Question

我有一个类型为 DateTime 的对象，如下所示：

var date = new DateTime(1999,1,18);

然后我用这样的 fa-IR 文化信息调用 ToString 方法：

var strDate = date.ToString("yyyy/MM/dd",CultureInfo.GetCultureInfo("fa-IR"));

我希望 strDate 为“ 1377/10/28” ，相当于 “ 1999/1/18” > fa-IR 文化。但是在调用ToString方法后，我得到“ 1999/1/18” ，这不是true。

任何人都知道问题出在哪里以及如何解决？

Answer 1

您需要覆盖文化日历，并且要接收波斯语名称，也需要覆盖它们。...

或多或少是这样的：

using System;
using System.Collections.Generic;
using System.Globalization;
using System.Reflection;

namespace Ravis24.Helpers
{
    public class PersianCulture : CultureInfo
    {
        private readonly System.Globalization.Calendar cal;
        private readonly System.Globalization.Calendar[] optionals;

        public PersianCulture()
            : this("fa-IR", true)
        { }

        public PersianCulture(string cultureName, bool useUserOverride)
            : base(cultureName, useUserOverride)
        {
            cal = base.OptionalCalendars[0];
            var optionalCalendars = new List<System.Globalization.Calendar>();
            optionalCalendars.AddRange(base.OptionalCalendars);
            optionalCalendars.Insert(0, new PersianCalendar());
            Type formatType = typeof(DateTimeFormatInfo);
            Type calendarType = typeof(System.Globalization.Calendar);
            PropertyInfo idProperty = calendarType.GetProperty("ID", BindingFlags.Instance | BindingFlags.NonPublic);
            FieldInfo optionalCalendarfield = formatType.GetField("optionalCalendars", BindingFlags.Instance | BindingFlags.NonPublic);
            var newOptionalCalendarIDs = new Int32[optionalCalendars.Count];

            for (int i = 0; i < newOptionalCalendarIDs.Length; i++)
                newOptionalCalendarIDs[i] = (Int32)idProperty.GetValue(optionalCalendars[i], null);

            optionalCalendarfield.SetValue(DateTimeFormat, newOptionalCalendarIDs);

            optionals = optionalCalendars.ToArray();

            cal = optionals[0];

            DateTimeFormat.Calendar = optionals[0];

            DateTimeFormat.MonthNames = new[] { "فروردین", "اردیبهشت", "خرداد", "تیر", "مرداد", "شهریور", "مهر", "آبان", "آذر", "دی", "بهمن", "اسفند", "" };
            DateTimeFormat.MonthGenitiveNames = new[] { "فروردین", "اردیبهشت", "خرداد", "تیر", "مرداد", "شهریور", "مهر", "آبان", "آذر", "دی", "بهمن", "اسفند", "" };
            DateTimeFormat.AbbreviatedMonthNames = new[] { "فروردین", "اردیبهشت", "خرداد", "تیر", "مرداد", "شهریور", "مهر", "آبان", "آذر", "دی", "بهمن", "اسفند", "" };
            DateTimeFormat.AbbreviatedMonthGenitiveNames = new[] { "فروردین", "اردیبهشت", "خرداد", "تیر", "مرداد", "شهریور", "مهر", "آبان", "آذر", "دی", "بهمن", "اسفند", "" };
            DateTimeFormat.AbbreviatedDayNames = new string[] { "ی", "د", "س", "چ", "پ", "ج", "ش" };
            DateTimeFormat.ShortestDayNames = new string[] { "ی", "د", "س", "چ", "پ", "ج", "ش" };
            DateTimeFormat.DayNames = new string[] { "یکشنبه", "دوشنبه", "ﺳﻪشنبه", "چهارشنبه", "پنجشنبه", "جمعه", "شنبه" };
            DateTimeFormat.AMDesignator = "ق.ظ";
            DateTimeFormat.PMDesignator = "ب.ظ";
            DateTimeFormat.ShortDatePattern = "yyyy/MM/dd";
            DateTimeFormat.ShortTimePattern = "HH:mm";
            DateTimeFormat.LongTimePattern = "HH:mm:ss";
            DateTimeFormat.FullDateTimePattern = "yyyy/MM/dd HH:mm:ss";
        }

        public override System.Globalization.Calendar Calendar
        {
            get { return cal; }
        }

        public override System.Globalization.Calendar[] OptionalCalendars
        {
            get { return optionals; }
        }

        public static DateTime PersianToGregorianUS(DateTime faDate)
        {
            return new PersianCalendar().ToDateTime(faDate.Year, faDate.Month, faDate.Day, faDate.Hour, faDate.Minute, faDate.Second, faDate.Millisecond);
        }
    }
}

Answer 2

尝试一下：

Thread.CurrentThread.CurrentUICulture = new CultureInfo("fa-IR");
var date = new DateTime(1999, 1, 18);
var strDate = date.ToString("yyyy/MM/dd", CultureInfo.GetCultureInfo("fa-IR"));

Console.WriteLine(strDate);
Console.ReadKey();

这将给出输出“ 1377/10/28”

使用特定区域性调用DateTime的ToString方法

2 个答案: