C#简单计算器源码

C#简单计算器源码：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace 简单计算器
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        
        private void Form1_Load(object sender, EventArgs e)
        {
            //string v = this.ProductName;
            //this.UseWaitCursor = new bool();
            int num1 = Convert.ToInt32(textBox1.Text);
            int num2 = Convert.ToInt32(textBox2.Text);
            string type = comboBox1.SelectedItem.ToString();
            

        }

        private void button1_Click(object sender, EventArgs e)
        {
            int num1 = Convert.ToInt32(textBox1.Text);
            int num2 = Convert.ToInt32(textBox2.Text);
            string type = comboBox1.SelectedItem.ToString();
            if (type=="+")
            {
                int sum = num1 + num2;
                label2.Text = Convert.ToString(sum);
            }
            if (type == "-")
            {
                int sum = num1 - num2;
                label2.Text = Convert.ToString(sum);
                
            }
            if (type == "*")
            {
                int sum = num1 * num2;
                label2.Text = Convert.ToString(sum);
                
            }
            if (type == "/")
            {
                int sum = num1 / num2;
                label2.Text = Convert.ToString(sum);
                
            }
        }
    }
}

运行结果：