如何将波斯日期转换为格里高利日期？
我使用下面的函数将格里高利日期转换为波斯日期，但我一直无法编写函数来进行反向转换。 我想要一个将波斯日期（像“1390/07/18 12:00:00”这样的字符串）转换为格鲁吉亚日期的函数。
public static string GetPdate(DateTime _EnDate) { PersianCalendar pcalendar = new PersianCalendar(); string Pdate = pcalendar.GetYear(_EnDate).ToString("0000") + "/" + pcalendar.GetMonth(_EnDate).ToString("00") + "/" + pcalendar.GetDayOfMonth(_EnDate).ToString("00") + " " + pcalendar.GetHour(_EnDate).ToString("00") + ":" + pcalendar.GetMinute(_EnDate).ToString("00") + ":" + pcalendar.GetSecond(_EnDate).ToString("00"); return Pdate; } DateTime 总是在格里高利历中，有效。 即使您创建了指定不同日历的实例， Day ， Month ， Year等属性返回的值也在Gregorian日历中。
举个例子，开始伊斯兰历法：
using System; using System.Globalization; class Test { static void Main() { DateTime epoch = new DateTime(1, 1, 1, new HijriCalendar()); Console.WriteLine(epoch.Year); // 622 Console.WriteLine(epoch.Month); // 7 Console.WriteLine(epoch.Day); // 18 } }
目前尚不清楚如何创建此方法的输入，或者您是否应该将其转换为字符串格式。 （或者为什么你没有使用内置的字符串格式化程序。）
可能你可以使用：
public static string FormatDateTimeAsGregorian(DateTime input) { return input.ToString("yyyy'/'MM'/'dd' 'HH':'mm':'ss", CultureInfo.InvariantCulture); }
这适用于任何已正确创建的DateTime – 但我们不知道你在此之前做了什么。
样品：
using System; using System.Globalization; class Test { static void Main() { DateTime epoch = new DateTime(1, 1, 1, new PersianCalendar()); // Prints 0622/03/21 00:00:00 Console.WriteLine(FormatDateTimeAsGregorian(epoch)); } public static string FormatDateTimeAsGregorian(DateTime input) { return input.ToString("yyyy'/'MM'/'dd' 'HH':'mm':'ss", CultureInfo.InvariantCulture); } }
现在，如果您在创建DateTime时未指定日历，那么您根本就不会创建波斯日期。
如果您想要跟踪日历系统的日期，可以使用现在支持波斯日历的Noda Time项目：
// In Noda Time 2.0 you'd just use CalendarSystem.Persian var persianDate = new LocalDate(1390, 7, 18, CalendarSystem.GetPersianCalendar()); var gregorianDate = persianDate.WithCalendar(CalendarSystem.Iso);
谢谢大家，我使用下面的代码，我的问题解决了：
public static DateTime GetEdate(string _Fdate) { DateTime fdate = Convert.ToDateTime(_Fdate); GregorianCalendar gcalendar = new GregorianCalendar(); DateTime eDate = pcalendar.ToDateTime( gcalendar.GetYear(fdate), gcalendar.GetMonth(fdate), gcalendar.GetDayOfMonth(fdate), gcalendar.GetHour(fdate), gcalendar.GetMinute(fdate), gcalendar.GetSecond(fdate), 0); return eDate; }
1-首次安装Persiandate NuGet包 （17KB）
Install-Package PersianDate
2-使用ToFa和toEn PersianDate类的静态方法（不要担心库本身将处理的分隔符和方向，如下面的示例所示。也可以在GitHub中找到Usage Console项目来测试它很容易）：
//default format string dts=ConvertDate.ToFa(DateTime.Now);//1393/08/01 //date only (short and D for Long) dts=ConvertDate.ToFa(DateTime.Now, "d");//93/08/01 dts=ConvertDate.ToFa(DateTime.Now, "D");//پنج شنبه, 01 آبان 1393 //time only dts=ConvertDate.ToFa(DateTime.Now, "t");//21:53 dts=ConvertDate.ToFa(DateTime.Now, "T");//21:53:26 //general short date + time dts=ConvertDate.ToFa(DateTime.Now, "g");//93/08/01 21:53 dts=ConvertDate.ToFa(DateTime.Now, "G");//93/08/01 21:53:26 //general full date + time dts=ConvertDate.ToFa(DateTime.Now, "f");//پنج شنبه, 01 آبان 1393 21:53 dts=ConvertDate.ToFa(DateTime.Now, "F");//پنج شنبه, 01 آبان 1393 21:53:26 //only month and year dts=ConvertDate.ToFa(DateTime.Now, "m");//آبان 1 dts=ConvertDate.ToFa(DateTime.Now, "y");//1393 آبان dts=ConvertDate.ToFa(DateTime.Now);//1393/08/01 // converting back to Gregorian date Datetime dt= ConvertDate.ToEn(dts);//2014/10/23 00:00:00
3- GitHub中提供的源代码，用于任何修改和支持新格式。
寻找以下函数源代码，看看它是如何工作的
public static DateTime ToEn(string fadate) { if (fadate.Trim() == "") return DateTime.MinValue; int[] farsiPartArray = SplitRoozMahSalNew(fadate); return new PersianCalendar().ToDateTime(farsiPartArray[0], farsiPartArray[1], farsiPartArray[2], 0, 0, 0, 0); } private static int[] SplitRoozMahSalNew(string farsiDate) { int pYear = 0; int pMonth = 0; int pDay = 0; //normalize with one character farsiDate = farsiDate.Trim().Replace(@"\", "/").Replace(@"-", "/").Replace(@"_", "/"). Replace(@",", "/").Replace(@".", "/").Replace(@" ", "/"); string[] rawValues = farsiDate.Split(new[] { '/' }, StringSplitOptions.RemoveEmptyEntries); if (!farsiDate.Contains("/")) { if (rawValues.Length != 2) throw new Exception("usually there should be 2 seperator for a complete date"); } else //mostly given in all numeric format like 13930316 { // detect year side and add slashes in right places and continue } //new simple method which emcompass below methods too try { pYear = int.Parse(rawValues[0].TrimStart(new[] { '0' }).Trim()); pMonth = int.Parse(rawValues[1].TrimStart(new[] { '0' }).Trim()); pDay = int.Parse(rawValues[2].TrimStart(new[] { '0' }).Trim()); // the year usually must be larger than 90 //or for historic values rarely lower than 33 if 2 digit is given if (pYear < 33 && pYear > 0) { //swap year and day pYear = pDay; pDay = int.Parse(rawValues[0]); //convert again } //fix 2 digits of persian strings if (pYear.ToString(CultureInfo.InvariantCulture).Length == 2) pYear = pYear + 1300; // if (pMonth <= 0 || pMonth >= 13) throw new Exception("mahe shamsi must be under 12 "); } catch (Exception ex) { throw new Exception( "invalid Persian date format: maybe all 3 numric Sal, Mah,rooz parts are not present. \r\n" + ex); } return new[] { pYear, pMonth, pDay }; }
使用此代码将波斯语转换为格里高利日期，反之亦然。
public static class PersainDate { public static DateTime ConvertToGregorian(this DateTime obj) { DateTime dt = new DateTime(obj.Year, obj.Month, obj.Day, new PersianCalendar()); return dt; } public static DateTime ConvertToPersian(this DateTime obj) { var persian = new PersianCalendar(); var year = persian.GetYear(obj); var month = persian.GetMonth(obj); var day = persian.GetDayOfMonth(obj); DateTime persiandate = new DateTime(year, month, day); return persianDate; } }
以这种方式使用代码
var time = DateTime.Now; var persianDate = time.ConverToPersian(); var gregorianDate = persianDate.ConverToGregorian();
You may try with this: using System.Globalization // namespace GregorianCalendar greg = new GregorianCalendar(); DateTime DayYearMonth = new DateTime(1433, 10, 11, greg ); Console.WriteLine(greg .GetDayOfMonth(DayYearMonth )); // 11 Console.WriteLine(greg .GetYear(DayYearMonth )); // 1433 Console.WriteLine(greg .GetMonth(DayYearMonth )); // 10
此方法将表示shamsi日期的字符串转换为System.DateTime：
public DateTime milady(string shamsiDate) { DateTime dt = new DateTime(); PersianCalendar pc = new PersianCalendar(); int pYear = Convert.ToInt32(shamsiDate.Substring(0, 4)); int pMonth =Convert.ToInt32(shamsiDate.Substring(5, 2)); int pDay = Convert.ToInt32( shamsiDate.Substring(8)); dt = pc.ToDateTime(pYear, pMonth, pDay,0,0,0,0); return dt; }
这种方法检查闰年。
private static DateTime JalaliToGregorianDate(string jalaliDate) { string[] JalaliDateArray = jalaliDate.Split(new Char[] { '/' }); int Year, Mounth, Day; DateTime GregorianDate; PersianCalendar persianCalendar = new PersianCalendar(); // Year = int.Parse(JalaliDateArray[2]); if (Year < 100) { Year = 1300 + Year; } Mounth = int.Parse(JalaliDateArray[1]); Day = int.Parse(JalaliDateArray[0]); if (Day > 29 && Mounth == 12) { if (!persianCalendar.IsLeapYear(Year)) { throw (new Exception(string.Format("IsNotLeapYear&{0}", Year))); } } GregorianDate = persianCalendar.ToDateTime(Year, Mounth, Day, 0, 0, 0, 0); // return GregorianDate; }
您可以使用Nuget使用PersianDateTime：
PM> Install-Package PersianDateTime
以及如何使用：
DateTime miladiDate = new DateTime(2013, 5, 31); PersianDateTime persianDate = new PersianDateTime(miladiDate);
和：
PersianDateTime persianDate = PersianDateTime.Parse("1392/03/02"); DateTime miladiDate = persianDate.ToDateTime();
for： 关于PersianDateTime的更多信息