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 bool flag = false;
        private void button1_Click(object sender, EventArgs e)
        {
            timer1.Enabled = !timer1.Enabled;//對定時器的操作，點擊打開或關(guān)閉定時器，主要是實現(xiàn)一秒傳一個值
        }
        private void timer1_Tick(object sender, EventArgs e)
        {
            Random random = new Random();
            this.chart1.ChartAreas[0].AxisX.MajorGrid.Interval = 1;//網(wǎng)格間隔
            this.chart1.ChartAreas[0].AxisX.MinorGrid.Interval = 1;
            this.chart1.ChartAreas[0].AxisY.MajorGrid.Interval = 1;//網(wǎng)格間隔
            this.chart1.ChartAreas[0].AxisY.MinorGrid.Interval = 1;
            this.chart1.ChartAreas[0].AxisX.LabelStyle.Interval = 1;//設(shè)置X軸的值的間隔大小
            this.chart1.ChartAreas[0].AxisX.MajorGrid.LineColor = Color.Gray;//設(shè)置X軸網(wǎng)格線顏色
            this.chart1.ChartAreas[0].AxisY.MajorGrid.LineColor = Color.Gray;//設(shè)置Y軸網(wǎng)格線顏色
            chart1.ChartAreas[0].AxisX.ScrollBar.Enabled = true;//啟動滾動條
            this.chart1.ChartAreas[0].AxisY.LabelStyle.Enabled = false;//使Y軸的刻度隱藏
            chart1.ChartAreas[0].AxisX.ScaleView.Scroll(System.Windows.Forms.DataVisualization.Charting.ScrollType.Last);//啟用視圖實現(xiàn)數(shù)據(jù)滾動
            int value = random.Next(0, 20);//產(chǎn)生隨機(jī)數(shù)進(jìn)行賦值
            chart1.Series[0].Points.AddY(value);//對折線圖添加數(shù)據(jù)
            if(flag)//判斷標(biāo)記，如果是true表示只標(biāo)記最新，需要去掉前面的一個值
            {
                this.chart1.Series[0].Points[index].MarkerStyle = MarkerStyle.Circle;//設(shè)置標(biāo)記的形狀為圓形
                this.chart1.Series[0].Points[index].MarkerColor = Color.Red;//形狀顏色設(shè)置
                this.chart1.Series[0].Points[index].MarkerBorderWidth = 3;//形狀大小設(shè)置
                this.chart1.Series[0].Points[index].MarkerSize = 10;//設(shè)置我們展示標(biāo)記的大小
                this.chart1.Series[0].Points[index].Label = "功能：" + this.chart1.Series[0].Name + "\r\n" + "值：" + value.ToString();//對標(biāo)記展示的值
                this.chart1.Series[0].Points[index].IsValueShownAsLabel = true;//展示標(biāo)記
                this.chart1.Series[0].Points[index-1].MarkerBorderWidth = 0;//改前一個標(biāo)記的大小
                this.chart1.Series[0].Points[index - 1].MarkerSize = 0;//形狀大小
                this.chart1.Series[0].Points[index - 1].Label = "";//展示數(shù)據(jù)
                this.chart1.Series[0].Points[index - 1].IsValueShownAsLabel = false;//不展示
            }
            else//對數(shù)據(jù)一直標(biāo)記
            {
                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;
            }
           //也可以加一種狀態(tài)是什么也不標(biāo)記，你們自己對那個狀態(tài)值的處理就可以啦
            index++;
        }

        private void button2_Click(object sender, EventArgs e)//只標(biāo)記最新按鈕
        {
            flag = !flag;//對狀態(tài)值的改變，我就使用了兩種狀態(tài)，你們可以改
        }
    }
}