本段代码是一个封装的用户控件

<UserControl x:Class="YF_Frame.PerformanceMonitor"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:lvc="clr-namespace:LiveCharts.Wpf;assembly=LiveCharts.Wpf"mc:Ignorable="d" d:DesignHeight="300" d:DesignWidth="300" ><lvc:CartesianChart Series="{Binding SeriesCollection}" LegendLocation="Right" Background="{DynamicResource BackgroundBrush}" Foreground="{DynamicResource TextBrush}"><lvc:CartesianChart.AxisY><lvc:Axis Title="使用率 (%)" LabelFormatter="{Binding YFormatter}" MinValue="0" MaxValue="100" Foreground="{DynamicResource TextBrush}"></lvc:Axis></lvc:CartesianChart.AxisY><lvc:CartesianChart.AxisX><lvc:Axis Title="时间" Labels="{Binding Labels}" Foreground="{DynamicResource TextBrush}"></lvc:Axis></lvc:CartesianChart.AxisX></lvc:CartesianChart>
</UserControl>

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.Defaults;
using LiveCharts.Wpf;
using LiveCharts;
using System.Management;
using System.Diagnostics;
using System.Windows.Threading;
using System.ComponentModel;namespace YF_Frame
{/// <summary>/// PerformanceMonitor.xaml 的交互逻辑/// </summary>public partial class PerformanceMonitor : UserControl, INotifyPropertyChanged{public event PropertyChangedEventHandler PropertyChanged;protected virtual void OnPropertyChanged(string propertyName = null){PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));}public SeriesCollection SeriesCollection { get; set; }public string[] Labels { get; set; }public Func<double, string> YFormatter { get; set; }private PerformanceCounter cpuCounter;private PerformanceCounter ramCounter;public PerformanceMonitor(){InitializeComponent();SeriesCollection = new SeriesCollection{new LineSeries{Title = "CPU",Values = new ChartValues<ObservableValue>{new ObservableValue(0),new ObservableValue(0),new ObservableValue(0),new ObservableValue(0),new ObservableValue(0),new ObservableValue(0)},PointGeometry = DefaultGeometries.Circle,PointGeometrySize = 10},new LineSeries{Title = "内存",Values = new ChartValues<ObservableValue>{new ObservableValue(0),new ObservableValue(0),new ObservableValue(0),new ObservableValue(0),new ObservableValue(0),new ObservableValue(0)},PointGeometry = DefaultGeometries.Square,PointGeometrySize = 10}}; Labels = new[] { "1分钟前", "50秒前", "40秒前", "30秒前", "20秒前", "现在" };YFormatter = value => value.ToString("N0");DataContext = this;// 初始化CPU计数器（全局CPU使用率）cpuCounter = new PerformanceCounter("Processor",         // 类别（处理器）"% Processor Time",  // 计数器名称（CPU时间百分比）"_Total"             // 实例名称（_Total表示所有核心）);// 初始化内存计数器（可用内存百分比）ramCounter = new PerformanceCounter("Memory",           // 类别（内存）"Available MBytes"   // 计数器名称（可用内存MB）);// 启动定时器刷新数据（每1秒更新一次）DispatcherTimer timer = new DispatcherTimer();timer.Interval = TimeSpan.FromSeconds(5);timer.Tick += UpdatePerformanceData;timer.Start();}private void UpdatePerformanceData(object sender, EventArgs e){try{// 获取CPU使用率（取当前值）float cpuUsage = cpuCounter.NextValue();// 获取可用内存（MB）float availableMemoryMB = ramCounter.NextValue();// 计算已用内存（假设总内存16GB，你可以替换为实际值）float totalMemoryMB = 16 * 1024; // 16GB = 16 * 1024 MBfloat usedMemoryMB = totalMemoryMB - availableMemoryMB;float memoryUsagePercent = (usedMemoryMB / totalMemoryMB) * 100;// 更新图表数据UpdateChartData(cpuUsage, memoryUsagePercent);// 更新标签（可选：显示最新数据）Labels = new[] { "25秒前", "20秒前", "15秒前", "10秒前", "5秒前", "现在" };OnPropertyChanged(nameof(Labels)); // 通知UI更新}catch (Exception ex){// 由于 Windows 性能计数器损坏 => cmd lodctr / R}}private void UpdateChartData(float cpuUsage, float memoryUsage){// 获取当前CPU和内存的数据序列var cpuSeries = SeriesCollection[0].Values as ChartValues<ObservableValue>;var memorySeries = SeriesCollection[1].Values as ChartValues<ObservableValue>;// 移除最旧的数据点（保持6个数据点）if (cpuSeries.Count >= 6){cpuSeries.RemoveAt(0);memorySeries.RemoveAt(0);}// 添加新的数据点cpuSeries.Add(new ObservableValue(cpuUsage));memorySeries.Add(new ObservableValue(memoryUsage));}}
}