internal static DateTimeFormatInfo GetDateFormat(CultureInfo culture)
{
// Check for persian first
if (culture.LCID == 1065)
{
return(PersianCalendarHelper.GetDateTimeFormatInfo());
}
if (culture.Calendar is GregorianCalendar)
{
return(culture.DateTimeFormat);
}
else
{
GregorianCalendar foundCal = null;
DateTimeFormatInfo dtfi = null;
foreach (System.Globalization.Calendar cal in culture.OptionalCalendars)
{
if (cal is GregorianCalendar)
{
// Return the first Gregorian calendar with CalendarType == Localized
// Otherwise return the first Gregorian calendar
if (foundCal == null)
{
foundCal = cal as GregorianCalendar;
}
if (((GregorianCalendar)cal).CalendarType == GregorianCalendarTypes.Localized)
{
foundCal = cal as GregorianCalendar;
break;
}
}
}
if (foundCal == null)
{
// if there are no GregorianCalendars in the OptionalCalendars list, use the invariant dtfi
dtfi = ((CultureInfo)CultureInfo.InvariantCulture.Clone()).DateTimeFormat;
dtfi.Calendar = new GregorianCalendar();
}
else
{
dtfi = ((CultureInfo)culture.Clone()).DateTimeFormat;
dtfi.Calendar = foundCal;
}
return(dtfi);
}
}
public static string ToLongDateString(DateTime?date, CultureInfo culture)
{
string result = string.Empty;
DateTimeFormatInfo format = GetDateFormat(culture);
if (date.HasValue && format != null)
{
//result = date.Value.Date.ToString(format.LongDatePattern, format);
result = PersianCalendarHelper.ToCurrentCultureString(date.Value.Date, format.LongDatePattern, format);
}
return(result);
}
public static string ToAbbreviatedMonthString(DateTime?date, CultureInfo culture)
{
string result = string.Empty;
DateTimeFormatInfo format = GetDateFormat(culture);
if (date.HasValue && format != null)
{
//string[] monthNames = format.AbbreviatedMonthNames;
//if (monthNames != null && monthNames.Length > 0)
//{
// result = monthNames[(date.Value.Month - 1) % monthNames.Length];
//}
result = PersianCalendarHelper.ToCurrentCultureString(date.Value, "MMM", format);
}
return(result);
}
internal static DateTimeFormatInfo GetDateFormat(CultureInfo culture)
{
return(PersianCalendarHelper.GetDateTimeFormatInfo());
}
