在Universal Apps中的日历之间进行转换

时间:2015-11-01 01:21:34

标签: c# datetime calendar win-universal-app

通用Windows平台(UWP)DateTime似乎不支持DateTime(link)的这个构造函数。

  

DateTime构造函数(Int32,Int32,Int32,日历)

我正在编写的应用程序的核心功能是在不同的日历格式(例如gregorian,hijri,希伯来语)之间转换DateTimes,之前我依靠该构造函数来执行转换。

知道如何在通用应用程序上执行日期转换,因为这个ctor丢失了吗?例如将Hijri /希伯来日期转换为Greogiran?

-Tariq

1 个答案:

答案 0 :(得分:1)

如果要使用.NET类,这些是ToDateTime类中的Calendar方法,用于将该日历中的日期转换为DateTime(Gregorian):

int persianYear = 1394;
int persianMonth = 8;
int persianDay = 10;

var persianCalendar = new System.Globalization.PersianCalendar();
DateTime gregDateTime = persianCalendar.ToDateTime(persianYear, persianMonth, persianDay, 0, 0, 0, 0);
Debug.WriteLine(
   string.Format(
      "{0}/{1}/{2} in persian is {3}/{4}/{5} in gregorian",
      persianYear,
      persianMonth,
      persianDay,
      gregDateTime.Year,
      gregDateTime.Month,
      gregDateTime.Day
   ));

输出:

  波斯语中的1394/8/10是gregorian的2015/11/1

还有GetYear,GetMonth和类似的方法可以转换回来。

但是如果您想使用Windows运行时类(推荐),Calendar类可以通过ChangeCalendarSystem方法进行转换。您可以使用年,月和日属性来获取和设置日期组件。

以下是一个示例转换方法,它将日历组件从日历系统转换为另一个:

private void ConvertDate(
   string from,
   int year,
   int month,
   int day, 
   string to,
   out int convertedYear,
   out int convertedMonth,
   out int convertedDay) {

   Calendar calendar = new Calendar();
   calendar.ChangeCalendarSystem(from);
   calendar.Year = year;
   calendar.Month = month;
   calendar.Day = day;
   calendar.ChangeCalendarSystem(to);
   convertedYear = calendar.Year;
   convertedMonth = calendar.Month;
   convertedDay = calendar.Day;
}

使用该方法将波斯语转换为Hijri和Hijri为Gregorian的示例:

int persianYear = 1394;
int persianMonth = 8;
int persianDay = 10;

int hijriYear;
int hijriMonth;
int hijriDay;

ConvertDate(
   CalendarIdentifiers.Persian,
   persianYear,
   persianMonth,
   persianDay,
   CalendarIdentifiers.Hijri,
   out hijriYear,
   out hijriMonth,
   out hijriDay);

Debug.WriteLine(
   string.Format(
      "{0}/{1}/{2} in Persian is {3}/{4}/{5} in Hijri",
      persianYear,
      persianMonth,
      persianDay,
      hijriYear,
      hijriMonth,
      hijriDay
   ));

int gregYear;
int gregMonth;
int gregDay;

ConvertDate(
   CalendarIdentifiers.Hijri,
   hijriYear,
   hijriMonth,
   hijriDay,
   CalendarIdentifiers.Gregorian,
   out gregYear,
   out gregMonth,
   out gregDay);

Debug.WriteLine(
   string.Format(
      "{0}/{1}/{2} in Hijri is {3}-{4}-{5} in Gregorian",
      hijriYear,
      hijriMonth,
      hijriDay,
      gregYear,
      gregMonth,
      gregDay
   ));

输出:

  

1394/8/10波斯语是Hijri的1437/1/19

     在Hijri的1437/1/19是格里高利的2015/11/1