WPF动态模拟CPU 使用率图表

1.在管理Nuget程序包中下载DynamicDataDisplay

2.XAML代码：

添加命名空间：xmlns:d3="http://research.microsoft.com/DynamicDataDisplay/1.0"

效果图：

3.MainWindow.xaml.cs代码

using Microsoft.Research.DynamicDataDisplay;
using Microsoft.Research.DynamicDataDisplay.DataSources;
using System;
using System.Collections.Generic;
using System.Diagnostics;
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 System.Windows.Threading;

namespace WpfCPUDemo
{
    /// 

    /// MainWindow.xaml 的交互逻辑
    /// 
    public partial class MainWindow : Window
    {
        //通过ObservableDataSource 动态存储图表坐标点，PerformanceCounter 获取CPU使用率数值，DispatcherTimer 计时器在规定间隔进行取数操作，整型i 作为CPU使用率坐标点的X轴数值。
        private ObservableDataSource datasource = new ObservableDataSource();
        private PerformanceCounter cpuPerformace = new PerformanceCounter();
        private DispatcherTimer timer = new DispatcherTimer();
        private int i = 0;
        public MainWindow()
        {
            InitializeComponent();
        }

        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            //AddLineGraph 方法将dataSource 中的坐标点绘制到图表中，曲线颜色定义为绿色，粗细设置为2，曲线名称为"Percentage"。设置计时器间隔为1秒，连续执行AnimatedPlot 事件实时绘制新坐标点
            plotter.AddLineGraph(datasource, Colors.Green, 2, "Percentage");
            timer.Interval = TimeSpan.FromSeconds(1);
            timer.Tick += new EventHandler(AnimatedPlot);
            timer.IsEnabled = true;
            plotter.Viewport.FitToView();
        }
        //AnimatedPlot 事件用于构造坐标点，通过设置cpuPerformance 相关参数，并使用NextValue() 方法获取当前CPU使用率数据作为Y值，整型i 作为X值。将X、Y值构造为坐标点（Point），并通过异步方式存储在dataSource 中
        private void AnimatedPlot(object sender, EventArgs e)
        {
            cpuPerformace.CategoryName = "Processor";
            cpuPerformace.CounterName = "% Processor Time";
            cpuPerformace.InstanceName = "_Total";
            double x = i;
            double y = cpuPerformace.NextValue();
            Point point = new Point(x,y);
            datasource.AppendAsync(base.Dispatcher, point);
            cpuUsageText.Text = String.Format("{0:0}%",y);
            i++;
        }
    }
}

最终效果图：鼠标右键可将图表拷贝到其他文档，鼠标左键拖动图表浏览任意位置曲线数据，鼠标中键可以缩放显示曲线图。