C# 8. 在新窗口中使用chart控件波形移动显示

1. 添加新窗口

在Form1中新建button控件，名称为buttonStartWaveDisp，这样单击就能调出Form2窗口
在Form1中增加如下：

  private void buttonStartWaveDisp_Click(object sender, EventArgs e)
    {
    
    
        if((form2 == null) || (form2.IsDisposed == true))
        {
    
    
             form2 = new Form2();
             form2.Show();
        }
        else
        {
    
    
            form2.Activate();
        }
    }

2. 在Form2上添加chart1、“画图”button

修改属性

轴参数




Form.Designer.cs自动生成的部分代码如下

// 
// chart1
// 
chartArea2.AxisX.Maximum = 60D;
chartArea2.AxisX.Minimum = -10D;
chartArea2.AxisY.Maximum = 300D;
chartArea2.Name = "ChartArea1";
this.chart1.ChartAreas.Add(chartArea2);
legend2.Name = "Legend1";
this.chart1.Legends.Add(legend2);
this.chart1.Location = new System.Drawing.Point(16, 18);
this.chart1.Name = "chart1";
series2.ChartArea = "ChartArea1";
series2.ChartType = System.Windows.Forms.DataVisualization.Charting.SeriesChartType.Spline;
series2.Legend = "Legend1";
series2.Name = "AD";
this.chart1.Series.Add(series2);
this.chart1.Size = new System.Drawing.Size(685, 388);
this.chart1.TabIndex = 0;
this.chart1.Text = "chart1";
// 
// timer1
// 
this.timer1.Tick += new System.EventHandler(this.timer1_Tick);

private System.Windows.Forms.DataVisualization.Charting.Chart chart1;
private System.Windows.Forms.Button buttonPointDisp;
private System.Windows.Forms.Timer timer1;

3. 代码如下：

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;

namespace WaveTest
{
    
    
    public partial class Form2 : Form
    {
    
    
        private int counter = 0;
        private int index = 0;
        private int fullFlag = 0;
        private const int counterMax = 50;
        private byte[] dataBuf = new byte[counterMax];
        public Form2()
        {
    
    
            InitializeComponent();
        }
        public void PointDisp(byte dat8)
        {
    
    
            chart1.Series[0].Points.Clear();
            dataBuf[index] = dat8;
            int j;
            if (fullFlag == 0)
            {
    
    
                if (++counter == counterMax)
                {
    
    
                    fullFlag = 1;
                }
                j = 0;
            }
            else
            {
    
    
                j = index + 1;
            }

            for (int i = 0; i < counter; i++,j++)
            {
    
    
                if(j == counterMax)
                {
    
    
                    j = 0;
                }
                chart1.Series[0].Points.AddXY(i, dataBuf[j]);
            }
            if (++index == counterMax)
            {
    
    
                index = 0;
            }
        }

        private void buttonPointDisp_Click(object sender, EventArgs e)
        {
    
    
            Random ra = new Random();
            byte dat8 = (byte)(ra.Next() % 256);
            PointDisp(dat8);
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
    
    
            Random ra = new Random();
            byte dat8 = (byte)(ra.Next() % 256);
            PointDisp(dat8);
        }
    }
}

4. 实际效果

按一次画图，生成一个随机数，0~49，移动显示