C#入门篇6-10：字符串操作 DateTime操作

#region DateTime操作 public class C3 { //DateTime常用的操作 public static void Fun1() { //格式：2012-8-16 11:21:29 Console.WriteLine("当前时间：{0}", DateTime.Now.ToString()); //格式：2012-8-16 0:00:00 Console.WriteLine("日期部分：{0}", DateTime.Now.Date.ToString()); //格式：11:21:29 Console.WriteLine("时间部分：{0}", DateTime.Now.ToLongTimeString()); //获取此实例的当天的时间。相当的精确【到毫秒】 Console.WriteLine("TimeOfDay:{0}", DateTime.Now.TimeOfDay.ToString()); Console.WriteLine("取中文日期显示_年月日时分:{0}", DateTime.Now.ToString("f")); Console.WriteLine("取中文日期显示_年月:{0}", DateTime.Now.ToString("y")); Console.WriteLine("取中文日期显示_月日:{0}", DateTime.Now.ToString("m")); Console.WriteLine("取中文年月日:{0}", DateTime.Now.ToString("D")); //取当前时分，格式为：14：24 Console.WriteLine("取当前时分:{0}", DateTime.Now.ToString("t")); //取当前时间，格式为：2003-09-23T14:46:48 Console.WriteLine("取当前时分:{0}", DateTime.Now.ToString("s")); //取当前时间，格式为：2003-09-23 14:48:30Z Console.WriteLine("取当前时分:{0}", DateTime.Now.ToString("u")); //取当前时间，格式为：2003-09-23 14:48 Console.WriteLine("取当前时分:{0}", DateTime.Now.ToString("g")); //取当前时间，格式为：Tue, 23 Sep 2003 14:52:40 GMT Console.WriteLine("取当前时分:{0}", DateTime.Now.ToString("r")); //获得当前时间 n 天后的日期时间 DateTime newDay = DateTime.Now.AddDays(); Console.WriteLine(newDay.ToString()); Console.WriteLine("年：{0}", DateTime.Now.Year.ToString()); Console.WriteLine("月：{0}", DateTime.Now.Month.ToString()); Console.WriteLine("日：{0}", DateTime.Now.Day.ToString()); Console.WriteLine("时：{0}", DateTime.Now.Hour.ToString()); Console.WriteLine("分：{0}", DateTime.Now.Minute.ToString()); Console.WriteLine("秒：{0}", DateTime.Now.Second.ToString()); Console.WriteLine("毫秒：{0}", DateTime.Now.Millisecond.ToString()); Console.WriteLine("计时周期数：{0}", DateTime.Now.Ticks.ToString()); Console.WriteLine("星期：{0}", DateTime.Now.DayOfWeek.ToString()); Console.WriteLine("一年中的第几天：{0}", DateTime.Now.DayOfYear.ToString()); } //客户端代码 public static void MyFun() { //struct本身是一个结构体 //DateTime dt0 = new DateTime(); DateTime dt1 = , , , , , ); DateTime dt2 = , , );//2012-12-21 00:00:00 Console.WriteLine(DateDiff(dt1, dt2)); //我活了多少天了 DateTime dt3 = , , , , , ); DateTime dt4 = , , , , , );//2012-12-21 00:00:00 Console.WriteLine("我活了多少天" + DateDiff(dt4, dt3)); } //计算时间的差值 public static string DateDiff(DateTime DateTime1, DateTime DateTime2) { string dateDiff = null; TimeSpan ts1 = new TimeSpan(DateTime1.Ticks); TimeSpan ts2 = new TimeSpan(DateTime2.Ticks); TimeSpan ts = ts1.Subtract(ts2).Duration(); dateDiff = ts.Days.ToString() + "天" + ts.Hours.ToString() + "小时" + ts.Minutes.ToString() + "分钟" + ts.Seconds.ToString() + "秒"; return dateDiff; #region note //C#中使用TimeSpan计算两个时间的差值 //可以反加两个日期之间任何一个时间单位。 //TimeSpan ts = Date1 - Date2; //double dDays = ts.TotalDays;//带小数的天数，比如1天12小时结果就是1.5 //int nDays = ts.Days;//整数天数，1天12小时或者1天20小时结果都是1 #endregion } } #endregion