C# 绘制曲线的ScottPlot.NET

 

ScottPlot 是一个免费的开源 .NET 绘图库，可以轻松交互式地显示大型数据集。折线图、条形图、饼图、散点图等只需几行代码即可创建。

ScottPlot - .NET 的交互式绘图库

ScottPlot 4.1 Demo   官方的demo是最好的学习例程

 解压后的文件清单如下，

 双击 ScottPlot.Demo.WinForms.exe，查看不同demo的效果

查找demo对应的源代码点击如下的连接到ScottPlot 官网

 再点击Github  跳转至 GitHub - ScottPlot/ScottPlot: Interactive plotting library for .NET

 例如我要查找 DataLogger的源码

 

 在Visual Studio 2017中利用Nuget包管理下载ScottPlot,如下图

在使用ScottPlot.NET之前需要了解VS基本的配置需求，不同版本的ScottPlot所需的.NET framework版本也不一样

 如上图我准备使用V4最高版本V4.174,根据依赖需求，我准备切换.NETFramework4.7.2，如何从.NETFramework4切换

到.NETFramework4.7.2，这里报错是因为缺少app.config的配置信息。

添加如下内容到app.config文件中

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <startup> 
        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.7.2" />
    </startup>
</configuration>

 

 参考demo的源码移植到自己的程序里

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;


namespace CMXM
{
    public partial class Debug : Form
    {

        readonly System.Windows.Forms.Timer AddNewDataTimer = new Timer() { Interval = 10, Enabled = true };
        readonly System.Windows.Forms.Timer UpdatePlotTimer = new Timer() { Interval = 50, Enabled = true };

        readonly ScottPlot.Plottable.DataLogger Logger;

        readonly Random Rand = new Random();

        double LastPointValue = 0;


        public Debug()
        {
            InitializeComponent();

            Logger = formsPlot1.Plot.AddDataLogger(label: "trace");

            AddRandomWalkData(1000);
            btnFull_Click(null, EventArgs.Empty);
            cbView_CheckedChanged(null, EventArgs.Empty);

            AddNewDataTimer.Tick += (s, e) => AddRandomWalkData(10);
            UpdatePlotTimer.Tick += UpdatePlotTimer_Tick;
        }

        private void AddRandomWalkData(int count)
        {
            for (int i = 0; i < count; i++)
            {
                LastPointValue = LastPointValue + Rand.NextDouble() - .5;
                Logger.Add(Logger.Count, LastPointValue);
            }
        }

        private void UpdatePlotTimer_Tick(object sender, EventArgs e)
        {
            if (Logger.Count == Logger.CountOnLastRender)
                return;

            formsPlot1.Refresh();

            this.metroTextBoxInfo.Text = $"DataLogger Demo ({Logger.Count:N0} points)";
        }

        private void cbView_CheckedChanged(object sender, EventArgs e)
        {
            Logger.ManageAxisLimits = cbEnableViewManagement.Checked;

            // disable mouse interaction if axis limits are managed automatically
            formsPlot1.Configuration.Pan = !cbEnableViewManagement.Checked;
            formsPlot1.Configuration.Zoom = !cbEnableViewManagement.Checked;
        }

        private void btnFull_Click(object sender, EventArgs e)
        {
            Logger.ViewFull();
            formsPlot1.Plot.Title("Full");
            formsPlot1.Refresh();
        }

        private void btnJump_Click(object sender, EventArgs e)
        {
            Logger.ViewJump();
            formsPlot1.Plot.Title("Jump");
            formsPlot1.Refresh();
        }

        private void btnSlide_Click(object sender, EventArgs e)
        {
            Logger.ViewSlide();
            formsPlot1.Plot.Title("Slide");
            formsPlot1.Refresh();
        }

        private void btnClear_Click(object sender, EventArgs e)
        {
            Logger.Clear();
            formsPlot1.Refresh();
        }

        private void chk_showLegend_CheckedChanged(object sender, EventArgs e)
        {
            formsPlot1.Plot.Legend(chk_showLegend.Checked);
            formsPlot1.Refresh();
        }
    }
}

运行效果