WPF计算器设计

今天做了一个简单的加减乘除计算器：通过comboBox来选择计算方式，把编辑框内的两个数据进行计算，并显示到最终的编辑框中。

设计代码：

<Window x:Class="Calculator.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="500">
    <Grid Background="LightBlue">
        <TextBox x:Name="textBox1" HorizontalAlignment="Left" Margin="10,32,0,0" VerticalAlignment="Top" Width="400"  Background="BurlyWood"/>
        <TextBox x:Name="textBox2" HorizontalAlignment="Left" Margin="10,79,0,0"  VerticalAlignment="Top" Width="400" Background="GreenYellow"/>
        <TextBox x:Name="textBox3" HorizontalAlignment="Left" Margin="10,126,0,0"  VerticalAlignment="Top" Width="400" Background="Goldenrod"/>
        <Label Content="Data:" HorizontalAlignment="Left" Margin="10,1,0,0" VerticalAlignment="Top"/>
        <Label Content="Data:" HorizontalAlignment="Left" Margin="10,59,0,0" VerticalAlignment="Top"/>
        <Label Content="Result:" HorizontalAlignment="Left" Margin="10,106,0,0" VerticalAlignment="Top"/>
        <Label Content="Method:" HorizontalAlignment="Left" Margin="10,150,0,0" VerticalAlignment="Top"/>
        <Button Content="Calculate" HorizontalAlignment="Left" Margin="150,250,0,0" VerticalAlignment="Top" Width="80" Background="Green" Click="Click_Calculator" />
        <Button Content="Exit" HorizontalAlignment="Left" Margin="300,250,0,0" VerticalAlignment="Top" Width="80" Background="CadetBlue" Click="Click_Exit"/>
        <ComboBox x:Name="method" HorizontalAlignment="Left" Margin="25,171,0,0" VerticalAlignment="Top" Width="120">
            <ComboBoxItem>Add </ComboBoxItem>
            <ComboBoxItem>subtraction</ComboBoxItem>
            <ComboBoxItem> multiplication </ComboBoxItem>
            <ComboBoxItem>division</ComboBoxItem>
        </ComboBox>

    </Grid>
</Window>

cs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;

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

        private void Click_Calculator(object sender, RoutedEventArgs e)
        {
            double fdat0,fdat1,fdat2;
            string str0 = textBox1.Text;
            string str1 = textBox2.Text;
            try
            {
                fdat0 = Convert.ToDouble(str0);
                fdat1 = Convert.ToDouble(str1);
                if (method.SelectedIndex == 0)///add
                {
                    fdat2 = fdat0 + fdat1;
                }
                else if (method.SelectedIndex == 1)///subtraction
                {
                    fdat2 = fdat0 - fdat1;
                }
                else if (method.SelectedIndex == 2)///multiplication
                {
                    fdat2 = fdat0 * fdat1;
                }
                else if (method.SelectedIndex == 3)///division
                {
                    fdat2 = fdat0 / fdat1;
                }
                else
                {
                    fdat2 = fdat0 + fdat1;
                }
                textBox3.Text = Convert.ToString(fdat2);
            }
            catch (Exception ex)
            {
                MessageBox.Show("A handled exception just occurred: " + ex.Message, "Exception Sample", MessageBoxButton.OK, MessageBoxImage.Warning);
            }
        }
        private void Click_Exit(object sender, RoutedEventArgs e)
        {
            App.Current.Shutdown();
        }
    }
}

运行结果：

谢谢.