此Demo是采用VS自带的Chart图表控件,制作实时动态显示的折线图,和波形图。本文仅供学习分享使用,如有不足之处,还请指正。
涉及知识点:
Chart控件的相关概念:
主要有两个方法:
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效果图
波形图【波形图,是取正玄值,并放大50倍,然后上移50】
如下【先点击初始化按钮,再点击开始按钮】:
折线图【折线图,是取[0,100]之间的随即数进行填充】:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Windows.Forms.DataVisualization.Charting;
namespace WindowsFormsApp14
{
public partial class Form1 : Form
{
private Queue<double> dataQueue = new Queue<double>(100);
private int curValue = 0;
private int num = 5;//每次删除增加几个点
public Form1()
{
InitializeComponent();
}
/// <summary>
/// 初始化事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnInit_Click(object sender, EventArgs e)
{
InitChart();
}
/// <summary>
/// 开始事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnStart_Click(object sender, EventArgs e)
{
//this.timer1.Start();
timer1.Enabled = true;
//MessageBox.Show("123456");
}
/// <summary>
/// 停止事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnStop_Click(object sender, EventArgs e)
{
// this.timer1.Stop();
timer1.Enabled = false;
}
/// <summary>
/// 定时器事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void timer1_Tick(object sender, EventArgs e)
{
UpdateQueueValue();
this.chart1.Series[0].Points.Clear();
for (int i = 0; i < dataQueue.Count; i++)
{
this.chart1.Series[0].Points.AddXY((i + 1), dataQueue.ElementAt(i));
}
}
/// <summary>
/// 初始化图表
/// </summary>
private void InitChart()
{
//定义图表区域
this.chart1.ChartAreas.Clear();
ChartArea chartArea1 = new ChartArea("C1");
this.chart1.ChartAreas.Add(chartArea1);
//定义存储和显示点的容器
this.chart1.Series.Clear();
Series series1 = new Series("S1");
series1.ChartArea = "C1";
this.chart1.Series.Add(series1);
//设置图表显示样式
this.chart1.ChartAreas[0].AxisY.Minimum = 0;
this.chart1.ChartAreas[0].AxisY.Maximum = 100;
this.chart1.ChartAreas[0].AxisX.Interval = 5;
this.chart1.ChartAreas[0].AxisX.MajorGrid.LineColor = System.Drawing.Color.Silver;
this.chart1.ChartAreas[0].AxisY.MajorGrid.LineColor = System.Drawing.Color.Silver;
//设置标题
this.chart1.Titles.Clear();
this.chart1.Titles.Add("S01");
this.chart1.Titles[0].Text = "XXX显示";
this.chart1.Titles[0].ForeColor = Color.RoyalBlue;
this.chart1.Titles[0].Font = new System.Drawing.Font("Microsoft Sans Serif", 12F);
//设置图表显示样式
this.chart1.Series[0].Color = Color.Red;
if (rb1.Checked)
{
this.chart1.Titles[0].Text = string.Format("XXX {0} 显示", rb1.Text);
this.chart1.Series[0].ChartType = SeriesChartType.Line;
}
if (rb2.Checked)
{
this.chart1.Titles[0].Text = string.Format("XXX {0} 显示", rb2.Text);
this.chart1.Series[0].ChartType = SeriesChartType.Spline;
}
this.chart1.Series[0].Points.Clear();
}
//更新队列中的值
private void UpdateQueueValue()
{
if (dataQueue.Count > 100)
{
//先出列
for (int i = 0; i < num; i++)
{
dataQueue.Dequeue();
}
}
if (rb1.Checked)
{
Random r = new Random();
for (int i = 0; i < num; i++)
{
dataQueue.Enqueue(r.Next(0, 100));
}
}
if (rb2.Checked)
{
for (int i = 0; i < num; i++)
{
//对curValue只取[0,360]之间的值
curValue = curValue % 360;
//对得到的正玄值,放大50倍,并上移50
dataQueue.Enqueue((50 * Math.Sin(curValue * Math.PI / 180)) + 50);
curValue = curValue + 10;
}
}
}
private void Form1_Load(object sender, EventArgs e)
{
}
}
}
备注
关于定时器Timer【微软自带的控件】:
说明:表示在相同的时间间隔,引发用户自定义的事情 。实现用户需要的功能。本例中是用来定时更新队列中的数据,并刷新图表。
常用说明: