当前位置： 首页 > news >正文

开源 C# 快速开发（四）自定义控件--波形图

news 2025/9/27 6:32:03

        文章的目的为了记录使用C# 开发学习的经历。开发流程和要点有些记忆模糊，赶紧记录，防止忘记。

 相关链接：

开源 C# 快速开发（一）基础知识

开源 C# 快速开发（二）基础控件

开源 C# 快速开发（三）复杂控件

开源 C# 快速开发（四）自定义控件--波形图

开源 C# 快速开发（五）自定义控件--仪表盘

推荐链接:

开源 C# .net mvc 开发（一）WEB搭建_c#部署web程序-CSDN博客

开源 C# .net mvc 开发（二）网站快速搭建_c#网站开发-CSDN博客

开源 C# .net mvc 开发（三）WEB内外网访问-CSDN博客

开源 C# .net mvc 开发（四）工程结构、页面提交以及显示-CSDN博客

开源 C# .net mvc 开发（五）常用代码快速开发_c# mvc开发-CSDN博客

开源 C# .net mvc 开发（六）发送邮件、定时以及CMD编程-CSDN博客

开源 C# .net mvc 开发（七）动态图片、动态表格和json数据生成-CSDN博客

开源 C# .net mvc 开发（八）IIS Express轻量化Web服务器的配置和使用-CSDN博客

开源 C# .net mvc 开发（九）websocket--服务器与客户端的实时通信-CSDN博客

本章节主要内容是:一个使用C# WinForms实现的实时波形图显示应用程序。展示了一个完整的实时数据可视化应用，包含了UI构建、事件处理、定时器管理和资源清理等关键环节。

1.源码分析

2.所有源码

3.效果演示

一、源码分析

1. WaveformChart 类详细分析
1.1 构造函数和初始化

public WaveformChart()
{// 初始化数据系列 - 创建3个空的数据列表_dataSeries = new List<List<PointF>>();for (int i = 0; i < 3; i++){_dataSeries.Add(new List<PointF>());}// 启用双缓冲防止闪烁this.DoubleBuffered = true;this.BackColor = _backgroundColor;this.Size = new Size(600, 400);// 生成测试数据InitializeTestData();
}



InitializeTestData() 函数：

private void InitializeTestData()
{Random rand = new Random();for (int series = 0; series < 3; series++){for (int i = 0; i < 100; i++){float x = i;// 生成带相位偏移和噪声的正弦波float y = (float)(Math.Sin(i * 0.1 + series * 2) * 0.8 + rand.NextDouble() * 0.2 - 0.1);_dataSeries[series].Add(new PointF(x, y));}}
}


1.2 数据操作函数
AddDataPoint() 函数：


public void AddDataPoint(int seriesIndex, float x, float y)
{// 参数验证if (seriesIndex < 0 || seriesIndex >= _dataSeries.Count)return;// 添加新数据点_dataSeries[seriesIndex].Add(new PointF(x, y));// 内存管理：限制数据点数量为500if (_dataSeries[seriesIndex].Count > 500){_dataSeries[seriesIndex].RemoveAt(0); // 移除最旧的数据}// 自动调整X轴范围（滚动显示）if (x > _xMax){_xMax = x + 10; // 预留10个单位的空间}Invalidate(); // 触发重绘
}


AddDataPoints() 函数：


public void AddDataPoints(int seriesIndex, IEnumerable<PointF> points)
{if (seriesIndex < 0 || seriesIndex >= _dataSeries.Count)return;_dataSeries[seriesIndex].AddRange(points); // 批量添加数据Invalidate();
}
ClearData() 函数：csharp
public void ClearData(int seriesIndex = -1)
{if (seriesIndex == -1) // 清除所有系列{foreach (var series in _dataSeries){series.Clear();}}else if (seriesIndex >= 0 && seriesIndex < _dataSeries.Count) // 清除指定系列{_dataSeries[seriesIndex].Clear();}Invalidate();
}


1.3 坐标转换函数
ValueToPixelX() 和 ValueToPixelY()：


private float ValueToPixelX(float xValue)
{// 线性映射：数据值 → 像素坐标return _plotArea.Left + (xValue - _xMin) * _plotArea.Width / (_xMax - _xMin);
}private float ValueToPixelY(float yValue)
{// Y轴需要反转（屏幕坐标从上到下，数学坐标从下到上）return _plotArea.Bottom - (yValue - _yMin) * _plotArea.Height / (_yMax - _yMin);
}


反向转换函数：


private float PixelToValueX(float xPixel)
{return _xMin + (xPixel - _plotArea.Left) * (_xMax - _xMin) / _plotArea.Width;
}private float PixelToValueY(float yPixel)
{return _yMin + (_plotArea.Bottom - yPixel) * (_yMax - _yMin) / _plotArea.Height;
}


1.4 绘图函数
OnPaint() 主绘图函数：


protected override void OnPaint(PaintEventArgs e)
{base.OnPaint(e);Graphics g = e.Graphics;g.SmoothingMode = SmoothingMode.AntiAlias; // 抗锯齿// 计算绘图区域（扣除边距）_plotArea = new RectangleF(_chartMargin.Left,_chartMargin.Top,this.Width - _chartMargin.Horizontal,  // Width - (Left + Right)this.Height - _chartMargin.Vertical    // Height - (Top + Bottom));// 分层绘制DrawBackground(g);     // 1. 背景DrawGrid(g);          // 2. 网格DrawAxes(g);          // 3. 坐标轴DrawDataSeries(g);    // 4. 数据线DrawLegend(g);        // 5. 图例
}


DrawGrid() 网格绘制函数：


private void DrawGrid(Graphics g)
{using (Pen gridPen = new Pen(_gridColor, 1)){gridPen.DashStyle = DashStyle.Dot; // 虚线网格// X轴网格线float xStep = (_xMax - _xMin) / _xGridCount;for (int i = 0; i <= _xGridCount; i++){float xValue = _xMin + i * xStep;float xPixel = ValueToPixelX(xValue);g.DrawLine(gridPen, xPixel, _plotArea.Top, xPixel, _plotArea.Bottom);}// Y轴网格线float yStep = (_yMax - _yMin) / _yGridCount;for (int i = 0; i <= _yGridCount; i++){float yValue = _yMin + i * yStep;float yPixel = ValueToPixelY(yValue);g.DrawLine(gridPen, _plotArea.Left, yPixel, _plotArea.Right, yPixel);}}
}


DrawAxes() 坐标轴绘制函数：


private void DrawAxes(Graphics g)
{using (Pen axisPen = new Pen(_axisColor, 2)) // 坐标轴更粗using (SolidBrush textBrush = new SolidBrush(_axisColor)){// 绘制X轴和Y轴g.DrawLine(axisPen, _plotArea.Left, _plotArea.Bottom, _plotArea.Right, _plotArea.Bottom);g.DrawLine(axisPen, _plotArea.Left, _plotArea.Top, _plotArea.Left, _plotArea.Bottom);// X轴刻度标签float xStep = (_xMax - _xMin) / _xGridCount;for (int i = 0; i <= _xGridCount; i++){float xValue = _xMin + i * xStep;float xPixel = ValueToPixelX(xValue);// 刻度线g.DrawLine(axisPen, xPixel, _plotArea.Bottom, xPixel, _plotArea.Bottom + 5);// 标签文本（居中对齐）string label = xValue.ToString("F1");SizeF textSize = g.MeasureString(label, _axisFont);g.DrawString(label, _axisFont, textBrush,xPixel - textSize.Width / 2, _plotArea.Bottom + 8);}// Y轴刻度标签（类似X轴逻辑）// 坐标轴标题g.DrawString("时间 (s)", this.Font, textBrush, this.Width / 2 - 30, this.Height - 20);// Y轴标题旋转90度using (StringFormat format = new StringFormat()){format.Alignment = StringAlignment.Center;g.TranslateTransform(20, this.Height / 2);  // 移动坐标系g.RotateTransform(-90);                     // 旋转g.DrawString("幅度 (V)", this.Font, textBrush, 0, 0, format);g.ResetTransform();                         // 恢复坐标系}}
}


DrawDataSeries() 数据系列绘制函数：


private void DrawDataSeries(Graphics g, int seriesIndex)
{if (_dataSeries[seriesIndex].Count < 2) // 至少需要2个点才能画线return;using (Pen dataPen = new Pen(_seriesColors[seriesIndex], 2)){List<PointF> points = new List<PointF>();// 过滤和转换数据点foreach (PointF dataPoint in _dataSeries[seriesIndex]){float xPixel = ValueToPixelX(dataPoint.X);float yPixel = ValueToPixelY(dataPoint.Y);// 只添加可见区域内的点（优化性能）if (xPixel >= _plotArea.Left && xPixel <= _plotArea.Right){points.Add(new PointF(xPixel, yPixel));}}// 使用DrawLines比多次DrawLine更高效if (points.Count >= 2){g.DrawLines(dataPen, points.ToArray());}}
}


2. Form1 类详细分析
2.1 构造函数和初始化


public Form1()
{InitializeComponent();this.Text = "实时波形图演示";this.Size = new Size(900, 700);this.StartPosition = FormStartPosition.CenterScreen;SetupControls();  // 创建界面控件SetupTimer();     // 设置定时器
}


2.2 控件设置函数
SetupControls() 函数：


private void SetupControls()
{// 创建波形图控件waveformChart = new WaveformChart();waveformChart.Location = new Point(20, 80);waveformChart.Size = new Size(840, 500);this.Controls.Add(waveformChart);// 创建控制按钮btnStart = new Button() { Text = "开始", Location = new Point(20, 20), Size = new Size(80, 30) };btnStop = new Button() { Text = "停止", Location = new Point(110, 20), Size = new Size(80, 30) };btnClear = new Button() { Text = "清空", Location = new Point(200, 20), Size = new Size(80, 30) };// 按钮事件绑定btnStart.Click += (s, e) => dataTimer.Start();btnStop.Click += (s, e) => dataTimer.Stop();btnClear.Click += (s, e) => { waveformChart.ClearData(); timeCounter = 0; };this.Controls.AddRange(new Control[] { btnStart, btnStop, btnClear });AddAxisControls(); // 添加坐标轴控制// ... 状态标签等
}


AddAxisControls() 函数：


private void AddAxisControls()
{int yPos = 20;int xPos = 300;// X轴范围控件this.Controls.Add(new Label() { Text = "X轴:", Location = new Point(xPos, yPos + 5) });nudXMin = new NumericUpDown() { Location = new Point(xPos + 40, yPos), Size = new Size(60, 20) };nudXMin.Minimum = -1000m; nudXMin.Maximum = 1000m; nudXMin.Value = -10m;nudXMax = new NumericUpDown() { Location = new Point(xPos + 110, yPos), Size = new Size(60, 20) };nudXMax.Minimum = -1000m; nudXMax.Maximum = 1000m; nudXMax.Value = 100m;// 值改变事件nudXMin.ValueChanged += UpdateAxisRange;nudXMax.ValueChanged += UpdateAxisRange;// Y轴范围控件（类似逻辑）// ...
}


UpdateAxisRange() 函数：


private void UpdateAxisRange(object sender, EventArgs e)
{// 同步更新波形图的坐标轴范围waveformChart.XMin = (float)nudXMin.Value;waveformChart.XMax = (float)nudXMax.Value;waveformChart.YMin = (float)nudYMin.Value;waveformChart.YMax = (float)nudYMax.Value;
}


2.3 定时器相关函数
SetupTimer() 函数：


private void SetupTimer()
{dataTimer = new System.Timers.Timer(100); // 100ms间隔 = 10Hz更新频率dataTimer.Elapsed += OnTimerElapsed;dataTimer.SynchronizingObject = this; // 关键：确保在UI线程执行
}
OnTimerElapsed() 核心数据生成函数：csharp
private void OnTimerElapsed(object sender, ElapsedEventArgs e)
{// 时间计数器递增timeCounter += 0.1f;// 系列1: 标准正弦波 + 噪声float y1 = (float)(Math.Sin(timeCounter) * 1.0 + random.NextDouble() * 0.2 - 0.1);waveformChart.AddDataPoint(0, timeCounter, y1);// 系列2: 频率减半的余弦波 + 噪声float y2 = (float)(Math.Cos(timeCounter * 0.5) * 0.8 + random.NextDouble() * 0.15 - 0.075);waveformChart.AddDataPoint(1, timeCounter, y2);// 系列3: 方波（基于正弦波符号） + 更大噪声float y3 = (float)((Math.Sin(timeCounter * 2) > 0 ? 0.5 : -0.5) + random.NextDouble() * 0.3 - 0.15);waveformChart.AddDataPoint(2, timeCounter, y3);// 更新状态显示lblStatus.Text = $"状态: 运行中 - 时间: {timeCounter:F1}s";
}


3. 关键技术和设计模式
3.1 性能优化技术
双缓冲：DoubleBuffered = true 防止闪烁

数据量控制：限制为500个数据点

局部绘制：只绘制可见区域内的点

批量绘图：使用DrawLines而非多次DrawLine

3.2 线程安全
SynchronizingObject = this 确保定时器回调在UI线程执行

避免跨线程访问UI控件的问题

二、所有源码

WaveformChart .cs文件源码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;namespace _3_wave
{class WaveformChart : Control{#region 属性和字段// 数据系列private List<List<PointF>> _dataSeries;private Color[] _seriesColors = { Color.Red, Color.Green, Color.Blue };private string[] _seriesNames = { "系列1", "系列2", "系列3" };// 坐标轴设置private float _xMin = 0;private float _xMax = 100;private float _yMin = -1;private float _yMax = 1;// 外观设置private Color _backgroundColor = Color.Black;private Color _gridColor = Color.FromArgb(50, 100, 100, 100);private Color _axisColor = Color.White;private Font _axisFont = new Font("Arial", 8);// 网格设置private int _xGridCount = 10;private int _yGridCount = 8;// 边距private Padding _chartMargin = new Padding(60, 40, 20, 40);// 绘图区域private RectangleF _plotArea;#endregion#region 属性公开接口public float XMin{get => _xMin;set { _xMin = value; Invalidate(); }}public float XMax{get => _xMax;set { _xMax = value; Invalidate(); }}public float YMin{get => _yMin;set { _yMin = value; Invalidate(); }}public float YMax{get => _yMax;set { _yMax = value; Invalidate(); }}public Color[] SeriesColors{get => _seriesColors;set { _seriesColors = value; Invalidate(); }}public string[] SeriesNames{get => _seriesNames;set { _seriesNames = value; Invalidate(); }}#endregion#region 构造函数public WaveformChart(){// 初始化数据系列_dataSeries = new List<List<PointF>>();for (int i = 0; i < 3; i++){_dataSeries.Add(new List<PointF>());}// 控件设置this.DoubleBuffered = true;this.BackColor = _backgroundColor;this.Size = new Size(600, 400);// 初始化测试数据InitializeTestData();}private void InitializeTestData(){// 为每个系列添加一些初始数据Random rand = new Random();for (int series = 0; series < 3; series++){for (int i = 0; i < 100; i++){float x = i;float y = (float)(Math.Sin(i * 0.1 + series * 2) * 0.8 + rand.NextDouble() * 0.2 - 0.1);_dataSeries[series].Add(new PointF(x, y));}}}#endregion#region 数据操作public void AddDataPoint(int seriesIndex, float x, float y){if (seriesIndex < 0 || seriesIndex >= _dataSeries.Count)return;_dataSeries[seriesIndex].Add(new PointF(x, y));// 限制数据点数量，避免内存过度增长if (_dataSeries[seriesIndex].Count > 500){_dataSeries[seriesIndex].RemoveAt(0);}// 自动调整X轴范围if (x > _xMax){_xMax = x + 10;}Invalidate();}public void AddDataPoints(int seriesIndex, IEnumerable<PointF> points){if (seriesIndex < 0 || seriesIndex >= _dataSeries.Count)return;_dataSeries[seriesIndex].AddRange(points);Invalidate();}public void ClearData(int seriesIndex = -1){if (seriesIndex == -1){foreach (var series in _dataSeries){series.Clear();}}else if (seriesIndex >= 0 && seriesIndex < _dataSeries.Count){_dataSeries[seriesIndex].Clear();}Invalidate();}#endregion#region 绘图方法protected override void OnPaint(PaintEventArgs e){base.OnPaint(e);Graphics g = e.Graphics;g.SmoothingMode = SmoothingMode.AntiAlias;// 计算绘图区域_plotArea = new RectangleF(_chartMargin.Left,_chartMargin.Top,this.Width - _chartMargin.Horizontal,this.Height - _chartMargin.Vertical);// 绘制背景和网格DrawBackground(g);DrawGrid(g);DrawAxes(g);// 绘制数据系列for (int i = 0; i < _dataSeries.Count; i++){DrawDataSeries(g, i);}// 绘制图例DrawLegend(g);}private void DrawBackground(Graphics g){using (SolidBrush brush = new SolidBrush(_backgroundColor)){g.FillRectangle(brush, this.ClientRectangle);}}private void DrawGrid(Graphics g){using (Pen gridPen = new Pen(_gridColor, 1)){gridPen.DashStyle = DashStyle.Dot;// 绘制垂直网格线float xStep = (_xMax - _xMin) / _xGridCount;for (int i = 0; i <= _xGridCount; i++){float xValue = _xMin + i * xStep;float xPixel = ValueToPixelX(xValue);g.DrawLine(gridPen, xPixel, _plotArea.Top, xPixel, _plotArea.Bottom);}// 绘制水平网格线float yStep = (_yMax - _yMin) / _yGridCount;for (int i = 0; i <= _yGridCount; i++){float yValue = _yMin + i * yStep;float yPixel = ValueToPixelY(yValue);g.DrawLine(gridPen, _plotArea.Left, yPixel, _plotArea.Right, yPixel);}}}private void DrawAxes(Graphics g){using (Pen axisPen = new Pen(_axisColor, 2))using (SolidBrush textBrush = new SolidBrush(_axisColor)){// 绘制坐标轴g.DrawLine(axisPen, _plotArea.Left, _plotArea.Bottom, _plotArea.Right, _plotArea.Bottom); // X轴g.DrawLine(axisPen, _plotArea.Left, _plotArea.Top, _plotArea.Left, _plotArea.Bottom);   // Y轴// 绘制X轴刻度标签float xStep = (_xMax - _xMin) / _xGridCount;for (int i = 0; i <= _xGridCount; i++){float xValue = _xMin + i * xStep;float xPixel = ValueToPixelX(xValue);// 绘制刻度线g.DrawLine(axisPen, xPixel, _plotArea.Bottom, xPixel, _plotArea.Bottom + 5);// 绘制标签string label = xValue.ToString("F1");SizeF textSize = g.MeasureString(label, _axisFont);g.DrawString(label, _axisFont, textBrush,xPixel - textSize.Width / 2, _plotArea.Bottom + 8);}// 绘制Y轴刻度标签float yStep = (_yMax - _yMin) / _yGridCount;for (int i = 0; i <= _yGridCount; i++){float yValue = _yMin + i * yStep;float yPixel = ValueToPixelY(yValue);// 绘制刻度线g.DrawLine(axisPen, _plotArea.Left - 5, yPixel, _plotArea.Left, yPixel);// 绘制标签string label = yValue.ToString("F1");SizeF textSize = g.MeasureString(label, _axisFont);g.DrawString(label, _axisFont, textBrush,_plotArea.Left - textSize.Width - 5, yPixel - textSize.Height / 2);}// 绘制坐标轴标题g.DrawString("时间 (s)", this.Font, textBrush,this.Width / 2 - 30, this.Height - 20);using (StringFormat format = new StringFormat()){format.Alignment = StringAlignment.Center;g.TranslateTransform(20, this.Height / 2);g.RotateTransform(-90);g.DrawString("幅度 (V)", this.Font, textBrush, 0, 0, format);g.ResetTransform();}}}private void DrawDataSeries(Graphics g, int seriesIndex){if (_dataSeries[seriesIndex].Count < 2)return;using (Pen dataPen = new Pen(_seriesColors[seriesIndex], 2)){List<PointF> points = new List<PointF>();foreach (PointF dataPoint in _dataSeries[seriesIndex]){float xPixel = ValueToPixelX(dataPoint.X);float yPixel = ValueToPixelY(dataPoint.Y);// 只添加在可见区域内的点if (xPixel >= _plotArea.Left && xPixel <= _plotArea.Right){points.Add(new PointF(xPixel, yPixel));}}if (points.Count >= 2){g.DrawLines(dataPen, points.ToArray());}}}private void DrawLegend(Graphics g){using (SolidBrush textBrush = new SolidBrush(_axisColor)){float legendX = _plotArea.Right + 10;float legendY = _plotArea.Top;for (int i = 0; i < _seriesColors.Length; i++){using (SolidBrush colorBrush = new SolidBrush(_seriesColors[i])){g.FillRectangle(colorBrush, legendX, legendY + i * 20, 15, 10);}g.DrawString(_seriesNames[i], _axisFont, textBrush, legendX + 20, legendY + i * 20);}}}#endregion#region 坐标转换private float ValueToPixelX(float xValue){return _plotArea.Left + (xValue - _xMin) * _plotArea.Width / (_xMax - _xMin);}private float ValueToPixelY(float yValue){return _plotArea.Bottom - (yValue - _yMin) * _plotArea.Height / (_yMax - _yMin);}private float PixelToValueX(float xPixel){return _xMin + (xPixel - _plotArea.Left) * (_xMax - _xMin) / _plotArea.Width;}private float PixelToValueY(float yPixel){return _yMin + (_plotArea.Bottom - yPixel) * (_yMax - _yMin) / _plotArea.Height;}#endregionprotected override void OnResize(EventArgs e){base.OnResize(e);Invalidate();}}
}

Form1.cs文件源码

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;
using System.Drawing;
using System.Timers;
using System.Windows.Forms;namespace _3_wave
{public partial class Form1 : Form{private WaveformChart waveformChart;private System.Timers.Timer dataTimer;private Random random;private float timeCounter = 0;// 控件private Button btnStart, btnStop, btnClear;private NumericUpDown nudXMin, nudXMax, nudYMin, nudYMax;private Label lblStatus;public Form1(){InitializeComponent();this.Text = "实时波形图演示";this.Size = new Size(900, 700);this.StartPosition = FormStartPosition.CenterScreen;this.BackColor = Color.White;SetupControls();SetupTimer();}private void SetupControls(){// 创建波形图控件waveformChart = new WaveformChart();waveformChart.Location = new Point(20, 80);waveformChart.Size = new Size(840, 500);this.Controls.Add(waveformChart);// 创建控制按钮btnStart = new Button() { Text = "开始", Location = new Point(20, 20), Size = new Size(80, 30) };btnStop = new Button() { Text = "停止", Location = new Point(110, 20), Size = new Size(80, 30) };btnClear = new Button() { Text = "清空", Location = new Point(200, 20), Size = new Size(80, 30) };btnStart.Click += (s, e) => dataTimer.Start();btnStop.Click += (s, e) => dataTimer.Stop();btnClear.Click += (s, e) => { waveformChart.ClearData(); timeCounter = 0; };this.Controls.AddRange(new Control[] { btnStart, btnStop, btnClear });// 创建坐标轴范围设置AddAxisControls();// 状态标签lblStatus = new Label(){Text = "状态: 已停止",Location = new Point(500, 25),Size = new Size(200, 20),ForeColor = Color.Blue};this.Controls.Add(lblStatus);random = new Random();}private void AddAxisControls(){int yPos = 20;int xPos = 300;// X轴范围this.Controls.Add(new Label() { Text = "X轴:", Location = new Point(xPos, yPos + 5), AutoSize = true });nudXMin = new NumericUpDown(){Location = new Point(xPos + 40, yPos),Size = new Size(60, 20)};// 先设置范围，再设置值nudXMin.Minimum = -1000m;nudXMin.Maximum = 1000m;nudXMin.Value = -10m;  // 现在这个值在范围内nudXMax = new NumericUpDown(){Location = new Point(xPos + 110, yPos),Size = new Size(60, 20)};nudXMax.Minimum = -1000m;nudXMax.Maximum = 1000m;nudXMax.Value = 100m;nudXMin.ValueChanged += UpdateAxisRange;nudXMax.ValueChanged += UpdateAxisRange;// Y轴范围this.Controls.Add(new Label() { Text = "Y轴:", Location = new Point(xPos + 190, yPos + 5), AutoSize = true });nudYMin = new NumericUpDown(){Location = new Point(xPos + 230, yPos),Size = new Size(60, 20),DecimalPlaces = 1};nudYMin.Minimum = -100m;nudYMin.Maximum = 100m;nudYMin.Value = -1.5m;nudYMax = new NumericUpDown(){Location = new Point(xPos + 300, yPos),Size = new Size(60, 20),DecimalPlaces = 1};nudYMax.Minimum = -100m;nudYMax.Maximum = 100m;nudYMax.Value = 1.5m;nudYMin.ValueChanged += UpdateAxisRange;nudYMax.ValueChanged += UpdateAxisRange;this.Controls.AddRange(new Control[] { nudXMin, nudXMax, nudYMin, nudYMax });}private void UpdateAxisRange(object sender, EventArgs e){waveformChart.XMin = (float)nudXMin.Value;waveformChart.XMax = (float)nudXMax.Value;waveformChart.YMin = (float)nudYMin.Value;waveformChart.YMax = (float)nudYMax.Value;}private void SetupTimer(){dataTimer = new System.Timers.Timer(100); // 100ms间隔dataTimer.Elapsed += OnTimerElapsed;dataTimer.SynchronizingObject = this; // 确保在UI线程执行}private void OnTimerElapsed(object sender, ElapsedEventArgs e){// 生成测试数据：三条不同的波形timeCounter += 0.1f;// 系列1: 正弦波float y1 = (float)(Math.Sin(timeCounter) * 1.0 + random.NextDouble() * 0.2 - 0.1);waveformChart.AddDataPoint(0, timeCounter, y1);// 系列2: 余弦波float y2 = (float)(Math.Cos(timeCounter * 0.5) * 0.8 + random.NextDouble() * 0.15 - 0.075);waveformChart.AddDataPoint(1, timeCounter, y2);// 系列3: 方波 + 噪声float y3 = (float)((Math.Sin(timeCounter * 2) > 0 ? 0.5 : -0.5) + random.NextDouble() * 0.3 - 0.15);waveformChart.AddDataPoint(2, timeCounter, y3);// 更新状态lblStatus.Text = $"状态: 运行中 - 时间: {timeCounter:F1}s";}protected override void OnFormClosing(FormClosingEventArgs e){dataTimer?.Stop();dataTimer?.Dispose();base.OnFormClosing(e);}}
}

三、效果演示

设置x轴，y轴，清空后开始，波形图开始刷新。

http://www.dtcms.com/a/410247.html

相关文章：

  • javaweb3【ServletContext知识】
  • Java 复制 PowerPoint 幻灯片：高效实现演示文稿内容复用
  • ⸢ 陆 ⸥ ⤳ 可信纵深防御：整体架构
  • 医疗数据ETL开发流程总结
  • 网站制作多久能完成泰州做网站需要多少钱
  • 【汽车篇】AI深度学习在汽车零部件外观检测——铝铸件中的应用
  • Unity 虚拟仿真实验中设计模式的使用 ——工厂模式（Factory Pattern）
  • 网站备案初审过了企业信息门户网站建设方案
  • 【力扣LeetCode】231_2的幂（法1：循环迭代，法2：位运算）
  • 【便宜整数正分解】2022-11-23
  • hive连不上，报错9000拒绝连接
  • 力扣hot100 | 多维动态规划 | 62. 不同路径、64. 最小路径和、5. 最长回文子串、1143. 最长公共子序列、72. 编辑距离
  • 构建生产级多模态数据集：视觉与视频模型（参照LLaVA-OneVision-Data和VideoChat2）
  • 《策略模式在电商系统中的优雅应用：重构你的折扣计算逻辑》
  • 网站界面设计内容做外贸网站哪里好
  • ValueError: Expecting value: line 1 column 1 (char 0)
  • Agent的九种设计模式
  • 系统性学习C++-第二讲-类和对象（上）
  • LSM-Tree数据结构和数据库
  • 理解Modbus地址：设备手册地址 (40001) vs. 协议地址 (0)
  • 自己做电商网站网站建设 万网
  • Linux系统编程：线程概念
  • 【pycharm---pytorch】pycharm配置以及pytorch学习
  • 学做网站培训 上海南昌网站页面优化
  • 《C++ Primer Plus》读书笔记 第二章 开始学习C++
  • 【精】C# 精确判断XML是否存在子节点
  • 从零开始学神经网络——GRU（门控循环单元）
  • XML中的 CDATA mybaitis xml中的 ＜![CDATA[ xxxx ]]＞
  • iOS 26 系统流畅度剖析：Liquid Glass 动画表现 + 用户反馈
  • JavaScript学习笔记(十四)：ES6 Set函数详解