WPF仿LiveCharts实现饼图的绘制-C#/.NET开发

这篇文章主要介绍了如何利用WPF仿LiveCharts实现饼图的绘制，文中的示例代码讲解详细，对我们学习或工作有一定帮助，需要的可以参考一下

前言

有小伙伴需要统计图。

效果预览（更多效果请下载源码体验）

一、PieControl.cs

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)));
        }
    }
}

二、App.xaml

<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>

三、MainWindow.xaml

<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>

四、MainWindow.xaml.cs

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;

        }
    }
}

到此这篇关于WPF仿LiveCharts实现饼图的绘制的文章就介绍到这了,更多相关WPF饼图内容请搜索得得之家以前的文章希望大家以后多多支持得得之家！