form2.cs

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

namespace DateTimeDemo_获取时间_
{
    public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            string dt, week = "";
            //DateTime.Now.ToString("MM-DD");
            //取得当前日期是星期几
            dt = DateTime.Now.DayOfWeek.ToString();
            switch (dt)
            {
                case "Monday":
                    week = "星期一";
                    break;
                case "Tuesday":
                    week = "星期二";
                    break;
                case "Wednesday":
                    week = "星期三";
                    break;
                case "Thursday":
                    week = "星期四";
                    break;
                case "Friday":
                    week = "星期五";
                    break;
                case"Saturday":
                    week = "星期六";
                    break;
                default:
                    week = "星期天";
                    break;
            }
            this.textBox1.Text=week;
        }

        private void button2_Click(object sender, EventArgs e)
        {
            //判断是否是闰年
            if (DateTime.IsLeapYear(Convert.ToInt16(this.textBox2.Text)))
            {
                //如果是闰年
                this.textBox2.Text = "366天";
            }
            else
            {
                //如果不是闰年
                this.textBox2.Text = "355天";
            }
        }

        private void button3_Click(object sender, EventArgs e)
        {
            int year, month, days = 0;
            year = DateTime.Now.Year;
            month = DateTime.Now.Month;
            //得到当前月的天数信息
            switch (month)
            {
                case 1:
                    days = 31;
                    break;
                case 2:
                    if (DateTime.IsLeapYear(year))
                    {
                        //闰年二月为29天
                        days = 29;
                    }
                    else
                    {
                        //不是闰年天数为28天
                        days = 28;
                    }
                    break;
                case 3:
                    days = 31;
                    break;
                case 4:
                    days = 30;
                    break;
                case 5:
                    days = 31;
                    break;
                case 6:
                    days = 30;
                    break;
                case 7:
                    days = 31;
                    break;
                case 8:
                    days = 31;
                    break;
                case 9:
                    days = 30;
                    break;
                case 10:
                    days = 31;
                    break;
                case 11:
                    days = 30;
                    break;
                case 12:
                    days = 31;
                    break;
            }
            this.textBox3.Text = days.ToString();
        }
    }
}