } FxChart c = new FxChart("",null,""); /// <summary> /// 构造函数 /// </summary> public PIEChart() { this.DefaultStyleKey = typeof(PIEChart); SizeChanged += new SizeChangedEventHandler(PIEChart_SizeChanged); } /// <summary> /// 尺寸变化事件 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> voID PIEChart_SizeChanged(object sender,SizeChangedEventArgs e) { if (ItemsSource != null) { BindData(); } } public overrIDe voID OnApplyTemplate() { base.OnApplyTemplate(); if (ItemsSource != null) { BindData(); } } #region 依赖性属性设置 public static Readonly DependencyProperty ShowLabelProperty = DependencyProperty.Register("ShowLabel",typeof(bool),typeof(PIEChart),new PropertyMetadata(false,new PropertyChangedCallback(OnShowLabelPropertyChanged))); /// <summary> /// 显示标签 /// </summary> /// <param name="d"></param> /// <param name="e"></param> private static voID OnShowLabelPropertyChanged(DependencyObject d,DependencyPropertyChangedEventArgs e) { PIEChart obj = (PIEChart)d; obj.BindData(); } public bool ShowLabel { get { return (bool)GetValue(ShowLabelProperty); } set { SetValue(ShowLabelProperty,value); this.BindData(); } } public static Readonly DependencyProperty ShowLegendProperty = DependencyProperty.Register("ShowLegend",new PropertyChangedCallback(OnShowLegendPropertyChanged))); /// <summary> /// 是否显示图例 /// </summary> /// <param name="d"></param> /// <param name="e"></param> private static voID OnShowLegendPropertyChanged(DependencyObject d,DependencyPropertyChangedEventArgs e) { PIEChart obj = (PIEChart)d; obj.BindData(); } public bool ShowLegend { get { return (bool)GetValue(ShowLegendProperty); } set { SetValue(ShowLegendProperty,value); this.BindData(); } } public static Readonly DependencyProperty PaletteProperty = DependencyProperty.Register("Palette",typeof(PaletteCollection),new PropertyMetadata(new PaletteCollection())); /// <summary> /// 调色板 /// </summary> public PaletteCollection Palette { get { return (PaletteCollection)GetValue(PaletteProperty); } set { SetValue(PaletteProperty,value); } } public static Readonly DependencyProperty LegenDWIDthProperty = DependencyProperty.Register("LegenDWIDth",typeof(double),new PropertyMetadata((double)80,new PropertyChangedCallback(OnLegenDWIDthPropertyChanged))); /// <summary> /// 图例宽度 /// </summary> /// <param name="d"></param> /// <param name="e"></param> private static voID OnLegenDWIDthPropertyChanged(DependencyObject d,DependencyPropertyChangedEventArgs e) { PIEChart obj = (PIEChart)d; obj.BindData(); } public double LegenDWIDth { get { return (double)GetValue(LegenDWIDthProperty); } set { SetValue(LegenDWIDthProperty,value); } } public static Readonly DependencyProperty ItemsSourceProperty = DependencyProperty.Register("ItemsSource",typeof(IEnumerable),new PropertyMetadata(null,new PropertyChangedCallback(OnItemsSourcePropertyChanged))); /// <summary> /// 数据源 /// </summary> /// <param name="d"></param> /// <param name="e"></param> private static voID OnItemsSourcePropertyChanged(DependencyObject d,DependencyPropertyChangedEventArgs e) { PIEChart obj = (PIEChart)d; obj.BindData(); } public IEnumerable ItemsSource { get { return (IEnumerable)GetValue(ItemsSourceProperty); } set { SetValue(ItemsSourceProperty,value); BindData(); } } #endregion const double ChartSpace = 100; const double LabelSpace = 1; List<Path> _List = new List<Path>(); #region 绑定数据源 /// <summary> /// 绑定数据 /// </summary> private voID BindData() { string labelPath = this.Label; string valuePath = this.Value; if (this.ActualWIDth == double.NaN || this.ActualWIDth == 0) return; GrID gLegend = (GrID)this.GetTemplateChild("gLegend"); GrID gChart = (GrID)this.GetTemplateChild("gChart"); StackPanel spLegend = (StackPanel)this.GetTemplateChild("spLegend"); if (gLegend == null || gChart == null || spLegend == null) return; gChart.Children.Clear(); spLegend.Children.Clear(); _List.Clear(); gLegend.Visibility = ShowLegend ? Visibility.Visible : Visibility.Collapsed; double chartSpace = ChartSpace; //饼图位置 double chartWIDth = this.ActualWIDth - (ShowLegend ? LegenDWIDth : 0); Point centerPoint = new Point(chartWIDth / 2,this.ActualHeight / 2); if (chartWIDth > this.ActualHeight) chartWIDth = this.ActualHeight; if (ShowLabel && chartWIDth > chartSpace) chartWIDth = chartWIDth - chartSpace; //初始角度 double startAngle = 0; //初始点 Point startPoint = new Point(centerPoint.X,centerPoint.Y - (chartWIDth / 2)); if (ItemsSource != null && !string.IsNullOrEmpty(labelPath) && !string.IsNullOrEmpty(valuePath)) { //取总数 double sum = 0; foreach (object obj in ItemsSource) { PropertyInfo piLabel = obj.GetType().GetProperty(labelPath); PropertyInfo piValue = obj.GetType().GetProperty(valuePath); if (piLabel == null) throw new Exception("标签错误!"); if (piValue == null) throw new Exception("值错误!"); object v = piValue.GetValue(obj,null); if (v != null) { sum += double.Parse(v.ToString()); } } int paletteIndex = 0; Brush fill = new SolIDcolorBrush(color.FromArgb(0xFF,0xBA,0xBA)); //Brush stroke = new SolIDcolorBrush(colors.White); Style style = new Style(); style.Setters.Add(new Setter { Property = Path.FillProperty,Value = new SolIDcolorBrush(color.FromArgb(0xFF,0xBA)) }); style.Setters.Add(new Setter { Property = Path.strokeProperty,Value = new SolIDcolorBrush(colors.White) }); foreach (object obj in ItemsSource) { //获取调色板 if (Palette != null && Palette.Count > 0) { style = Palette[paletteIndex]; foreach (Setter setter in style.Setters) { if (setter.Property == Path.FillProperty) fill = (Brush)setter.Value; //if (setter.Property == Path.strokeProperty) // stroke = (Brush)setter.Value; } paletteIndex++; if (paletteIndex >= Palette.Count) paletteIndex = 0; } PropertyInfo piLabel = obj.GetType().GetProperty(Label); PropertyInfo piValue = obj.GetType().GetProperty(Value); string label = piLabel.GetValue(obj,null).ToString(); double value = double.Parse(piValue.GetValue(obj,null).ToString()); //插入图例 GrID grIDLegendItem = new GrID { margin = new Thickness(0,2,0) }; grIDLegendItem.ColumnDeFinitions.Add(new ColumnDeFinition { WIDth = new GrIDLength(20) }); grIDLegendItem.ColumnDeFinitions.Add(new ColumnDeFinition()); Rectangle rectLengendItem = new Rectangle { Fill = fill,WIDth = 12,Height = 12,VerticalAlignment = VerticalAlignment.top,margin = new Thickness(0,0) }; TextBlock tbLengendItem = new TextBlock { textwrapPing = textwrapPing.Wrap }; //设置图例说明 tbLengendItem.Text = label; GrID.SetColumn(tbLengendItem,1); grIDLegendItem.Children.Add(rectLengendItem); grIDLegendItem.Children.Add(tbLengendItem); spLegend.Children.Add(grIDLegendItem); //当前角度 double cAngle = value * 360 / sum + startAngle; Point curPoint = startPoint; //计算坐标 curPoint.X = centerPoint.X + (chartWIDth / 2) * Math.Cos((cAngle - 90) * Math.PI / 180); curPoint.Y = centerPoint.Y + (chartWIDth / 2) * Math.Sin((cAngle - 90) * Math.PI / 180); //插入块 Path path = new Path(); path.Style = style; //path.Fill = fill; //path.stroke = stroke; path.strokeThickness = 1; Pathfigure pathfigure = new Pathfigure { IsClosed = true }; pathfigure.StartPoint = centerPoint; linesegment line = new linesegment(); line.Point = startPoint; pathfigure.Segments.Add(line); //饼图的圆弧 ArcSegment arc = new ArcSegment(); arc.Size = new Size(chartWIDth / 2,chartWIDth / 2); arc.Point = curPoint; arc.SweepDirection = SweepDirection.Clockwise; pathfigure.Segments.Add(arc); PathGeometry pathGeometry = new PathGeometry(); pathGeometry.figures.Add(pathfigure); path.Data = pathGeometry; gChart.Children.Add(path); _List.Add(path); path.Tag = obj; //饼图标识显示 if (ShowLabel) { //计算中间角度 double mAngle = value * 180 / sum + startAngle; //计算Label坐标 double lX = centerPoint.X + (chartWIDth / 2) * Math.Cos((mAngle - 90) * Math.PI / 180); double lY = centerPoint.Y + (chartWIDth / 2) * Math.Sin((mAngle - 90) * Math.PI / 180); //饼图注记显示 TextBlock tbLabel = new TextBlock { textwrapPing = textwrapPing.Wrap,TextAlignment = TextAlignment.Center }; //tbLabel.Text = label + "\r\n" + (string.IsNullOrEmpty(this.ValueFormat) ? value.ToString() : value.ToString(this.ValueFormat)); //设置为只显示值 //tbLabel.Text = value.ToString(); //设置为显示名称和值 tbLabel.Text = label + "\r\n" + string.Format("{0:#%}",value / sum); if (mAngle <= 90) { tbLabel.HorizontalAlignment = HorizontalAlignment.left; tbLabel.VerticalAlignment = VerticalAlignment.Bottom; tbLabel.margin = new Thickness(lX + LabelSpace,this.ActualHeight - lY + LabelSpace); } else { if (mAngle <= 180) { tbLabel.HorizontalAlignment = HorizontalAlignment.left; tbLabel.VerticalAlignment = VerticalAlignment.top; tbLabel.margin = new Thickness(lX + LabelSpace,lY + LabelSpace,0); } else { if (mAngle <= 270) { tbLabel.HorizontalAlignment = HorizontalAlignment.Right; tbLabel.VerticalAlignment = VerticalAlignment.top; tbLabel.margin = new Thickness(0,this.ActualWIDth - (ShowLegend ? LegenDWIDth : 0) - lX + LabelSpace,0); } else { tbLabel.HorizontalAlignment = HorizontalAlignment.Right; tbLabel.VerticalAlignment = VerticalAlignment.Bottom; tbLabel.margin = new Thickness(0,this.ActualHeight - lY + LabelSpace); } } } gChart.Children.Add(tbLabel); } startPoint = curPoint; startAngle = cAngle; } } } #endregion } 总结 以上是内存溢出为你收集整理的Silverlight自定义饼图全部内容，希望文章能够帮你解决Silverlight自定义饼图所遇到的程序开发问题。
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