MainWindow.xaml.cs

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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;

namespace WpfCalucation
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        /// <summary>
        /// 上一次计算结果
        /// </summary>
        public double preValue 
        {
            get;set;
        }
        /// <summary>
        /// 当前计算结果
        /// </summary>
        public double currValue { get; set; }
        /// <summary>
        /// 当前计算符号
        /// </summary>
        public string currSymbol { get { return symbol.Text; } set { symbol.Text = value; } }
        /// <summary>
        /// 当前计算是否已结束
        /// </summary>
        public bool isDone { get; set; }
        List<int> canKey = new List<int>() { 1,2, 5, 6,32,
            34,35,36,37,38,39,40,41,42,43,
            74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89, 
            141,143,147,148,153,154};

        public MainWindow()
        {
            InitializeComponent();
        }

        private void Button_Click(object sender, MouseButtonEventArgs e)
        {
            //检索当前按钮
            Button currentBtn = (Button)e.Source;
            string key = currentBtn.Content.ToString();
            Click(key);
        }

        private void key_Click(object sender, KeyEventArgs e)