本文看了博客WPF编程，Live Charts使用说明（2）——使用_func<chartpoint, string> labelpoint-CSDN博客，这里作为笔记用。

1.前端代码

前端XAML文件代码如下：

<Window x:Class="livechart1.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:livechart1"xmlns:lvc="clr-namespace:LiveCharts.Wpf;assembly=LiveCharts.Wpf"mc:Ignorable="d"Title="MainWindow" Height="450" Width="800"><Grid><Grid.RowDefinitions><RowDefinition Height="40"/><RowDefinition/></Grid.RowDefinitions><StackPanel Orientation="Horizontal" VerticalAlignment="Center" Margin="10 0 0 0"><Button Width="80" Height="30" Margin="5 0 0 0" Content="折线图" Click="Button_Click"/><Button Width="80" Height="30" Margin="5 0 0 0" Content="直方图" Click="Button_Click_1"/><Button Width="80" Height="30" Margin="5 0 0 0" Content="饼状图" Click="Button_Click_2"/></StackPanel><Grid Grid.Row="1"><Grid.ColumnDefinitions><ColumnDefinition/><ColumnDefinition/><ColumnDefinition/></Grid.ColumnDefinitions><lvc:CartesianChart Name="s1" LegendLocation="Top"><lvc:CartesianChart.AxisY><lvc:Axis Name="s1y" Title="分数" MinValue="0"></lvc:Axis></lvc:CartesianChart.AxisY><lvc:CartesianChart.AxisX><lvc:Axis Name="s1x" Title="区域" ></lvc:Axis></lvc:CartesianChart.AxisX></lvc:CartesianChart><lvc:CartesianChart Name="s2" Grid.Column="1" LegendLocation="Top"><lvc:CartesianChart.AxisX><lvc:Axis Name="s2y" Title="区域" ></lvc:Axis></lvc:CartesianChart.AxisX><lvc:CartesianChart.AxisY><lvc:Axis Name="s2x" Title="分数" MinValue="0"></lvc:Axis></lvc:CartesianChart.AxisY></lvc:CartesianChart><lvc:PieChart Name="s3" LegendLocation="Top" Grid.Column="2"/></Grid></Grid>
</Window>

以上代码中，<Grid>上面的代码是自己生成的，里面有一行是我们加入的，这一行是：

xmlns:lvc="clr-namespace:LiveCharts.Wpf;assembly=LiveCharts.Wpf"

<Grid> ...</Grid>之间的所有代码复制到里面就行。

2.后端代码

在cs文件中的代码如下：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
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 LiveCharts;
using LiveCharts.Wpf;
using static System.Net.WebRequestMethods;namespace livechart1
{/// <summary>/// MainWindow.xaml 的交互逻辑/// </summary>public partial class MainWindow : Window{public MainWindow(){InitializeComponent();}//1.折线图private void Button_Click(object sender, RoutedEventArgs e){SeriesCollection series = new SeriesCollection{new LineSeries{Title = "深圳",Values = new ChartValues<double> {4,6,5,2,7}},new LineSeries{Title = "广州",Values = new ChartValues<double> { 6, 7, 3, 4 ,6 }}};//x轴string[] Labels = new[] { "2011", "2012", "2013", "2014", "2015" };s1.Series = series;s1x.Labels = Labels;s1y.Separator.Step = 1;s1y.LabelFormatter = new Func<double, string>((value) =>{return value.ToString();});}//2.柱状图private void Button_Click_1(object sender, RoutedEventArgs e){SeriesCollection SeriesCollection = new SeriesCollection{new ColumnSeries{Title = "深圳",Values = new ChartValues<double> { 10, 50, 39, 50 }},new ColumnSeries{Title = "广州",Values = new ChartValues<double> { 11, 56, 42 }}};string[] Labels = new[] { "2011", "2012", "2013", "2014", "2015" };s2.Series = SeriesCollection;s2x.Labels = Labels;s2y.Separator.Step = 1;}// 3.饼图private void Button_Click_2(object sender, RoutedEventArgs e){SeriesCollection SeriesCollection = new SeriesCollection();SeriesCollection.Add(new PieSeries(){Title = "高一(1)班",Values = new ChartValues<int>() { 30 },DataLabels = true,LabelPoint = new Func<ChartPoint, string>((chartPoint) =>{return string.Format("{0}{1} ({2:P})", chartPoint.SeriesView.Title, chartPoint.Y, chartPoint.Participation);})});SeriesCollection.Add(new PieSeries(){Title = "高一(2)班",Values = new ChartValues<int>() { 50 },DataLabels = true,LabelPoint = new Func<ChartPoint, string>((chartPoint) =>{return string.Format("{0}{1} ({2:P})", chartPoint.SeriesView.Title, chartPoint.Y, chartPoint.Participation);})});SeriesCollection.Add(new PieSeries(){Title = "高一(3)班",Values = new ChartValues<int>() { 20 },DataLabels = true,LabelPoint = new Func<ChartPoint, string>((chartPoint) =>{return string.Format("{0}{1} ({2:P})", chartPoint.SeriesView.Title, chartPoint.Y, chartPoint.Participation);})});s3.Series = SeriesCollection;}}
}

在以上代码中，头文件有LiveCharts，这个我们需要进入 工具--->NuNet 包管理器--->管理解决方案，进入后搜索LiveCharts，然后点击安装即可。

3.最终效果

最后运行代码，运行结果如下：