C#Windows应用—加法计数器

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  • 来源:互联网

运用C#建立一个窗体的加法计数器

代码如下:


 

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

namespace WindowsFormsApplication1dishizhou1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {
            if (textBox1.Text.Length == 0 || textBox2.Text.Length == 0)
            {
                MessageBox.Show("请输入数!");
                return;
            }
            try
            {
                double x = double.Parse(textBox1.Text);
                double y = double.Parse(textBox2.Text);
                textBox3.Text = (x + y).ToString();

            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

        private void textBox3_TextChanged(object sender, EventArgs e)
        {

        }

        private void textBox2_TextChanged(object sender, EventArgs e)
        {

        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }
    }
}


窗体展示:

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