限制位置简单算法例子版

【核心代码】

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.Threading;
using System.Windows.Threading;

namespace CerenTest
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();

           
        }
        /// <summary>
        /// 定时器
        /// </summary>
        public static DispatcherTimer t_RunDeviceState = new DispatcherTimer();

        public Point pt ;
        public Point point;
        double a;
        bool kz = false;
        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            

            t_RunDeviceState.Tick  = new EventHandler(test);
            t_RunDeviceState.Interval = TimeSpan.FromMilliseconds(999);
            t_RunDeviceState.Start();

            //获取宽度
             a = ce.Width;
            
           //获取车一控件在屏幕上位置的二维坐标
            Window window = Window.GetWindow(lbl1);
             point = lbl1.TransformToAncestor(window).Transform(new Point(0, 0));


            //获取车2
            Window lbl22 = Window.GetWindow(lbl2);
             pt = lbl2.TransformToAncestor(lbl22).Transform(new Point(0, 0));

           
            

        }
        double aaa = 0;
        //测试
        public void test(object sender ,EventArgs e)
        {
            
         
            if(kz==false)
            {
                pt.X = pt.X - 1; //测试交叉车
               // pt.X--;
                //  pt.X = pt.X  10; //测试越界
                //pt.X  ;
                ju.Content = "当前位置："   pt.X;
                lbl2.SetValue(Canvas.LeftProperty, pt.X);
                //防止越界
                //double b = a - point.X;
                //不能小于屏幕宽度并且不能大于屏幕宽度
                if (point.X < 0 || point.X > a || pt.X < 0 || point.X > a)
                {
                    System.Windows.Forms.MessageBox.Show("cao越界了");
                }

                //判断
                if (pt.X <= point.X  20|| point.X > pt.X || pt.X >= a)
                {
                    //System.Windows.Forms.MessageBox.Show("越界了");

                    
                     kz=true;

                }
            }
            else
            {
                lbl2.SetValue(Canvas.LeftProperty, pt.X);
            }
           
        }
   
       
    }
}