C# ZedGraph实时多条曲线数据更新实例

Posted 2022-04-10 jiyf

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C# ZedGraph实时多条曲线数据更新实例

先看展示效果

技术图片

1.创建曲线实例添加必要的元素

 1 public class LineChannel
 2     
 3         public LineChannel(int id,int number,string name,string type,bool selected,Color lineColor,int lineWidth)
 4         
 5             this.id = id;
 6             this.number = number;
 7             this.name = name;
 8             this.type = type;
 9             this.selected = selected;
10             this.lineColor = lineColor;
11             this.lineWidth = lineWidth;
12         
13 
14         private int id;
15         private int number;
16         private string name;
17         private string type;
18         private bool selected;
19         private Color lineColor;
20         private int lineWidth;
21 
22         
23         public int ID
24         
25             get  return this.id; 
26             //set  this.id = value; 
27         
28 
29         public int Number
30         
31             get  return this.number; 
32         
33 
34         public string Name
35         
36             get  return this.name; 
37             //set  this.name = value; 
38         
39 
40         public string Type
41         
42             get  return this.type; 
43             //set  this.type = value; 
44         
45         public bool Selected
46         
47             get  return this.selected; 
48             set  this.selected = value; 
49         
50         public Color LineColor
51         
52             get  return this.lineColor; 
53             set  this.lineColor = value; 
54         
55         public int LineWidth
56         
57             get  return this.lineWidth; 
58             set  this.lineWidth = value; 
59         
60 
61

2.初始化控件增加曲线

 1   //加载创建曲线数据
 2             LineChannel lineChannel1 = new LineChannel(1111, 1, "曲线 1", "温度", true, Color.Red, 1);
 3             LineChannel lineChannel2 = new LineChannel(2222, 2, "曲线 2", "温度", true, Color.Green, 1);
 4             LineChannel lineChannel3 = new LineChannel(3333, 3, "曲线 3", "温度", true, Color.Gray, 1);
 5             LineChannel lineChannel4 = new LineChannel(4444, 4, "曲线 4", "温度", true, Color.Black, 1);
 6 
 7             this.lines.Add(lineChannel1);
 8             this.lines.Add(lineChannel2);
 9             this.lines.Add(lineChannel3);
10             this.lines.Add(lineChannel4);
11 
12 
13             //获取引用
14             Graphpane myPane = zedGraphControl1.GraphPane;
15             //设置标题
16             myPane.Title.Text = "实时曲线";
17             //设置X轴说明文字
18             myPane.XAxis.Title.Text = "时间";
19             //设置Y轴说明文字
20             myPane.YAxis.Title.Text = "温度";
21 
22 
23             //添加曲线
24             foreach (LineChannel channel in this.lines)
25             
26                 RollingPointPairList list = new RollingPointPairList(1200);
27                 LineItem curve = myPane.AddCurve(channel.Name, list, channel.LineColor, SymbolType.None);
28             
29 
30 
31             int increment = 30;//单位s
32 
33 
34 
35 
36             myPane.XAxis.Scale.Min = 0; //X轴最小值0
37             myPane.XAxis.Scale.Max = 30; //X轴最大30
38             myPane.XAxis.Scale.MinorStep = 1;//X轴小步长1,也就是小间隔
39             myPane.XAxis.Scale.MajorStep = 5;//X轴大步长为5，也就是显示文字的大间隔
40 
41             //改变轴的刻度
42             zedGraphControl1.AxisChange();
43             this.zedGraphControl1.Invalidate();
44             this.dataGridViewLines.DataSource = this.lines;
45             this.dataGridViewLines.ClearSelection();

3.增加线程处理模拟数据

 1   //保存开始时间
 2             tickStart = Environment.TickCount;
 3             stop = false;
 4             BackgroundWorker worker = sender as BackgroundWorker;
 5 
 6             isSampling = true;
 7             List<LineChannel> channels = this.lines;
 8             //DoWork
 9             LineData lineData;
10             while (isSampling)
11             
12                 lineData = new LineData();
13 
14 
15                 //获取数据
16                 double time = (Environment.TickCount - tickStart) / 1000.0;
17                 double data = Math.Sin(2.0 * Math.PI * time / 3.0);
18                 double data2 = data - 0.4;
19                 double data3 = data - 0.8;
20                 double data4 = data - 1.2;
21 
22                 //添加数据
23                 lineData.Add(channels[0], time, data);
24                 lineData.Add(channels[1], time, data2);
25                 lineData.Add(channels[2], time, data3);
26                 lineData.Add(channels[3], time, data4);
27 
28                 //上报数据处理
29                 worker.ReportProgress(0, lineData);
30 
31                 Thread.Sleep(50);
32

4.数据接受更新曲线

 1 LineData lineData = e.Data;
 2 
 3             double time = 0, data = 0;
 4 
 5             foreach (LineChannel channel in lineData.Channels)
 6             
 7                 if (e.Data.GetData(channel, out time, out data))
 8                 
 9                     LineItem curve = null;
10 
11                     foreach (var item in zedGraphControl1.GraphPane.CurveList)
12                     
13                         if (item.Label.Text == channel.Name)
14                             curve = item as LineItem;
15                     
16 
17                     if (curve != null)
18                     
19                         IPointListEdit list = curve.Points as IPointListEdit;
20                         list.Add(time, data);
21                     
22 
23                     curve.IsVisible = channel.Selected;
24                     curve.Line.Width = channel.LineWidth;
25                     curve.Line.Color = channel.LineColor;
26 
27 
28                 
29 
30 
31             
32 
33 
34             Scale xScale = zedGraphControl1.GraphPane.XAxis.Scale;
35             if (time > xScale.Max - xScale.MajorStep)
36             
37                 xScale.Max = time + xScale.MajorStep;
38                 xScale.Min = xScale.Max - 30.0;
39             
40 
41 
42             //if (time > xScale.Max)
43             //
44             //    xScale.Max = time;
45             //    xScale.Min = xScale.Max - 30;
46             //
47 
48 
49             //第三步:调用ZedGraphControl.AxisChange()方法更新X和Y轴的范围
50             zedGraphControl1.AxisChange();
51 
52             //第四步:调用Form.Invalidate()方法更新图表
53             zedGraphControl1.Invalidate();