wpf 计算器 源码(入门级)

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 WpfCalc{ /// <summary> /// MainWindow.xaml 的交互逻辑 /// </summary> public partial class MainWindow : Window { Dictionary<string, string> OperationDict;//存储两个运算数和运算符的字典 string num2Str = "";//存储第二个数的临时变量 public MainWindow() { InitializeComponent(); Title = "计算器"; btnC.Click = BtnC_Click; btnE.Click = BtnE_Click; btnD.Click = new RoutedEventHandler(BtnOperator_Click); btnX.Click = new RoutedEventHandler(BtnOperator_Click); btnM.Click = new RoutedEventHandler(BtnOperator_Click); btnP.Click = new RoutedEventHandler(BtnOperator_Click); btn9.Click = new RoutedEventHandler(BtnNum_Click); btn8.Click = new RoutedEventHandler(BtnNum_Click); btn7.Click = new RoutedEventHandler(BtnNum_Click); btn6.Click = new RoutedEventHandler(BtnNum_Click); btn5.Click = new RoutedEventHandler(BtnNum_Click); btn4.Click = new RoutedEventHandler(BtnNum_Click); btn3.Click = new RoutedEventHandler(BtnNum_Click); btn2.Click = new RoutedEventHandler(BtnNum_Click); btn1.Click = new RoutedEventHandler(BtnNum_Click); btn0.Click = new RoutedEventHandler(BtnNum_Click); OperationDict = new Dictionary<string, string>(); } private void BtnOperator_Click(object sender, RoutedEventArgs e)//运算符点击事件 { try { var opr = sender as Button; if (ShowNumText.Text == "") return; switch (opr.Content.ToString()) { case " ": OperationDict.Add("Operator", " "); break; case "—": OperationDict.Add("Operator", "-"); break; case "X": OperationDict.Add("Operator", "*"); break; case "/": OperationDict.Add("Operator", "/"); break; } ShowNumText.Text = opr.Content.ToString(); } catch (Exception e2) { MessageBox.Show(e2.ToString()); } } private void BtnE_Click(object sender, RoutedEventArgs e)//等于键点击事件 { try { ShowNumText.Text = "="; string str1 = "", str2 = "", opr = ""; if (OperationDict.TryGetValue("Num1", out str1) && OperationDict.TryGetValue("Operator", out opr) && OperationDict.TryGetValue("Num2", out str2)) {//如果字典中两个运算数和运算符都不为空，则执行运算 int num1 = int.Parse(str1); int num2 = int.Parse(str2); switch (opr) { case " ": ShowNumText.Text = (num1 num2).ToString(); break; case "-": ShowNumText.Text = (num1 - num2).ToString(); break; case "*": ShowNumText.Text = (num1 * num2).ToString(); break; case "/": ShowNumText.Text = (num1 / num2).ToString(); break; } //MessageBox.Show(OperationDict["Num1"] ":" OperationDict["Operator"] ":" OperationDict["Num2"]); OperationDict.Clear(); num2Str = ""; OperationDict.Add("Num1", ShowNumText.Text); } else { return; } } catch (Exception e1) { MessageBox.Show(e1.ToString()); } } private void BtnC_Click(object sender, RoutedEventArgs e)//清除键点击事件 { OperationDict.Clear(); ShowNumText.Text = ""; num2Str = ""; } private void BtnNum_Click(object sender, RoutedEventArgs e)//数字点击事件 { var num = sender as Button; string value = ""; if (!OperationDict.TryGetValue("Operator", out value)) {//运算符为空，存储的数字为第一个 if (ShowNumText.Text == "") { ShowNumText.Text = num.Content.ToString(); OperationDict.Add("Num1", num.Content.ToString()); } else { ShowNumText.Text = num.Content.ToString(); OperationDict["Num1"] = ShowNumText.Text; } } else {//运算符不为空，存储的数字为第二个 if (num2Str == "") { ShowNumText.Text = num.Content.ToString(); num2Str = num.Content.ToString(); OperationDict.Add("Num2", num.Content.ToString()); } else { ShowNumText.Text = num.Content.ToString(); num2Str = num.Content.ToString(); OperationDict["Num2"] = num2Str; } } } }}