WPF计算器小案例

WPF计算器小案例

这个小案例只是让大家简单了解一下C#中 类 的使用：

1.新建页面---MainWindow.xaml

<Window x:Class="WpfApp2.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:WpfApp2"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <Grid>
        <TextBox Name="t1" HorizontalAlignment="Left" Margin="104,99,0,0" Text="" TextWrapping="Wrap" VerticalAlignment="Top" Width="120" TextChanged="TextBox_TextChanged"/>
        <Label Content="+" HorizontalAlignment="Left" Margin="256,90,0,0" VerticalAlignment="Top" FontSize="20"/>
        <TextBox Name="t2" HorizontalAlignment="Left" Margin="326,99,0,0" Text="" TextWrapping="Wrap" VerticalAlignment="Top" Width="120" TextChanged="TextBox_TextChanged"/>
        <Label Content="=" HorizontalAlignment="Left" Margin="508,90,0,0" VerticalAlignment="Top" FontSize="20" RenderTransformOrigin="1.119,-0.148"/>
        <TextBox Name="t3" HorizontalAlignment="Left" Margin="585,99,0,0" Text="" TextWrapping="Wrap" VerticalAlignment="Top" Width="120" TextChanged="TextBox_TextChanged"/>
        <Button Content="加法计算" HorizontalAlignment="Left" Margin="130,0,0,0" VerticalAlignment="Center" FontSize="16" Click="Button_Click" RenderTransformOrigin="2.383,-0.224"/>
        <Button Content="归零" HorizontalAlignment="Left" Margin="502,211,0,0" VerticalAlignment="Top" FontSize="16" Click="Button_Click_1"/>
        <Button Content="减法计算" HorizontalAlignment="Left" Margin="130,265,0,0" VerticalAlignment="Top" FontSize="16" Click="Button_Click_2" RenderTransformOrigin="2.383,-0.224"/>

    </Grid>
</Window>

2.逻辑界面-----MainWindow.xaml.cs

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 WpfApp2
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    /// 
    class myclass   ///定义类
    {
       public double add(double a,double b) //这里定义了一个加法的类
    {
        double sum1 = a + b;
        return sum1;
    }
       public double sub(double a, double b)//这里定义了一个减法的类
    { 
            double sum2 = a - b;
            return sum2;
    }
    }

    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void TextBox_TextChanged(object sender, TextChangedEventArgs e)
        {

        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            string aa = t1.Text;
            double a1 = Convert.ToDouble(aa);
            string bb = t2.Text;
            double b1 = Convert.ToDouble(bb);
        
            myclass mc = new myclass();//引用之前定义的类
            double c1 = mc.add(a1, b1);
            t3.Text = c1.ToString();

        }

        private void Button_Click_1(object sender, RoutedEventArgs e)
        {
            t1.Text = "";
            t2.Text = "";
            t3.Text = "";
        }

        private void Button_Click_2(object sender, RoutedEventArgs e)
        {
            string aa = t1.Text;
            double a1 = Convert.ToDouble(aa);
            string bb = t2.Text;
            double b1 = Convert.ToDouble(bb);
        
            myclass mc = new myclass();//引用之前定义的类
            double c1 = mc.sub(a1, b1);
            t3.Text = c1.ToString();
        }
    }


}

3.页面展示