C# Chart控件动态数据实时标记与滚动展示方法

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Windows.Forms.DataVisualization.Charting;

namespace TestIC00
{
    public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
        }

        private void Form2_Load(object sender, EventArgs e)
        {

        }
        // 用于追踪当前最新数据点的索引
        public int index = 0;
        // 标记模式开关：true=仅标记最新，false=标记所有
        public bool flag = false;
        
        // 按钮1：控制定时器启停
        private void button1_Click(object sender, EventArgs e)
        {
            timer1.Enabled = !timer1.Enabled;//切换定时器状态，模拟数据开始或停止流入
        }
        
        // 按钮2：切换标记显示逻辑
        private void button2_Click(object sender, EventArgs e)
        {
            flag = !flag;//反转标记状态标志位
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            Random random = new Random();
            // 1. 基础样式配置：设置网格与刻度
            this.chart1.ChartAreas[0].AxisX.MajorGrid.Interval = 1;
            this.chart1.ChartAreas[0].AxisX.MinorGrid.Interval = 1;
            this.chart1.ChartAreas[0].AxisY.MajorGrid.Interval = 1;
            this.chart1.ChartAreas[0].AxisY.MinorGrid.Interval = 1;
            this.chart1.ChartAreas[0].AxisX.LabelStyle.Interval = 1;
            this.chart1.ChartAreas[0].AxisX.MajorGrid.LineColor = Color.Gray;
            this.chart1.ChartAreas[0].AxisY.MajorGrid.LineColor = Color.Gray;
            
            // 2. 滚动与隐藏配置
            chart1.ChartAreas[0].AxisX.ScrollBar.Enabled = true;//启用X轴滚动条
            this.chart1.ChartAreas[0].AxisY.LabelStyle.Enabled = false;//隐藏Y轴刻度标签
            chart1.ChartAreas[0].AxisX.ScaleView.Scroll(System.Windows.Forms.DataVisualization.Charting.ScrollType.Last);//视图滚动至最新
            
            // 3. 数据注入
            int value = random.Next(0, 20); // 生成0到20之间的随机数
            chart1.Series[0].Points.AddY(value); // 添加新数据点
            
            // 4. 标记处理逻辑
            if(flag) // 如果开启“仅标记最新”模式
            {
                // 清除前一个点的标记，避免堆积
                this.chart1.Series[0].Points[index].MarkerStyle = MarkerStyle.Circle;
                this.chart1.Series[0].Points[index].MarkerColor = Color.Red;
                this.chart1.Series[0].Points[index].MarkerBorderWidth = 3;
                this.chart1.Series[0].Points[index].MarkerSize = 10;
                this.chart1.Series[0].Points[index].Label = "功能：" + this.chart1.Series[0].Name + "\r\n" + "值：" + value.ToString();
                this.chart1.Series[0].Points[index].IsValueShownAsLabel = true;
                
                this.chart1.Series[0].Points[index-1].MarkerBorderWidth = 0;
                this.chart1.Series[0].Points[index - 1].MarkerSize = 0;
                this.chart1.Series[0].Points[index - 1].Label = "";
                this.chart1.Series[0].Points[index - 1].IsValueShownAsLabel = false;
            }
            else // 否则标记所有点
            {
                this.chart1.Series[0].Points[index].MarkerStyle = MarkerStyle.Circle;
                this.chart1.Series[0].Points[index].MarkerColor = Color.Red;
                this.chart1.Series[0].Points[index].MarkerBorderWidth = 3;
                this.chart1.Series[0].Points[index].MarkerSize = 10;
                this.chart1.Series[0].Points[index].Label = "功能：" + this.chart1.Series[0].Name + "\r\n" + "值：" + value.ToString();
                this.chart1.Series[0].Points[index].IsValueShownAsLabel = true;
            }
           
            index++; // 移动索引指向最新的数据点
        }
    }
}