windows forms 简单例子

写一个求和界面的图形程序

前两个文本框定义name为 theNum1,theNum2
结果框定义name为theAns
按钮定义name为theAddbut
有代码

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 visSum
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void theAddbut_Click(object sender, EventArgs e)
        {
            int a = Convert.ToInt32(theNum1.Text);
            int b = Convert.ToInt32(theNum2.Text);
            int c = a + b;
            theAns.Text = Convert.ToString(c);
        }
    }
}

运行结果: