zedGraph是一个开源的曲线绘制插件，由于要制作上位机显示实时数据，百度搜索到了zedgraph，优点是开源，功能也够使用。

缺点是看网址08年后就没有更新过。尝试使用了一下，感觉还可以。 曲线绘制直接看下图。

原理很简单。设置一个曲线属性，然后一直给曲线加点，就会在图上显示。网上也有很多历程。下面是一个生成两个图幅的例子

通过定时器更新曲线，在vs中使用c#实现，网上可以找到源代码。有很多类似的

public partial class Form1 : Form{public Form1(){InitializeComponent();GraphIt();GraphIt2();}private void Form1_Load(object sender, EventArgs e){}LineItem myCurve1, myCurve2, myCurve3;private void GraphIt(){MasterPane master = z1.MasterPane;master.PaneList.Clear();// Display the MasterPane Title, and set the outer margin to 10 pointsmaster.Title.IsVisible = true;master.Title.Text = "实时显示";master.Margin.All = 5;// Create some GraphPane's (normally you would add some curves tooGraphPane pane1 = new GraphPane();GraphPane pane2 = new GraphPane();GraphPane pane3 = new GraphPane();// Add all the GraphPanes to the MasterPanemaster.Add(pane1);//  master.Add(pane2);//  master.Add(pane3);pane1.XAxis.Scale.MinorStep = pane2.XAxis.Scale.MinorStep = pane3.XAxis.Scale.MinorStep = 1;pane1.XAxis.Scale.MajorStep = pane2.XAxis.Scale.MajorStep = pane3.XAxis.Scale.MajorStep = 50;PointPairList dummylist = new PointPairList();myCurve1 = pane1.AddCurve("Angle X", dummylist, Color.Red);myCurve2 = pane2.AddCurve("Angle Y", dummylist, Color.Blue);//    myCurve3 = pane3.AddCurve("Angle Z", dummylist, Color.Green);myCurve1.Line.Width = myCurve2.Line.Width = 5;// = myCurve3.Line.Width = 5;myCurve1.Symbol.Size = myCurve2.Symbol.Size = 0;// = myCurve3.Symbol.Size = 0;// Refigure the axis ranges for the GraphPanesz1.AxisChange();// Layout the GraphPanes using a default Pane Layoutusing (Graphics g = this.CreateGraphics()){master.SetLayout(g, PaneLayout.SquareRowPreferred);//优先排成一列}}Int32 Ntimer = 0;private void timer1_Tick(object sender, EventArgs e){Ntimer++;IPointListEdit list2_1 = myCurve1.Points as IPointListEdit;list2_1.Add(Ntimer, 2);IPointListEdit list2_2 = myCurve2_1.Points as IPointListEdit;list2_2.Add(Ntimer, 1);Scale xScale = z1.GraphPane.XAxis.Scale;if (Ntimer > xScale.Max - xScale.MajorStep){xScale.Max = Ntimer + xScale.MajorStep;xScale.Min = xScale.Max - 500.0;}xScale = z2.GraphPane.XAxis.Scale;if (Ntimer > xScale.Max - xScale.MajorStep){xScale.Max = Ntimer + xScale.MajorStep;xScale.Min = xScale.Max - 500.0;}z1.AxisChange();z1.Invalidate();z2.AxisChange();z2.Invalidate();}LineItem myCurve2_1, myCurve2_2, myCurve2_3;private void GraphIt2(){MasterPane master = z2.MasterPane;master.PaneList.Clear();// Display the MasterPane Title, and set the outer margin to 10 pointsmaster.Title.IsVisible = true;master.Title.Text = "实时显示";master.Margin.All = 5;// Create some GraphPane's (normally you would add some curves tooGraphPane pane1 = new GraphPane();GraphPane pane2 = new GraphPane();GraphPane pane3 = new GraphPane();// Add all the GraphPanes to the MasterPanemaster.Add(pane1);// master.Add(pane2);//  master.Add(pane3);pane1.XAxis.Scale.MinorStep = pane2.XAxis.Scale.MinorStep = pane3.XAxis.Scale.MinorStep = 1;pane1.XAxis.Scale.MajorStep = pane2.XAxis.Scale.MajorStep = pane3.XAxis.Scale.MajorStep = 50;PointPairList dummylist = new PointPairList();myCurve2_1 = pane1.AddCurve("Angle X", dummylist, Color.Red);myCurve2_2 = pane2.AddCurve("Angle Y", dummylist, Color.Blue);//    myCurve3 = pane3.AddCurve("Angle Z", dummylist, Color.Green);myCurve2_1.Line.Width = myCurve2_2.Line.Width = 5;// = myCurve3.Line.Width = 5;myCurve2_1.Symbol.Size = myCurve2_2.Symbol.Size = 0;// = myCurve3.Symbol.Size = 0;// Refigure the axis ranges for the GraphPanesz2.AxisChange();// Layout the GraphPanes using a default Pane Layoutusing (Graphics g = this.CreateGraphics()){master.SetLayout(g, PaneLayout.SquareRowPreferred);//优先排成一列}}}

博主主要想说的是。当数据量大的时候，曲线更新快会导致界面卡死的现象。这是由于更新太耗时导致的。

作为一个小白，网上搜索了大量资料，最后发现解决方式有两个1、BackgroundWorker  异步更新

2、创建新的线程  单独去更新  就可以解决了。

博主最后使用了接收can报文 10ms周期， 每周期4个报文，运行半天，没有出现异常