C# Chart控件

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)
        {

        }
        public int index = 0;
        public int x = 0;
        public bool flag = false;
        private void button1_Click(object sender, EventArgs e)
        {
            timer1.Enabled = !timer1.Enabled;
        }
        private void timer1_Tick(object sender, EventArgs e)
        {
            Random random = new Random();
            this.chart1.ChartAreas[0].AxisX.MajorGrid.Interval = 1;//网格间隔
            this.chart1.ChartAreas[0].AxisX.MinorGrid.Interval = 1;
            this.chart1.ChartAreas[0].AxisY.MajorGrid.Interval = 1;//网格间隔
            this.chart1.ChartAreas[0].AxisY.MinorGrid.Interval = 1;
            this.chart1.ChartAreas[0].AxisX.LabelStyle.Interval = 1;//设置X轴的值的间隔大小
            this.chart1.ChartAreas[0].AxisX.MajorGrid.LineColor = Color.Gray;//设置X轴网格线颜色
            this.chart1.ChartAreas[0].AxisY.MajorGrid.LineColor = Color.Gray;//设置Y轴网格线颜色
            chart1.ChartAreas[0].AxisX.ScrollBar.Enabled = true;//启动滚动条
            this.chart1.ChartAreas[0].AxisY.LabelStyle.Enabled = false;//使Y轴的刻度隐藏
            chart1.ChartAreas[0].AxisX.ScaleView.Scroll(System.Windows.Forms.DataVisualization.Charting.ScrollType.Last);//启用视图实现数据滚动
            int value = random.Next(0, 20);//产生随机数进行赋值
            chart1.Series[0].Points.AddXY(x,value);//对折线图添加数据
            x++;
            if (flag)//判断标记，如果是true表示只标记最新，需要去掉前面的一个值
            {
                this.chart1.Series[0].Points[index].MarkerStyle = MarkerStyle.Circle;//设置标记的形状为圆形
                this.chart1.Series[0].Points[index].MarkerColor = Color.Red;//形状颜色设置
                this.chart1.Series[0].Points[index].MarkerBorderWidth = 3;//形状大小设置
                this.chart1.Series[0].Points[index].MarkerSize = 10;//设置我们展示标记的大小
                this.chart1.Series[0].Points[index].Label = "功能：" + this.chart1.Series[0].Name + "\r\n" + "值：" + value.ToString();//对标记展示的值
                this.chart1.Series[0].Points[index].IsValueShownAsLabel = true;//展示标记
                this.chart1.Series[0].Points[index - 1].MarkerBorderWidth = 0;//改前一个标记的大小
                this.chart1.Series[0].Points[index - 1].MarkerSize = 0;//形状大小
                this.chart1.Series[0].Points[index - 1].Label = "";//展示数据
                this.chart1.Series[0].Points[index - 1].IsValueShownAsLabel = false;//不展示
            }
            else//对数据一直标记
            {
                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;
            }
            //也可以加一种状态是什么也不标记，你们自己对那个状态值的处理就可以啦
            index++;
        }

        private void button2_Click(object sender, EventArgs e)
        {
            flag = !flag;
        }

        private void chart1_MouseClick(object sender, MouseEventArgs e)
        {
            HitTestResult mytestresult = new HitTestResult();//它表示命中测试的返回值
            mytestresult = chart1.HitTest(e.X, e.Y);//获取我们Chart控件的折线图在这个坐标的值
            if (e.Button == MouseButtons.Left)//判断是否是鼠标左键点击
            {
                if (mytestresult.ChartElementType == ChartElementType.DataPoint)//判断我们点击这个返回集是否是chart的数据点的类型
                {
                    toolTip1.AutoPopDelay = 5000;//表示tooltip在这个控件中保留展示的时间
                    toolTip1.InitialDelay = 1000;//表示鼠标指针必须在这里静止的时间
                    toolTip1.ReshowDelay = 500;//可以缩短或延长在显示上一个工具提示窗口后显示工具提示窗口之前等待的时间tooltip
                    toolTip1.ShowAlways = true;//获取或设置一个值，该值指示是否显示工具提示窗口，甚至是在其父控件不活动的时候。

                    try
                    {
                        toolTip1.SetToolTip(chart1, "名称：" + mytestresult.Series.Name + "\r\n" +"值："+chart1.Series[0].Points[mytestresult.PointIndex]);//设置ToolTip展示的值的内容，mytestresult.Series.Name表示折线的名字，chart1.Series[0].Points[mytestresult.PointIndex]表示chart图表中的第0（从0开始也就是第一条）条折线的数据点的第多少个，
//也可以设置chart1.Series[0].Points[mytestresult.PointIndex].XValue;这个代表你点击这个点的x轴的值，chart1.Series[0].Points[mytestresult.PointIndex].YValues[0];这个代表你点击的点Y轴的值
                   
                    }
                    catch (Exception)
                    {

                    }
                }
            }
        }
    }
}