C# ZedGraph实时多条曲线数据更新实例

C# ZedGraph实时多条曲线数据更新实例

先看展示效果

1.创建曲线实例添加必要的元素

 public class LineChannel
     {
         public LineChannel(int id,int number,string name,string type,bool selected,Color lineColor,int lineWidth)
         {
             this.id = id;
             this.number = number;
             this.name = name;
             this.type = type;
             this.selected = selected;
             this.lineColor = lineColor;
             this.lineWidth = lineWidth;
         }

         private int id;
         private int number;
         private string name;
         private string type;
         private bool selected;
         private Color lineColor;
         private int lineWidth;

         public int ID
         {
             get { return this.id; }
             //set { this.id = value; }
         }

         public int Number
         {
             get { return this.number; }
         }

         public string Name
         {
             get { return this.name; }
             //set { this.name = value; }
         }

         public string Type
         {
             get { return this.type; }
             //set { this.type = value; }
         }
         public bool Selected
         {
             get { return this.selected; }
             set { this.selected = value; }
         }
         public Color LineColor
         {
             get { return this.lineColor; }
             set { this.lineColor = value; }
         }
         public int LineWidth
         {
             get { return this.lineWidth; }
             set { this.lineWidth = value; }
         }

     }

2.初始化控件增加曲线

全局曲线和其实时间保存

   private List<LineChannel> lines;   //所有的曲线
   private int tickStart = ;     // 起始时间以毫秒为单位

初始化曲线

   //加载创建曲线数据
             LineChannel lineChannel1 = new LineChannel(, , "曲线 1", "温度", true, Color.Red, );
             LineChannel lineChannel2 = new LineChannel(, , "曲线 2", "温度", true, Color.Green, );
             LineChannel lineChannel3 = new LineChannel(, , "曲线 3", "温度", true, Color.Gray, );
             LineChannel lineChannel4 = new LineChannel(, , "曲线 4", "温度", true, Color.Black, );

             this.lines.Add(lineChannel1);
             this.lines.Add(lineChannel2);
             this.lines.Add(lineChannel3);
             this.lines.Add(lineChannel4);

             //获取引用
             GraphPane myPane = zedGraphControl1.GraphPane;
             //设置标题
             myPane.Title.Text = "实时曲线";
             //设置X轴说明文字
             myPane.XAxis.Title.Text = "时间";
             //设置Y轴说明文字
             myPane.YAxis.Title.Text = "温度";

             //添加曲线
             foreach (LineChannel channel in this.lines)
             {
                 RollingPointPairList list = new RollingPointPairList();
                 LineItem curve = myPane.AddCurve(channel.Name, list, channel.LineColor, SymbolType.None);
             }

             int increment = ;//单位s

             myPane.XAxis.Scale.Min = ; //X轴最小值0
             myPane.XAxis.Scale.Max = ; //X轴最大30
             myPane.XAxis.Scale.MinorStep = ;//X轴小步长1,也就是小间隔
             myPane.XAxis.Scale.MajorStep = ;//X轴大步长为5，也就是显示文字的大间隔

             //改变轴的刻度
             zedGraphControl1.AxisChange();
             this.zedGraphControl1.Invalidate();
             this.dataGridViewLines.DataSource = this.lines;
             this.dataGridViewLines.ClearSelection();

3.增加线程处理 模拟数据

   //保存开始时间
             tickStart = Environment.TickCount;
             stop = false;
             BackgroundWorker worker = sender as BackgroundWorker;

             isSampling = true;
             List<LineChannel> channels = this.lines;
             //DoWork
             LineData lineData;
             while (isSampling)
             {
                 lineData = new LineData();

                 //获取数据
                 double time = (Environment.TickCount - tickStart) / 1000.0;
                 double data = Math.Sin(2.0 * Math.PI * time / 3.0);
                 double data2 = data - 0.4;
                 double data3 = data - 0.8;
                 double data4 = data - 1.2;

                 //添加数据
                 lineData.Add(channels[], time, data);
                 lineData.Add(channels[], time, data2);
                 lineData.Add(channels[], time, data3);
                 lineData.Add(channels[], time, data4);

                 //上报数据处理
                 worker.ReportProgress(, lineData);

                 Thread.Sleep();
             }

4.数据接受更新曲线

//接收上报的数据LineData 数据处理如下
 1 LineData lineData = e.Data;

             double time = , data = ;

             foreach (LineChannel channel in lineData.Channels)
             {
                 if (e.Data.GetData(channel, out time, out data))
                 {
                     LineItem curve = null;

                     foreach (var item in zedGraphControl1.GraphPane.CurveList)
                     {
                         if (item.Label.Text == channel.Name)
                             curve = item as LineItem;
                     }

                     if (curve != null)
                     {
                         IPointListEdit list = curve.Points as IPointListEdit;
                         list.Add(time, data);
                     }

                     curve.IsVisible = channel.Selected;
                     curve.Line.Width = channel.LineWidth;
                     curve.Line.Color = channel.LineColor;

                 }

             }

             Scale xScale = zedGraphControl1.GraphPane.XAxis.Scale;
             if (time > xScale.Max - xScale.MajorStep)
             {
                 xScale.Max = time + xScale.MajorStep;
                 xScale.Min = xScale.Max - 30.0;
             }

             //if (time > xScale.Max)
             //{
             //    xScale.Max = time;
             //    xScale.Min = xScale.Max - 30;
             //}

             //第三步:调用ZedGraphControl.AxisChange()方法更新X和Y轴的范围
             zedGraphControl1.AxisChange();

             //第四步:调用Form.Invalidate()方法更新图表
             zedGraphControl1.Invalidate();

程序运行效果

初始化曲线

更换曲线颜色

开始采集

程序源代码工程下载

实现了比较基础简单的功能，提供思路，遇到bug不要惊讶，没有细调，需要源代码可以留言，给出邮箱，看到后会回复。

本程序参考

https://www.cnblogs.com/chuhj/p/7988404.html