/// <summary>
/// 与指定的时间计算时间差（date－theDate）
/// </summary>
/// <param name="theTime">被计算日期</param>
/// <param name="date">计算日期</param>
/// <param name="calcTime">是事计算时间部分，默认true</param>
/// <param name="calcHour">是否计算小时，默认true</param>
/// <param name="calcMinute">是否计算分，默认true</param>
/// <param name="calcSecond">是否计算秒，默认true</param>
/// <returns></returns>
public static TimeInfo GetTimeDiff(this DateTime theTime, DateTime date,
bool calcTime = true, bool calcHour = true, bool calcMinute = true, bool calcSecond = true)
{
var timeinfo = new TimeInfo();
timeinfo.Source = theTime;
timeinfo.Now = date;
DateTime?temp = null;
if (date < theTime)
{
temp = theTime;
theTime = date;
date = temp.Value;
}
#region 计算秒
if (calcSecond && calcTime)
{
timeinfo.Second = date.Second - theTime.Second;
if (timeinfo.Second < 0)
{
timeinfo.Second += 60;
timeinfo.Minute -= 1;
}
}
#endregion
#region 计算分
if (calcSecond && calcTime)
{
timeinfo.Minute += date.Minute - theTime.Minute;
if (timeinfo.Minute < 0)
{
timeinfo.Minute += 60;
timeinfo.Hour -= 1;
}
}
#endregion
#region 计算时
if (calcHour && calcTime)
{
timeinfo.Hour += date.Hour - theTime.Hour;
if (timeinfo.Hour < 0)
{
timeinfo.Hour += 24;
timeinfo.Day -= 1;
}
}
#endregion
#region 计算天
var theMonthDays = DateTime.DaysInMonth(theTime.Year, theTime.Month);
// 判断出生日期和计算日期是不是都是月份的最后一天
// 出生月总天数大于当前月总天数的月底做满月处理,
// 如: 2000-03-31 到 2000-04-30 做为满月，5月份则要31号才做为满月,不计算天数
if (!(theTime.Day + timeinfo.Day == theMonthDays && date.Day == DateTime.DaysInMonth(date.Year, date.Month)))
{
timeinfo.Day += date.Day - theTime.Day;
}
if (timeinfo.Day < 0)
{
var nowPrevMonth = date.AddMonths(-1); // 当前日期上月日期
var prevMonthDays = DateTime.DaysInMonth(nowPrevMonth.Year, nowPrevMonth.Month);
// 如果借过来的月的总天数小于被减月份的总天数，则以被减月份的总天数为准
// 如: 2013-01-20 到 2013-03-10 , 此时借的是2月份, 小于出生月1月份的总天数,则天数为 10-20+31=21天
timeinfo.Day += Math.Max(prevMonthDays, theMonthDays);
timeinfo.Month -= 1;
}
#endregion
#region 计算月
timeinfo.Month += date.Month - theTime.Month;
if (timeinfo.Month < 0) // 月数不足借年
{
timeinfo.Month += 12;
timeinfo.Year -= 1;
}
#endregion
#region 计算年
timeinfo.Year += date.Year - theTime.Year;
#endregion
if (temp.HasValue)
{
timeinfo.Second *= -1;
timeinfo.Minute *= -1;
timeinfo.Hour *= -1;
timeinfo.Day *= -1;
timeinfo.Month *= -1;
timeinfo.Year *= -1;
}
return(timeinfo);
}
/// <summary>
/// 与指定的时间计算时间差（date－theDate）
/// </summary>
/// <param name="theTime">被计算日期</param>
/// <param name="date">计算日期</param>
/// <param name="calcTime">是事计算时间部分，默认true</param>
/// <param name="calcHour">是否计算小时，默认true</param>
/// <param name="calcMinute">是否计算分，默认true</param>
/// <param name="calcSecond">是否计算秒，默认true</param>
/// <returns></returns>
public static TimeInfo GetTimeDiff(this DateTime theTime, DateTime date,
bool calcTime = true, bool calcHour = true, bool calcMinute = true, bool calcSecond = true)
{
var timeinfo = new TimeInfo();
timeinfo.Source = theTime;
timeinfo.Now = date;
DateTime? temp = null;
if (date < theTime)
{
temp = theTime;
theTime = date;
date = temp.Value;
}
#region 计算秒
if (calcSecond && calcTime)
{
timeinfo.Second = date.Second - theTime.Second;
if (timeinfo.Second < 0)
{
timeinfo.Second += 60;
timeinfo.Minute -= 1;
}
}
#endregion
#region 计算分
if (calcSecond && calcTime)
{
timeinfo.Minute += date.Minute - theTime.Minute;
if (timeinfo.Minute < 0)
{
timeinfo.Minute += 60;
timeinfo.Hour -= 1;
}
}
#endregion
#region 计算时
if (calcHour && calcTime)
{
timeinfo.Hour += date.Hour - theTime.Hour;
if (timeinfo.Hour < 0)
{
timeinfo.Hour += 24;
timeinfo.Day -= 1;
}
}
#endregion
#region 计算天
var theMonthDays = DateTime.DaysInMonth(theTime.Year, theTime.Month);
// 判断出生日期和计算日期是不是都是月份的最后一天
// 出生月总天数大于当前月总天数的月底做满月处理,
// 如: 2000-03-31 到 2000-04-30 做为满月，5月份则要31号才做为满月,不计算天数
if (!(theTime.Day + timeinfo.Day == theMonthDays && date.Day == DateTime.DaysInMonth(date.Year, date.Month)))
{
timeinfo.Day += date.Day - theTime.Day;
}
if (timeinfo.Day < 0)
{
var nowPrevMonth = date.AddMonths(-1); // 当前日期上月日期
var prevMonthDays = DateTime.DaysInMonth(nowPrevMonth.Year, nowPrevMonth.Month);
// 如果借过来的月的总天数小于被减月份的总天数，则以被减月份的总天数为准
// 如: 2013-01-20 到 2013-03-10 , 此时借的是2月份, 小于出生月1月份的总天数,则天数为 10-20+31=21天
timeinfo.Day += Math.Max(prevMonthDays, theMonthDays);
timeinfo.Month -= 1;
}
#endregion
#region 计算月
timeinfo.Month += date.Month - theTime.Month;
if (timeinfo.Month < 0) // 月数不足借年
{
timeinfo.Month += 12;
timeinfo.Year -= 1;
}
#endregion
#region 计算年
timeinfo.Year += date.Year - theTime.Year;
#endregion
if (temp.HasValue)
{
timeinfo.Second *= -1;
timeinfo.Minute *= -1;
timeinfo.Hour *= -1;
timeinfo.Day *= -1;
timeinfo.Month *= -1;
timeinfo.Year *= -1;
}
return timeinfo;
}
