form1.cs

来自「c#开发宝典 光盘内容。本光盘主要为书中的源程序」· CS 代码 · 共 49 行

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

namespace Example19_4
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        /// <summary>
        /// 初始化时计算天数
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void Form1_Load(object sender, EventArgs e)
        {
            label1.Text = "今天是本年度第" + dateTimePicker1.Value.DayOfYear.ToString() + "天";
            label2.Text = "两个日期相差：" + Convert.ToString(dateTimePicker1.Value.DayOfYear - dateTimePicker2.Value.DayOfYear);
        }

        /// <summary>
        /// 选择改变时计算相差多少天
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void dateTimePicker1_ValueChanged(object sender, EventArgs e)
        {
            label2.Text = "两个日期相差：" + Convert.ToString(dateTimePicker1.Value.DayOfYear - dateTimePicker2.Value.DayOfYear);
        }

        /// <summary>
        /// 选择改变时计算相差多少天
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void dateTimePicker2_ValueChanged(object sender, EventArgs e)
        {
            label2.Text = "两个日期相差：" + Convert.ToString(dateTimePicker1.Value.DayOfYear - dateTimePicker2.Value.DayOfYear);
        }
    }
}