前端代码
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;
private double xGrap = 20;//x坐标的间隔
private int xPagePoint = 20;//每一页要显示多少个数据点
Random rd = new Random();
private DispatcherTimer dispatcherTimer = new DispatcherTimer();
public MainWindow()
{
InitializeComponent();
}
private void Button_Click(object sender, RoutedEventArgs e)
{
dispatcherTimer.Interval = TimeSpan.FromMilliseconds(100);//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 * xGrap;
double y = rd.Next(1,200);
var point = new Point(x, y);
_myPolyline.Points.Add(point);//添加新的数据点
if (currentSecond > xPagePoint)
{
_myPolyline.Points.RemoveAt(0);
_myCanvas.Margin = new Thickness(-1*(xGrap * currentSecond)+ xPagePoint * xGrap, 0, 0, 0);
}
}
}
}
MainWindow.xaml的代码如下:
<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">
<Grid >
<Border Style="{StaticResource MyGridBorderStyle}" Height="409" Margin="0,0,43,0" Width="749">
<Canvas Name="_myCanvas" Margin="0,0,0,0" >
<Polyline Name="_myPolyline"
Stroke="Red"
StrokeThickness="1" />
</Canvas>
</Border>
<Button Content="开始" Click="Button_Click" HorizontalAlignment="Right" VerticalAlignment="Top" />
</Grid>
</Window>
App.xaml的代码如下:
<Application x:Class="使用_Polyline_元素来绘制折线.App"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:使用_Polyline_元素来绘制折线"
StartupUri="MainWindow.xaml">
<Application.Resources>
<DrawingBrush x:Key="MyGridBrushResource" Viewport="0,0,10,10" ViewportUnits="Absolute" TileMode="Tile">
<DrawingBrush.Drawing>
<DrawingGroup>
<DrawingGroup.Children>
<GeometryDrawing Brush="White">
<GeometryDrawing.Geometry>
<RectangleGeometry Rect="0,0,1,1" />
</GeometryDrawing.Geometry>
</GeometryDrawing>
<GeometryDrawing Geometry="M0,0 L1,0 1,0.1, 0,0.1Z" Brush="#CCCCFF" />
<GeometryDrawing Geometry="M0,0 L0,1 0.1,1, 0.1,0Z" Brush="#CCCCFF" />
</DrawingGroup.Children>
</DrawingGroup>
</DrawingBrush.Drawing>
</DrawingBrush>
<Style x:Key="MyGridBorderStyle">
<Setter Property="Border.Background" Value="{StaticResource MyGridBrushResource}"/>
<Setter Property="Border.HorizontalAlignment" Value="Center"/>
<Setter Property="Border.VerticalAlignment" Value="Top"/>
<Setter Property="Border.BorderBrush" Value="Black"/>
<Setter Property="Border.BorderThickness" Value="1"/>
</Style>
</Application.Resources>
</Application>
其实就是利用静态资源来实现背景单元格的