C# DateTime 工具类

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今天给大家带来一个C#里面的时间工具类，具体的直接看下面代码

using System; namespace ToolBox.DateTimeTool
{
public static class DateTimeExtend
{
/// <summary>
/// 获取本日开始时间（0点0分0秒）
/// </summary>
/// <param name="dateTime"></param>
/// <returns></returns>
public static DateTime GetDayStart(this DateTime dateTime)
{
return dateTime.Date;
} /// <summary>
/// 获取本日结束时间（23点59分59秒）
/// </summary>
/// <param name="dateTime"></param>
/// <returns></returns>
public static DateTime GetDayEnd(this DateTime dateTime)
{
return dateTime.Date.AddDays().AddMilliseconds(-);
} /// <summary>
/// 获取本周开始时间
/// </summary>
/// <param name="dateTime"></param>
/// <returns></returns>
public static DateTime GetWeekStart(this DateTime dateTime)
{
return dateTime.AddDays(-(int)dateTime.DayOfWeek + ).GetDayStart();
} /// <summary>
/// 获取本周结束时间
/// </summary>
/// <param name="dateTime"></param>
/// <returns></returns>
public static DateTime GetWeekEnd(this DateTime dateTime)
{
return dateTime.AddDays( - (int)dateTime.DayOfWeek).GetDayEnd();
} /// <summary>
/// 获取本月开始时间
/// </summary>
/// <param name="dateTime"></param>
/// <returns></returns>
public static DateTime GetMonthStart(this DateTime dateTime)
{
return new DateTime(dateTime.Year, dateTime.Month, , , , , );
} /// <summary>
/// 获取本月结束时间
/// </summary>
/// <param name="dateTime"></param>
/// <returns></returns>
public static DateTime GetMonthEnd(this DateTime dateTime)
{
return GetMonthStart(dateTime).AddMonths().AddMilliseconds(-);
} /// <summary>
/// 获取本季度开始时间
/// </summary>
/// <param name="dateTime"></param>
/// <returns></returns>
public static DateTime GetSeasonStart(this DateTime dateTime)
{
var time = dateTime.AddMonths( - ((dateTime.Month - ) % ));
return DateTime.Parse(time.AddDays(-time.Day + ).ToString("yyyy/MM/dd 00:00:00"));
} /// <summary>
/// 获取本季度结束时间
/// </summary>
/// <param name="dateTime"></param>
/// <returns></returns>
public static DateTime GetSeasonEnd(this DateTime dateTime)
{
var time = dateTime.AddMonths(( - ((dateTime.Month - ) % ) - ));
return DateTime.Parse(time.AddMonths().AddDays(-time.AddMonths().Day + ).AddDays(-).ToString("yyyy/MM/dd 23:59:59"));
} /// <summary>
/// 获取本年开始时间
/// </summary>
/// <param name="dateTime"></param>
/// <returns></returns>
public static DateTime GetYearStart(this DateTime dateTime)
{
return DateTime.Parse(dateTime.AddDays(-dateTime.DayOfYear + ).ToString("yyyy/MM/dd 00:00:00"));
} /// <summary>
/// 获取本年结束时间
/// </summary>
/// <param name="dateTime"></param>
/// <returns></returns>
public static DateTime GetYearEnd(this DateTime dateTime)
{
var time2 = dateTime.AddYears();
return DateTime.Parse(time2.AddDays(-time2.DayOfYear).ToString("yyyy/MM/dd 23:59:59"));
} /// <summary>
/// 北京时间转换成unix时间戳(10位/秒)
/// </summary>
/// <param name="dateTime"></param>
/// <returns></returns>
public static long BeijingTimeToUnixTimeStamp10(this DateTime dateTime)
{
return (long)(dateTime - new DateTime(, , , , , )).TotalSeconds;
} /// <summary>
/// 格林威治时间转换成unix时间戳(10位/秒)
/// </summary>
/// <param name="dateTime"></param>
/// <returns></returns>
public static long UtcTimeToUnixTimeStamp10(this DateTime dateTime)
{
return (long)(dateTime - new DateTime(, , , , , )).TotalSeconds;
} /// <summary>
/// 北京时间转换成unix时间戳(13位/毫秒)
/// </summary>
/// <param name="dateTime"></param>
/// <returns></returns>
public static long BeijingTimeToUnixTimeStamp13(this DateTime dateTime)
{
return (long)(dateTime - new DateTime(, , , , , )).TotalMilliseconds;
} /// <summary>
/// 格林威治时间转换成unix时间戳(13位/毫秒)
/// </summary>
/// <param name="dateTime"></param>
/// <returns></returns>
public static long UtcTimeToUnixTimeStamp13(this DateTime dateTime)
{
return (long)(dateTime - new DateTime(, , , , , )).TotalMilliseconds;
} /// <summary>
/// 10位unix时间戳转换成北京时间
/// </summary>
/// <param name="dateTime"></param>
/// <returns></returns>
public static DateTime UnixTimeStamp10ToBeijingTime(this long unixTimeStamp)
{
return new DateTime(, , , , , ).AddSeconds(unixTimeStamp);
} /// <summary>
/// 10位unix时间戳转换成格林威治
/// </summary>
/// <param name="dateTime"></param>
/// <returns></returns>
public static DateTime UnixTimeStamp10ToUtcTime(this long unixTimeStamp)
{
return new DateTime(, , , , , ).AddSeconds(unixTimeStamp);
} /// <summary>
/// 13位unix时间戳转换成北京时间
/// </summary>
/// <param name="dateTime"></param>
/// <returns></returns>
public static DateTime UnixTimeStamp13ToBeijingTime(this long unixTimeStamp)
{
return new DateTime(, , , , , ).AddMilliseconds(unixTimeStamp);
} /// <summary>
/// 13位unix时间戳转换成格林威治
/// </summary>
/// <param name="dateTime"></param>
/// <returns></returns>
public static DateTime UnixTimeStamp13ToUtcTime(this long unixTimeStamp)
{
return new DateTime(, , , , , ).AddMilliseconds(unixTimeStamp);
} /// <summary>
/// 当前日期所在月份第一个指定星期几的日期
/// </summary>
/// <param name="date">给定日期</param>
/// <param name="dayOfWeek">星期几</param>
/// <returns>所对应的日期</returns>
public static DateTime GetFirstWeekDayOfMonth(this DateTime date, DayOfWeek dayOfWeek)
{
var dt = date.GetMonthStart();
while (dt.DayOfWeek != dayOfWeek)
dt = dt.AddDays(); return dt;
} /// <summary>
/// 当前日期所在月份最后1个指定星期几的日期
/// </summary>
/// <param name="date">给定日期</param>
/// <param name="dayOfWeek">星期几</param>
/// <returns>所对应的日期</returns>
public static DateTime GetLastWeekDayOfMonth(this DateTime date, DayOfWeek dayOfWeek)
{
var dt = date.GetMonthEnd();
while (dt.DayOfWeek != dayOfWeek)
dt = dt.AddDays(-); return dt;
} /// <summary>
/// 判断是否比指定之间早
/// </summary>
/// <param name="date"></param>
/// <param name="other"></param>
/// <returns></returns>
public static bool IsBefore(this DateTime date, DateTime other)
{
return date < other;
} /// <summary>
/// 判断是否比指定时间晚
/// </summary>
/// <param name="date"></param>
/// <param name="other"></param>
/// <returns></returns>
public static bool IsAfter(this DateTime date, DateTime other)
{
return date > other;
} /// <summary>
/// 给定日期所在月份共有多少天
/// </summary>
/// <param name="date"></param>
/// <returns></returns>
public static int GetCountDaysOfMonth(this DateTime date)
{
return date.GetMonthEnd().Day;
} /// <summary>
/// 当前日期与给定日期是否是同一天
/// </summary>
/// <param name="date">当前日期</param>
/// <param name="dateToCompare">给定日期</param>
/// <returns></returns>
public static bool IsDateEqual(this DateTime date, DateTime dateToCompare)
{
return date.Date == dateToCompare.Date;
} /// <summary>
/// 是否是周未
/// </summary>
/// <param name="date"></param>
/// <returns></returns>
public static bool IsWeekend(this DateTime date)
{
return date.DayOfWeek == DayOfWeek.Saturday || date.DayOfWeek == DayOfWeek.Sunday;
} /// <summary>
/// 是否是工作日
/// </summary>
/// <param name="date"></param>
/// <returns></returns>
public static bool IsWeekDay(this DateTime date)
{
return !date.IsWeekend();
} /// <summary>
/// 判断是否为今天
/// </summary>
/// <param name="date"></param>
/// <returns></returns>
public static bool IsToday(this DateTime date)
{
return date.Date == DateTime.Now.Date;
} /// <summary>
/// 判定公历闰年遵循的一般规律为：四年一闰，百年不闰，四百年再闰。
/// 公历闰年的精确计算方法：（按一回归年365天5小时48分45.5秒）
/// 普通年能被4整除而不能被100整除的为闰年。（如2004年就是闰年，1900年不是闰年）
/// 世纪年能被400整除而不能被3200整除的为闰年。 (如2000年是闰年，3200年不是闰年)
/// 对于数值很大的年份能整除3200,但同时又能整除172800则又是闰年。(如172800年是闰年，86400年不是闰年）
/// 公元前闰年规则如下：
/// 非整百年：年数除4余数为1是闰年，即公元前1、5、9……年；
/// 整百年：年数除400余数为1是闰年，年数除3200余数为1，不是闰年,年数除172800余1又为闰年，即公元前401、801……年。
/// </summary>
/// <param name="dateTime"></param>
/// <returns></returns>
public static bool IsLeap(this DateTime dateTime)
{
var year = dateTime.Year;
if ((year % == && year % != )
|| (year % == && year % != )
|| (year % == && year % == ))
return true;
else
return false;
} /// <summary>
/// 获取当前年天数
/// </summary>
/// <param name="dateTime"></param>
/// <returns></returns>
public static int GetDaysByYear(this DateTime dateTime)
{
return (new DateTime(dateTime.Year + , , ) - new DateTime(dateTime.Year, , )).Days;
} /// <summary>
/// 获取当前年天数
/// </summary>
/// <param name="dateTime"></param>
/// <returns></returns>
public static int GetWeekCountByYear(this DateTime dateTime)
{
//找到今年的第一天是周几
int firstWeekend = Convert.ToInt32(DateTime.Parse(dateTime.Year + "-1-1").DayOfWeek); //获取第一周的差额,如果是周日，则firstWeekend为0，第一周也就是从周天开始的。
int weekDay = firstWeekend == ? : ( - firstWeekend + ); //获取今天是一年当中的第几天
int currentDay = dateTime.DayOfYear; //（今天减去第一周周末）/7 等于距第一周有多少周再加上第一周的1 就是今天是今年的第几周了
// 刚好考虑了惟一的特殊情况就是，今天刚好在第一周内，那么距第一周就是0 再加上第一周的1 最后还是1
int current_week = Convert.ToInt32(Math.Ceiling((currentDay - weekDay) / 7.0)) + ;
return current_week;
} }
}