（一）WPF使用 Polyline 元素动态绘制折线

 前端代码如下：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Windows.Threading;

namespace 使用_Polyline_元素来绘制折线
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        private int currentSecond = 0;
        Random rd = new Random();
        private DispatcherTimer dispatcherTimer = new DispatcherTimer();
        public MainWindow()
        {
            InitializeComponent();
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            dispatcherTimer.Interval = TimeSpan.FromSeconds(1);//1秒钟产生一次中断
            dispatcherTimer.Tick += timer_Tick;//中断入口函数
            dispatcherTimer.IsEnabled = true;//开启中断
        }

        private void timer_Tick(object sender, EventArgs e)
        {
            currentSecond++;
            double x = currentSecond * 10;//x值递增*10
            double y = rd.Next(1,200);//随机产生y值
                    
            var point = new Point(x, y);
            _myPolyline.Points.Add(point);//添加新的数据点
        }
    }
}

XAML代码如下：

<Window x:Class="使用_Polyline_元素来绘制折线.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:使用_Polyline_元素来绘制折线"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <Canvas Height="400" Width="400">
        <Polyline Name="_myPolyline"
            Stroke="Black"
            StrokeThickness="4" />
        <Button Content="开始" Canvas.Left="-190" Canvas.Top="47" Width="75" Click="Button_Click" HorizontalAlignment="Left"/>
    </Canvas>
</Window>

如果想要折线图移动起来，稍微修改一下代码即可：

https://blog.csdn.net/u011240538/article/details/85409349