WPF实现统计图（饼图仿LiveCharts）

using System.Collections.ObjectModel; using System.Windows; using System.Windows.Controls; using System.Windows.Media; using WpfPieControl.Models;  namespace WpfPieControl {     public class PieControl: Control     {         public ObservableCollection<PieSegmentModel> PieSegmentModels         {             get { return (ObservableCollection<PieSegmentModel>)GetValue(PieSegmentModelsProperty); }             set { SetValue(PieSegmentModelsProperty, value); }         }          public static readonly DependencyProperty PieSegmentModelsProperty =             DependencyProperty.Register("PieSegmentModels", typeof(ObservableCollection<PieSegmentModel>), typeof(PieControl), new UIPropertyMetadata(OnPieSegmentModelChanged));          private static void OnPieSegmentModelChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)         {             PieControl pieControl = d as PieControl;             if (e.NewValue != null)             {                 var array = e.NewValue as ObservableCollection<PieSegmentModel>;                 double angleNum = 0;                 foreach (var item in array)                 {                     var color = new SolidColorBrush((Color)ColorConverter.ConvertFromString(pieControl.ColorArray[array.IndexOf(item)]));                     item.Color = color;                     item.StartAngle = angleNum;                     item.EndAngle = angleNum + item.Value / 100 * 360;                     angleNum = item.EndAngle;                 }             }         }         /// <summary>         /// colors         /// </summary>         private string[] ColorArray = new string[] { "#FDC006", "#607E89", "#2095F2", "#F34336" };           /// <summary>         /// 0~1         /// </summary>         public double ArcThickness         {             get { return (double)GetValue(ArcThicknessProperty); }             set { SetValue(ArcThicknessProperty, value); }         }          public static readonly DependencyProperty ArcThicknessProperty =             DependencyProperty.Register("ArcThickness", typeof(double), typeof(PieControl), new PropertyMetadata(1.0));           static PieControl()         {             DefaultStyleKeyProperty.OverrideMetadata(typeof(PieControl), new FrameworkPropertyMetadata(typeof(PieControl)));         }     } }

<Style TargetType="{x:Type local:PieControl}">             <Setter Property="UseLayoutRounding" Value="True" />             <!--<Setter Property="Background" Value="#252525"/>-->             <Setter Property="Foreground" Value="White"/>             <Setter Property="Width" Value="250"/>             <Setter Property="Height" Value="250"/>             <Setter Property="Template">                 <Setter.Value>                     <ControlTemplate TargetType="{x:Type local:PieControl}">                         <ItemsControl Width="{TemplateBinding Width}" Height="{TemplateBinding Height}"                                        ItemsSource="{TemplateBinding PieSegmentModels}"                                       Background="{TemplateBinding Background}">                             <ItemsControl.ItemsPanel>                                 <ItemsPanelTemplate>                                     <Grid IsItemsHost="True"/>                                 </ItemsPanelTemplate>                             </ItemsControl.ItemsPanel>                             <ItemsControl.ItemTemplate>                                 <DataTemplate>                                     <ed:Arc Width="{TemplateBinding Width}" Height="{TemplateBinding Height}"                                                 ArcThickness="{Binding ArcThickness,RelativeSource={RelativeSource FindAncestor,AncestorType=local:PieControl}}" ArcThicknessUnit="Percent"                                                 EndAngle="{Binding EndAngle}"                                                 StartAngle="{Binding StartAngle}"                                                 Stretch="None"                                                 ToolTip="{Binding Name}"                                                 Stroke="{Binding ColorStroke}"                                                 StrokeThickness="2"                                                 Fill="{Binding Color}">                                     </ed:Arc>                                 </DataTemplate>                             </ItemsControl.ItemTemplate>                         </ItemsControl>                     </ControlTemplate>                 </Setter.Value>             </Setter> </Style>

<Window x:Class="WpfPieControl.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:WpfPieControl"         mc:Ignorable="d"         Title="微信公众号：WPF开发者" Height="450" Width="800">     <StackPanel>         <WrapPanel Margin="10">             <local:PieControl PieSegmentModels="{Binding PieSegmentModels,RelativeSource={RelativeSource AncestorType=local:MainWindow}}" ArcThickness="1"/>             <local:PieControl PieSegmentModels="{Binding PieSegmentModels,RelativeSource={RelativeSource AncestorType=local:MainWindow}}"                                    Margin="4,0"                                   ArcThickness="{Binding ElementName=PRAT_Slider,Path=Value}"/>             <local:PieControl PieSegmentModels="{Binding PieSegmentModels,RelativeSource={RelativeSource AncestorType=local:MainWindow}}" ArcThickness="0.65"/>         </WrapPanel>         <Slider Maximum="0.9" Minimum="0.1" x:Name="PRAT_Slider" Margin="10" Width="200"/>         <Button Content="更新" Click="Button_Click" VerticalAlignment="Bottom" Width="200"/>     </StackPanel> </Window>

using System; using System.Collections.Generic; using System.Collections.ObjectModel; 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 WpfPieControl.Models;  namespace WpfPieControl {     /// <summary>     /// MainWindow.xaml 的交互逻辑     /// </summary>     public partial class MainWindow : Window     {         public ObservableCollection<PieSegmentModel> PieSegmentModels         {             get { return (ObservableCollection<PieSegmentModel>)GetValue(PieSegmentModelsProperty); }             set { SetValue(PieSegmentModelsProperty, value); }         }          public static readonly DependencyProperty PieSegmentModelsProperty =             DependencyProperty.Register("PieSegmentModels", typeof(ObservableCollection<PieSegmentModel>), typeof(MainWindow), new PropertyMetadata(null));          List<ObservableCollection<PieSegmentModel>> collectionList = new List<ObservableCollection<PieSegmentModel>>();         public MainWindow()         {             InitializeComponent();              PieSegmentModels = new ObservableCollection<PieSegmentModel>();             var collection1 = new ObservableCollection<PieSegmentModel>();             collection1.Add(new PieSegmentModel { Name = "一", Value = 10 });             collection1.Add(new PieSegmentModel { Name = "二", Value = 20 });             collection1.Add(new PieSegmentModel { Name = "三", Value = 25 });             collection1.Add(new PieSegmentModel { Name = "四", Value = 45 });             var collection2 = new ObservableCollection<PieSegmentModel>();             collection2.Add(new PieSegmentModel { Name = "一", Value = 30 });             collection2.Add(new PieSegmentModel { Name = "二", Value = 15 });             collection2.Add(new PieSegmentModel { Name = "三", Value = 10 });             collection2.Add(new PieSegmentModel { Name = "四", Value = 55 });             collectionList.AddRange(new[] { collection1, collection2 });              PieSegmentModels = collectionList[0];         }         bool isRefresh = false;         private void Button_Click(object sender, RoutedEventArgs e)         {             if (!isRefresh)                 PieSegmentModels = collectionList[1];             else                 PieSegmentModels = collectionList[0];             isRefresh = !isRefresh;          }     } }