C#.NET DateTime扩展 GetTimeSpan/ToDateTime/CalculateAge/ToAgo/DateDiff
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Reflection;
using System.Data;
using System.Data.Common;
using System.Web.Script.Serialization;
using System.Globalization;
using Microsoft.VisualBasic;
namespace Pub.Class {
public static class DateExtensions {
private static readonly TimeSpan _OneMinute = new TimeSpan(0, 1, 0);
private static readonly TimeSpan _TwoMinutes = new TimeSpan(0, 2, 0);
private static readonly TimeSpan _OneHour = new TimeSpan(1, 0, 0);
private static readonly TimeSpan _TwoHours = new TimeSpan(2, 0, 0);
private static readonly TimeSpan _OneDay = new TimeSpan(1, 0, 0, 0);
private static readonly TimeSpan _TwoDays = new TimeSpan(2, 0, 0, 0);
private static readonly TimeSpan _OneWeek = new TimeSpan(7, 0, 0, 0);
private static readonly TimeSpan _TwoWeeks = new TimeSpan(14, 0, 0, 0);
private static readonly TimeSpan _OneMonth = new TimeSpan(31, 0, 0, 0);
private static readonly TimeSpan _TwoMonths = new TimeSpan(62, 0, 0, 0);
private static readonly TimeSpan _OneYear = new TimeSpan(365, 0, 0, 0);
private static readonly TimeSpan _TwoYears = new TimeSpan(730, 0, 0, 0);
public static TimeSpan GetTimeSpan(this DateTime startTime, DateTime endTime) {
return endTime - startTime;
}
public static string ToDateTime(this DateTime time) {
return time.ToString("yyyy-MM-dd HH:mm:ss");
}
public static string ToDateTimeF(this DateTime time) {
return time.ToString("yyyy-MM-dd HH:mm:ss:fffffff");
}
public static int CalculateAge(this DateTime dateOfBirth) {
return CalculateAge(dateOfBirth, DateTime.Today);
}
public static int CalculateAge(this DateTime dateOfBirth, DateTime referenceDate) {
int years = referenceDate.Year - dateOfBirth.Year;
if(referenceDate.Month < dateOfBirth.Month || (referenceDate.Month == dateOfBirth.Month && referenceDate.Day < dateOfBirth.Day)) --years;
return years;
}
public static int GetCountDaysOfMonth(this DateTime date) {
var nextMonth = date.AddMonths(1);
return new DateTime(nextMonth.Year, nextMonth.Month, 1).AddDays(-1).Day;
}
public static DateTime GetFirstDayOfMonth(this DateTime date) {
return new DateTime(date.Year, date.Month, 1);
}
public static DateTime GetFirstDayOfMonth(this DateTime date, DayOfWeek dayOfWeek) {
var dt = date.GetFirstDayOfMonth();
while(dt.DayOfWeek != dayOfWeek) {
dt = dt.AddDays(1);
}
return dt;
}
public static DateTime GetLastDayOfMonth(this DateTime date) {
return new DateTime(date.Year, date.Month, GetCountDaysOfMonth(date));
}
public static DateTime GetLastDayOfMonth(this DateTime date, DayOfWeek dayOfWeek) {
var dt = date.GetLastDayOfMonth();
while(dt.DayOfWeek != dayOfWeek) {
dt = dt.AddDays(-1);
}
return dt;
}
public static bool IsToday(this DateTime dt) {
return (dt.Date == DateTime.Today);
}
public static bool IsToday(this DateTimeOffset dto) {
return (dto.Date.IsToday());
}
public static DateTime SetTime(this DateTime date, int hours, int minutes, int seconds) {
return date.SetTime(new TimeSpan(hours, minutes, seconds));
}
public static DateTime SetTime(this DateTime date, TimeSpan time) {
return date.Date.Add(time);
}
public static DateTimeOffset ToDateTimeOffset(this DateTime localDateTime) {
return localDateTime.ToDateTimeOffset(null);
}
public static DateTimeOffset ToDateTimeOffset(this DateTime localDateTime, TimeZoneInfo localTimeZone) {
localTimeZone = (localTimeZone ?? TimeZoneInfo.Local);
if(localDateTime.Kind != DateTimeKind.Unspecified) {
localDateTime = new DateTime(localDateTime.Ticks, DateTimeKind.Unspecified);
}
return TimeZoneInfo.ConvertTimeToUtc(localDateTime, localTimeZone);
}
public static DateTime GetFirstDayOfWeek(this DateTime date) {
return date.GetFirstDayOfWeek(null);
}
public static DateTime GetFirstDayOfWeek(this DateTime date, CultureInfo cultureInfo) {
cultureInfo = (cultureInfo ?? CultureInfo.CurrentCulture);
var firstDayOfWeek = cultureInfo.DateTimeFormat.FirstDayOfWeek;
while(date.DayOfWeek != firstDayOfWeek) date = date.AddDays(-1);
return date;
}
public static DateTime GetLastDayOfWeek(this DateTime date) {
return date.GetLastDayOfWeek(null);
}
public static DateTime GetLastDayOfWeek(this DateTime date, CultureInfo cultureInfo) {
return date.GetFirstDayOfWeek(cultureInfo).AddDays(6);
}
public static DateTime GetWeekday(this DateTime date, DayOfWeek weekday) {
return date.GetWeekday(weekday, null);
}
public static DateTime GetWeekday(this DateTime date, DayOfWeek weekday, CultureInfo cultureInfo) {
var firstDayOfWeek = date.GetFirstDayOfWeek(cultureInfo);
return firstDayOfWeek.GetNextWeekday(weekday);
}
public static DateTime GetNextWeekday(this DateTime date, DayOfWeek weekday) {
while(date.DayOfWeek != weekday) date = date.AddDays(1);
return date;
}
public static DateTime GetPreviousWeekday(this DateTime date, DayOfWeek weekday) {
while(date.DayOfWeek != weekday) date = date.AddDays(-1);
return date;
}
public static DateTimeOffset SetTime(this DateTimeOffset date, int hours, int minutes, int seconds) {
return date.SetTime(new TimeSpan(hours, minutes, seconds));
}
public static DateTimeOffset SetTime(this DateTimeOffset date, TimeSpan time) {
return date.SetTime(time, null);
}
public static DateTimeOffset SetTime(this DateTimeOffset date, TimeSpan time, TimeZoneInfo localTimeZone) {
var localDate = date.ToLocalDateTime(localTimeZone);
localDate.SetTime(time);
return localDate.ToDateTimeOffset(localTimeZone);
}
public static DateTime ToLocalDateTime(this DateTimeOffset dateTimeUtc) {
return dateTimeUtc.ToLocalDateTime(null);
}
public static DateTime ToLocalDateTime(this DateTimeOffset dateTimeUtc, TimeZoneInfo localTimeZone) {
localTimeZone = (localTimeZone ?? TimeZoneInfo.Local);
return TimeZoneInfo.ConvertTime(dateTimeUtc, localTimeZone).DateTime;
}
public static string ToAgo(this DateTime date) {
TimeSpan timeSpan = date.GetTimeSpan(DateTime.Now);
if (timeSpan < TimeSpan.Zero) return "未来";
if (timeSpan < _OneMinute) return "现在";
if (timeSpan < _TwoMinutes) return "1 分钟前";
if (timeSpan < _OneHour) return String.Format("{0} 分钟前", timeSpan.Minutes);
if (timeSpan < _TwoHours) return "1 小时前";
if (timeSpan < _OneDay) return String.Format("{0} 小时前", timeSpan.Hours);
if (timeSpan < _TwoDays) return "昨天";
if (timeSpan < _OneWeek) return String.Format("{0} 天前", timeSpan.Days);
if (timeSpan < _TwoWeeks) return "1 周前";
if (timeSpan < _OneMonth) return String.Format("{0} 周前", timeSpan.Days / 7);
if (timeSpan < _TwoMonths) return "1 月前";
if (timeSpan < _OneYear) return String.Format("{0} 月前", timeSpan.Days / 31);
if (timeSpan < _TwoYears) return "1 年前";
return String.Format("{0} 年前", timeSpan.Days / 365);
}
public static int WeekOfYear(this DateTime datetime) {
System.Globalization.DateTimeFormatInfo dateinf = new System.Globalization.DateTimeFormatInfo();
System.Globalization.CalendarWeekRule weekrule = dateinf.CalendarWeekRule;
DayOfWeek firstDayOfWeek = dateinf.FirstDayOfWeek;
return WeekOfYear(datetime, weekrule, firstDayOfWeek);
}
public static int WeekOfYear(this DateTime datetime, System.Globalization.CalendarWeekRule weekrule) {
System.Globalization.DateTimeFormatInfo dateinf = new System.Globalization.DateTimeFormatInfo();
DayOfWeek firstDayOfWeek = dateinf.FirstDayOfWeek;
return WeekOfYear(datetime, weekrule, firstDayOfWeek);
}
public static int WeekOfYear(this DateTime datetime, DayOfWeek firstDayOfWeek) {
System.Globalization.DateTimeFormatInfo dateinf = new System.Globalization.DateTimeFormatInfo();
System.Globalization.CalendarWeekRule weekrule = dateinf.CalendarWeekRule;
return WeekOfYear(datetime, weekrule, firstDayOfWeek);
}
public static int WeekOfYear(this DateTime datetime, System.Globalization.CalendarWeekRule weekrule, DayOfWeek firstDayOfWeek) {
System.Globalization.CultureInfo ciCurr = System.Globalization.CultureInfo.CurrentCulture;
return ciCurr.Calendar.GetWeekOfYear(datetime, weekrule, firstDayOfWeek);
}
public static long DateDiff(this DateTime value, DateTime date, DateInterval interval) {
if (interval == DateInterval.Year) return date.Year - value.Year;
if (interval == DateInterval.Month) return (date.Month - value.Month) + (12 * (date.Year - value.Year));
TimeSpan ts = date - value;
if (interval == DateInterval.Day || interval == DateInterval.DayOfYear) return ts.TotalDays.Round();
if (interval == DateInterval.Hour) return ts.TotalHours.Round();
if (interval == DateInterval.Minute) return ts.TotalMinutes.Round();
if (interval == DateInterval.Second) return ts.TotalSeconds.Round();
if (interval == DateInterval.Weekday) return (ts.TotalDays / 7.0).Round();
if (interval == DateInterval.WeekOfYear) {
while (date.DayOfWeek != DateTimeFormatInfo.CurrentInfo.FirstDayOfWeek) date = date.AddDays(-1);
while (value.DayOfWeek != DateTimeFormatInfo.CurrentInfo.FirstDayOfWeek) value = value.AddDays(-1);
ts = date - value;
return (ts.TotalDays / 7.0).Round();
}
if (interval == DateInterval.Quarter) {
double valueQuarter = GetQuarter(value.Month);
double dateQuarter = GetQuarter(date.Month);
double valueDiff = dateQuarter - valueQuarter;
double dateDiff = 4 * (date.Year - value.Year);
return (valueDiff + dateDiff).Round();
}
return 0;
}
public static int GetQuarter(int month) {
if (month <= 3) return 1;
if (month <= 6) return 2;
if (month <= 9) return 3;
return 4;
}
public static bool IsWeekDay(this DateTime date) {
return !date.IsWeekend();
}
public static bool IsWeekend(this DateTime value) {
return value.DayOfWeek == DayOfWeek.Sunday || value.DayOfWeek == DayOfWeek.Saturday;
}
private static long DateDiff(this DateInterval interval, DateTime date1, DateTime date2) {
if (interval == DateInterval.Year) return date2.Year - date1.Year;
if (interval == DateInterval.Month) return (date2.Month - date1.Month) + (12 * (date2.Year - date1.Year));
TimeSpan ts = date2 - date1;
if (interval == DateInterval.Day || interval == DateInterval.DayOfYear) return ts.TotalDays.Round();
if (interval == DateInterval.Hour) return ts.TotalHours.Round();
if (interval == DateInterval.Minute) return ts.TotalMinutes.Round();
if (interval == DateInterval.Second) return ts.TotalSeconds.Round();
if (interval == DateInterval.Weekday) return (ts.TotalDays / 7.0).Round();
if (interval == DateInterval.WeekOfYear) {
while (date2.DayOfWeek != DateTimeFormatInfo.CurrentInfo.FirstDayOfWeek)
date2 = date2.AddDays(-1);
while (date1.DayOfWeek != DateTimeFormatInfo.CurrentInfo.FirstDayOfWeek)
date1 = date1.AddDays(-1);
ts = date2 - date1;
return (ts.TotalDays / 7.0).Round();
}
if (interval == DateInterval.Quarter) {
double date1Quarter = GetQuarter(date1.Month);
double date2Quarter = GetQuarter(date2.Month);
double date1Diff = date2Quarter - date1Quarter;
double date2Diff = 4 * (date2.Year - date1.Year);
return (date1Diff + date2Diff).Round();
}
return 0;
}
}
}
开源：
https://github.com/hcxiong 欢迎收藏:)
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