C# 和 XAML 实现简单计算器应用 - 代码示例

以下是一个使用 C# 和 XAML 实现的简单计算器应用示例：\n\nMainWindow.xaml：\n\nxaml\n<Window x:Class="CalculatorApp.MainWindow"\n xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"\n xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"\n Title="Calculator" Height="350" Width="250">\n <Grid>\n <TextBox x:Name="resultTextBox" HorizontalAlignment="Stretch" VerticalAlignment="Top" Margin="10" Height="50" Text="{Binding Result}" IsReadOnly="True" FontSize="20" TextAlignment="Right"/>\n\n <Grid Grid.Row="1" Margin="10">\n <Grid.ColumnDefinitions>\n <ColumnDefinition Width="*"/>\n <ColumnDefinition Width="*"/>\n <ColumnDefinition Width="*"/>\n <ColumnDefinition Width="*"/>\n </Grid.ColumnDefinitions>\n <Grid.RowDefinitions>\n <RowDefinition Height="*"/>\n <RowDefinition Height="*"/>\n <RowDefinition Height="*"/>\n <RowDefinition Height="*"/>\n <RowDefinition Height="*"/>\n </Grid.RowDefinitions>\n \n <Button x:Name="btn1" Grid.Row="1" Grid.Column="0" Content="1" Click="Number_Click"/>\n <Button x:Name="btn2" Grid.Row="1" Grid.Column="1" Content="2" Click="Number_Click"/>\n <Button x:Name="btn3" Grid.Row="1" Grid.Column="2" Content="3" Click="Number_Click"/>\n <Button x:Name="btnAdd" Grid.Row="1" Grid.Column="3" Content="+" Click="Operator_Click"/>\n \n <Button x:Name="btn4" Grid.Row="2" Grid.Column="0" Content="4" Click="Number_Click"/>\n <Button x:Name="btn5" Grid.Row="2" Grid.Column="1" Content="5" Click="Number_Click"/>\n <Button x:Name="btn6" Grid.Row="2" Grid.Column="2" Content="6" Click="Number_Click"/>\n <Button x:Name="btnSubtract" Grid.Row="2" Grid.Column="3" Content="-" Click="Operator_Click"/>\n \n <Button x:Name="btn7" Grid.Row="3" Grid.Column="0" Content="7" Click="Number_Click"/>\n <Button x:Name="btn8" Grid.Row="3" Grid.Column="1" Content="8" Click="Number_Click"/>\n <Button x:Name="btn9" Grid.Row="3" Grid.Column="2" Content="9" Click="Number_Click"/>\n <Button x:Name="btnMultiply" Grid.Row="3" Grid.Column="3" Content="*" Click="Operator_Click"/>\n \n <Button x:Name="btn0" Grid.Row="4" Grid.Column="0" Grid.ColumnSpan="2" Content="0" Click="Number_Click"/>\n <Button x:Name="btnDecimal" Grid.Row="4" Grid.Column="2" Content="." Click="Decimal_Click"/>\n <Button x:Name="btnDivide" Grid.Row="4" Grid.Column="3" Content="/" Click="Operator_Click"/>\n \n <Button x:Name="btnClear" Grid.Row="5" Grid.Column="0" Grid.ColumnSpan="2" Content="C" Click="Clear_Click"/>\n <Button x:Name="btnEquals" Grid.Row="5" Grid.Column="2" Grid.ColumnSpan="2" Content="=" Click="Equals_Click"/>\n </Grid>\n </Grid>\n</Window>\n\n\nMainWindow.xaml.cs：\n\ncsharp\nusing System;\nusing System.Windows;\n\nnamespace CalculatorApp\n{\n public partial class MainWindow : Window\n {\n private string currentNumber = "";\n private string selectedOperator = "";\n private double result = 0;\n\n public MainWindow()\n {\n InitializeComponent();\n DataContext = this;\n }\n\n public string Result { get; set; }\n\n private void Number_Click(object sender, RoutedEventArgs e)\n {\n Button button = sender as Button;\n currentNumber += button.Content.ToString();\n Result = currentNumber;\n }\n\n private void Operator_Click(object sender, RoutedEventArgs e)\n {\n Button button = sender as Button;\n selectedOperator = button.Content.ToString();\n result = double.Parse(currentNumber);\n currentNumber = "";\n }\n\n private void Decimal_Click(object sender, RoutedEventArgs e)\n {\n if (!currentNumber.Contains("."))\n {\n currentNumber += ".";\n }\n }\n\n private void Clear_Click(object sender, RoutedEventArgs e)\n {\n currentNumber = "";\n selectedOperator = "";\n result = 0;\n Result = "";\n }\n\n private void Equals_Click(object sender, RoutedEventArgs e)\n {\n double secondNumber = double.Parse(currentNumber);\n switch (selectedOperator)\n {\n case "+":\n result += secondNumber;\n break;\n case "-":\n result -= secondNumber;\n break;\n case "*":\n result *= secondNumber;\n break;\n case "/":\n result /= secondNumber;\n break;\n }\n Result = result.ToString();\n currentNumber = "";\n selectedOperator = "";\n }\n }\n}\n\n\n在这个示例中，我们使用一个TextBox来显示计算结果，并使用Button元素来输入数字和操作符。当点击数字按钮时，我们将数字添加到当前输入的数字字符串中，并将其显示在TextBox中。当点击操作符按钮时，我们将当前输入的数字转换为double类型，并将其保存为结果。当点击等号按钮时，我们根据当前选择的操作符对结果进行计算，并将结果显示在TextBox中。点击清除按钮时，我们将所有变量重置为初始状态。\n\n这只是一个简单的计算器应用示例，可以根据需求进行扩展和改进。