c#计算器窗体

这是一个基本的 C# 计算器窗体的示例代码：

using System;
using System.Windows.Forms;

namespace Calculator
{
    public partial class CalculatorForm : Form
    {
        public CalculatorForm()
        {
            InitializeComponent();
        }

        private void NumberButton_Click(object sender, EventArgs e)
        {
            Button button = (Button)sender;
            if (ResultTextBox.Text == "0")
                ResultTextBox.Text = button.Text;
            else
                ResultTextBox.Text += button.Text;
        }

        private void OperatorButton_Click(object sender, EventArgs e)
        {
            Button button = (Button)sender;
            string operatorValue = button.Text;

            if (!string.IsNullOrEmpty(OperatorLabel.Text))
            {
                double operand1 = double.Parse(ResultTextBox.Text);
                double operand2 = double.Parse(OperandLabel.Text);
                double result = Calculate(operand2, operand1, OperatorLabel.Text);
                ResultTextBox.Text = result.ToString();
            }

            OperatorLabel.Text = operatorValue;
            OperandLabel.Text = ResultTextBox.Text;
            ResultTextBox.Text = "0";
        }

        private void EqualsButton_Click(object sender, EventArgs e)
        {
            if (!string.IsNullOrEmpty(OperatorLabel.Text))
            {
                double operand1 = double.Parse(ResultTextBox.Text);
                double operand2 = double.Parse(OperandLabel.Text);
                double result = Calculate(operand2, operand1, OperatorLabel.Text);
                ResultTextBox.Text = result.ToString();
                OperatorLabel.Text = "";
                OperandLabel.Text = "";
            }
        }

        private void ClearButton_Click(object sender, EventArgs e)
        {
            ResultTextBox.Text = "0";
            OperatorLabel.Text = "";
            OperandLabel.Text = "";
        }

        private double Calculate(double operand1, double operand2, string operatorValue)
        {
            switch (operatorValue)
            {
                case "+":
                    return operand1 + operand2;
                case "-":
                    return operand1 - operand2;
                case "*":
                    return operand1 * operand2;
                case "/":
                    return operand1 / operand2;
                default:
                    throw new ArgumentException("Invalid operator", "operatorValue");
            }
        }
    }
}

这里是一个简单的窗体，有一些按钮用于输入数字和操作符，一个文本框用于显示结果。用户可以按数字按钮输入数字，按运算符按钮执行计算并显示结果。这个窗体支持加、减、乘、除四种基本运算。