奇数计算器错误(WPF应用程序)

nzkunb0c 于 2023-06-23 发布在其他

关注(0)|答案(1)|浏览(153)

XAML程式码：

<Window x:Class="rekenmachine_variant_true.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:rekenmachine_variant_true"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="118*"/>
            <ColumnDefinition Width="683*"/>
        </Grid.ColumnDefinitions>
        <Grid.RowDefinitions>
            <RowDefinition/>
            <RowDefinition Height="0*"/>
        </Grid.RowDefinitions>

        <Button Content="1" Click="num_Click" HorizontalAlignment="Left" Margin="27,334,0,0" VerticalAlignment="Top" Height="80" Width="80" Name="num1" FontFamily="Courier New" FontSize="72"/>
        <Button Content="2" Click="num_Click" HorizontalAlignment="Left" Margin="117,334,0,0" VerticalAlignment="Top" Height="80" Width="80" Name="num2" FontFamily="Courier New" FontSize="72" Grid.ColumnSpan="2"/>
        <Button Content="3" Click="num_Click" HorizontalAlignment="Left" Margin="90,334,0,0" VerticalAlignment="Top" Height="80" Width="80" Name="num3" FontFamily="Courier New" FontSize="72" Grid.Column="1"/>
        <Button Content="4" Click="num_Click" HorizontalAlignment="Left" Margin="27,244,0,0" VerticalAlignment="Top" Height="80" Width="80" Name="num4" FontFamily="Courier New" FontSize="72"/>
        <Button Content="5" Click="num_Click" HorizontalAlignment="Left" Margin="117,244,0,0" VerticalAlignment="Top" Height="80" Width="80" Name="num5" FontFamily="Courier New" FontSize="72" Grid.ColumnSpan="2"/>
        <Button Content="6" Click="num_Click" HorizontalAlignment="Left" Margin="90,244,0,0" VerticalAlignment="Top" Height="80" Width="80" Name="num6" FontSize="72" FontFamily="Courier New" Grid.Column="1"/>
        <Button Content="7" Click="num_Click" HorizontalAlignment="Left" Margin="27,155,0,0" VerticalAlignment="Top" Height="80" Width="80" Name="num7" FontSize="72" FontFamily="Courier New"/>
        <Button Content="8" Click="num_Click" HorizontalAlignment="Left" Margin="117,155,0,0" VerticalAlignment="Top" Height="80" Width="80" x:Name="num8" FontSize="72" FontFamily="Courier New" Grid.ColumnSpan="2"/>
        <Button Content="9" Click="num_Click" HorizontalAlignment="Left" Margin="90,155,0,0" VerticalAlignment="Top" Height="80" Width="80" x:Name="num9" FontSize="72" FontFamily="Courier New" Grid.Column="1"/>
        <Button Content="0" Click="num_Click" HorizontalAlignment="Left" Margin="180,244,0,0" VerticalAlignment="Top" Height="80" Width="80" x:Name="num0" FontSize="72" FontFamily="Courier New" FontStyle="Normal" Grid.Column="1"/>

        <Button Content="." Click="decimal_Click" HorizontalAlignment="Left" Margin="180,334,0,0" VerticalAlignment="Top" Height="80" Width="80" x:Name="Nul_Copy" FontSize="72" FontFamily="Courier New" FontStyle="Normal" Grid.Column="1"/>
        <Button Content="*" Click="keer_Click"  HorizontalAlignment="Left" Margin="391,333,0,0" VerticalAlignment="Top" Height="80" Width="80"  FontSize="72" FontFamily="Courier New" Grid.Column="1"/>
        <Button Content="/" Click="deel_Click" HorizontalAlignment="Left" Margin="483,333,0,0" VerticalAlignment="Top" Height="80" Width="80" FontSize="72" FontFamily="Courier New" Grid.Column="1"/>
        <Button Content="=" Click="is_Click" HorizontalAlignment="Left"  Margin="575,332,0,0" VerticalAlignment="Top" Height="81" Width="80" FontSize="72" FontFamily="Courier New" FontStyle="Normal" Grid.Column="1"   />
        <Button Content="+" Click="plus_Click" HorizontalAlignment="Left" Margin="391,243,0,0" VerticalAlignment="Top" Height="80" Width="80" FontSize="72" FontFamily="Courier New" Grid.Column="1"/>
        <Button Content="-" Click="minus_Click" HorizontalAlignment="Left" Margin="483,243,0,0" VerticalAlignment="Top" Height="80" Width="80" FontSize="72" FontFamily="Courier New" Grid.Column="1"/>
        <Button Content="%" Click="modulo_Click" HorizontalAlignment="Left" Margin="392,155,0,0" VerticalAlignment="Top" Height="80" Width="263"  FontSize="72" FontFamily="Courier New" Grid.Column="1"/>

        <Button Content="CE" Click="clear_Click" HorizontalAlignment="Left" Margin="180,155,0,0" VerticalAlignment="Top"  Height="80" Width="80" FontSize="72" FontFamily="Bahnschrift Condensed" Background="#FFFFE74E" Grid.Column="1"/>
        <Button x:Name="minmax" Content="-/+" Click="minusPlus_Click" HorizontalAlignment="Left"  Margin="575,243,0,0" VerticalAlignment="Top" Height="81" Width="80" FontSize="36" FontFamily="Courier New" FontStyle="Normal" Grid.Column="1" FontWeight="SemiBold"/>

        <TextBox x:Name="TxtBox" HorizontalAlignment="Left" Margin="27,24,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="746" Grid.ColumnSpan="2" Height="110" FontSize="72" FontStyle="Normal" FontFamily="Segoe UI" TextAlignment="Right"/>


    </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 rekenmachine_variant_true
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        decimal valueFirst;
        decimal valueSecond;

        char operators;

        private void decimal_Click(object sender, RoutedEventArgs e)
        {
            if (!TxtBox.Text.Contains("."))
            {
                TxtBox.Text += '.';
            }
        }

        private void num_Click(object sender, RoutedEventArgs e)
        {
            Button btn = (Button)sender;
            TxtBox.Text += btn.Content.ToString();
            valueFirst = decimal.Parse(TxtBox.Text);
        }

        private void minusPlus_Click(object sender, RoutedEventArgs e)
        {
            if (TxtBox.Text.Contains("-"))
            {
                TxtBox.Text = TxtBox.Text.Trim('-');
            }
            else
            {
                TxtBox.Text = "-" + TxtBox.Text;
            }
        }

        private void minus_Click(object sender, RoutedEventArgs e)
        {
            valueFirst = decimal.Parse(TxtBox.Text);
            TxtBox.Clear();
            operators = '-';
        }

        private void plus_Click(object sender, RoutedEventArgs e)
        {
            valueFirst = decimal.Parse(TxtBox.Text);
            TxtBox.Clear();
            operators = '+';
        }

        private void keer_Click(object sender, RoutedEventArgs e)
        {
            valueFirst = decimal.Parse(TxtBox.Text);
            TxtBox.Clear();
            operators = '*';
        }

        private void deel_Click(object sender, RoutedEventArgs e)
        {
            valueFirst = decimal.Parse(TxtBox.Text);
            TxtBox.Clear();
            operators = '/';
        }

        private void modulo_Click(object sender, RoutedEventArgs e)
        {
            valueFirst = decimal.Parse(TxtBox.Text);
            TxtBox.Clear();
            operators = '%';
        }

        private void is_Click(object sender, RoutedEventArgs e)
        {
            valueSecond = decimal.Parse(TxtBox.Text);
            decimal result = 0;

            if(operators == '+')
            {
                result = valueFirst + valueSecond;
                TxtBox.Text = result.ToString();
            }
            else if (operators == '-')
            {
                result = valueFirst - valueSecond;
                TxtBox.Text = result.ToString();
            }
            else if (operators == '*')
            {
                result = valueFirst * valueSecond;
                TxtBox.Text = result.ToString();
            }
            else if (operators == '/')
            {
                result = valueFirst / valueSecond;
                TxtBox.Text = result.ToString();
            }
            else if (operators == '%')
            {
                result = valueFirst % valueSecond;
                TxtBox.Text = result.ToString();
            }
            if (TxtBox.Text == "0")
            {
                TxtBox.Clear();
            }
        }

        private void clear_Click(object sender, RoutedEventArgs e)
        {
            TxtBox.Clear();
        }

        public MainWindow()
        {
            InitializeComponent();
        }
    }
}

**注意：**我知道minPlus，modulo，& decimal在atm下不起作用，但我想自己来计算它们。（清除按钮并不真正清除值，它只是清除txtbox中的文本）

问题：与按钮2（名称：“num 2”）会把整个计算搞得一团糟，我不明白为什么会这样。是不是小数的某些地方把它搞得一团糟？
示例：
二加六=十二
2 - 6个空白结果
85 + 2 = 4
更改数字2按钮上的内容似乎根本不起作用，它始终给出与上面示例相同的结果。

wpf

来源：https://stackoverflow.com/questions/74570247/odd-calculator-bug-wpf-application

1条答案

按热度按时间

imzjd6km1#

这段代码是错误的：

private void num_Click(object sender, RoutedEventArgs e)
    {
        Button btn = (Button)sender;
        TxtBox.Text += btn.Content.ToString();
        valueFirst = decimal.Parse(TxtBox.Text);
    }

对于第一个条目，它可能是好的，但在按下操作员按钮后，TxtBox的内容将类似于：2+6
因此，valueFirst = decimal.Parse(TxtBox.Text);将使decimal尝试解析“2+6”。
试试看：

private void num_Click(object sender, RoutedEventArgs e)
    {
        Button btn = (Button)sender;
        TxtBox.Text += btn.Content.ToString();
        valueFirst = decimal.Parse(btn.Content.ToString());
    }

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奇数计算器错误(WPF应用程序)

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