Question

我想显示来自串口的数据图。这个数据继续在\ r之间。对于绘图图，我使用的是ZedGraph.dll。我的代码如下

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 ZedGraph;
using System.IO.Ports;
namespace FilterRealTimeCSharp
{
    public partial class Form1 : Form
    {
        List<double> measures;
        /// The ZedGraph curve
        LineItem myCurve;
        BackgroundWorker worker;
      //  ZedGraphControl zedGraphControl1;
        GraphPane myPane;
        public Form1()
        {
            InitializeComponent();
            //create an empty list
            measures = new List<double>();

            myPane = zedGraphControl2.GraphPane;
            //init your zegGraphControl here
            //create an empty curve: it will be filled later
            myCurve = myPane.AddCurve("Porsche", null, Color.Red, SymbolType.Diamond);
            //create the worker
            worker = new BackgroundWorker();
            // set this to true so that you can cancel the worker
            worker.WorkerSupportsCancellation = true;
            worker.DoWork += worker_DoWork;
            worker.RunWorkerCompleted += worker_RunWorkerCompleted;
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }
        private void worker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
        {
            //the worker has completed
            //do whatever you want here

        }
        private void worker_DoWork(object sender, DoWorkEventArgs e)
        {
            //put all your serial port code here
            SerialPort sprt = new SerialPort("COM1");
            sprt.BaudRate = 9600;
            sprt.Parity = Parity.None;
            sprt.StopBits = StopBits.One;
            sprt.DataBits = 8;
            sprt.Handshake = Handshake.None;
            try
            {
                sprt.Open();
            }
            catch (Exception)
            {
                MessageBox.Show("Check port");
                return;
            }
            //worker.CancellationPending will change to true when CancelAsync is called
            //(so when the user clicks button2).
            //while the worker should still continue, read incoming data
            while (!worker.CancellationPending)
            {
                //wait for data to come...
                System.Threading.Thread.Sleep(100);
                string indata = sprt.ReadExisting();
                //extract the values from the read data
                //be careful here: make sure the read data is complete...
                string[] splt = indata.Split('\r');
               // string chop = splt[2];
               //// string final = chop.Remove(5);
               // float d = Convert.ToSingle(chop);
                //update the measures
                //measures is shared by several threads: you must lock it to access it safely

                lock (measures)
                {
                    for (int i = 1; i < splt.Length-2; i++)
                    {
                        string chop = splt[i];
                        // string final = chop.Remove(5);
                        float d = Convert.ToSingle(chop);
                        measures.Add(d);
                    }
                }
                //update the graph
                BeginInvoke((Action)(() => UpdateGraph()));
            }
            //user wants to stop the worker
            sprt.Close();
        }
        /// This function is called when the graph should be updated
        private void UpdateGraph()
        {
            //messures is shared by several threads: you must lock it to access it safely
            lock (measures)
            {
                //add each measure into the curve
                for (int i = 0; i < measures.Count; i++)
                {
                    //fill each with what ever you want
                    double x = myCurve.Points.Count;
                    double y = measures[i];
                    //add a new point to the curve
                    myCurve.AddPoint(x, y);
                }
                //all measures have been added
                //we can empty the list
                measures.Clear();
            }
            //the curve has been updated so refresh the graph
            zedGraphControl2.AxisChange();
            zedGraphControl2.Invalidate();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            worker.RunWorkerAsync();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            worker.CancelAsync();
        }
    }
}

但它没有显示连续图。我不知道我的代码中的问题在哪里。请帮我解决这个问题。

任何帮助将不胜感激。

Answer 1

为什么不尝试RollingPointPairList而不是列表......？

有Real Time Plot使用ZedGraph的例子，祝你好运.. :)

Answer 2

每次绘制曲线时，您可能正在清除度量列表。每一次，ZedGraph都会绘制一个点并删除曲线的其余部分。可能？

显示串口数据的实时图

2 个答案: