（四）WPF使用 Polyline 元素动态绘制折线（添加X轴时间标签）

前端代码MainWindow.xaml.cs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;
private double xGrap = 100;//x坐标的间隔
private int xPagePoint = 5;//每一页要显示多少个数据点
Random rd = new Random();
private DispatcherTimer dispatcherTimer = new DispatcherTimer();

//TextBlock[] myTextBlock = new TextBlock[5];//创建5个X轴的文本
TextBlock myTextBlock1 = new TextBlock();
TextBlock myTextBlock2 = new TextBlock();
TextBlock myTextBlock3 = new TextBlock();
TextBlock myTextBlock4= new TextBlock();
TextBlock myTextBlock5 = new TextBlock();
public MainWindow()
{
InitializeComponent();
}

private void Button_Click(object sender, RoutedEventArgs e)
{
dispatcherTimer.Interval = TimeSpan.FromMilliseconds(1000);//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

//myTextBlock.FontSize = 18;
//myTextBlock.FontWeight = FontWeights.Bold;
//myTextBlock.FontStyle = FontStyles.Italic;

//myTextBlock1.Text = "0";
//myTextBlock2.Text = "0";
//myTextBlock3.Text = "0";
//myTextBlock4.Text = "0";
//myTextBlock5.Text = "0";
myTextBlock1.Margin = new Thickness(10 + xGrap*1 - 20, 220, 0, 0);
myTextBlock2.Margin = new Thickness(10 + xGrap*2 - 20, 220, 0, 0);
myTextBlock3.Margin = new Thickness(10 + xGrap*3 - 20, 220, 0, 0);
myTextBlock4.Margin = new Thickness(10 + xGrap*4 - 20, 220, 0, 0);
myTextBlock5.Margin = new Thickness(10 + xGrap*5 - 20, 220, 0, 0);
_myGrid.Children.Add(myTextBlock1);
_myGrid.Children.Add(myTextBlock2);
_myGrid.Children.Add(myTextBlock3);
_myGrid.Children.Add(myTextBlock4);
_myGrid.Children.Add(myTextBlock5);
}

private void timer_Tick(object sender, EventArgs e)
{
DateTime _cur_date = DateTime.Now; ;
DateTime date1;
currentSecond++;
double x = currentSecond * xGrap;
double y = rd.Next(1,200);

//myTextBlock1.Text = (currentSecond-5).ToString();
//myTextBlock2.Text = (currentSecond-4).ToString();
//myTextBlock3.Text = (currentSecond-3).ToString();
//myTextBlock4.Text = (currentSecond-2).ToString();
//myTextBlock5.Text = (currentSecond-1).ToString();

//myTextBlock1.Text = date1.ToString("yyyy/MM/dd HH:mm:ss");;
date1 = _cur_date.AddSeconds(-5);
myTextBlock1.Text = date1.ToString("HH:mm:ss");

date1 = _cur_date.AddSeconds(-4);
myTextBlock2.Text = date1.ToString("HH:mm:ss");

date1 = _cur_date.AddSeconds(-3);
myTextBlock3.Text = date1.ToString("HH:mm:ss");

date1 = _cur_date.AddSeconds(-2);
myTextBlock4.Text = date1.ToString("HH:mm:ss");

date1 = _cur_date.AddSeconds(-1);
myTextBlock5.Text = date1.ToString("HH:mm:ss");

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代码如下：

App.xaml的代码如下：

（四）WPF使用 Polyline 元素动态绘制折线 （添加X轴时间标签）

猜你喜欢

（四）WPF使用 Polyline 元素动态绘制折线（添加X轴时间标签）