public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
{
// logic is exactly as in DateTimeConverter, only the offset pattern ' zzz' is added to the default
// ConvertToString pattern.
if (destinationType == typeof(string) && value is DateTimeOffset)
{
DateTimeOffset dto = (DateTimeOffset)value;
if (dto == DateTimeOffset.MinValue)
{
return string.Empty;
}
if (culture == null)
{
culture = CultureInfo.CurrentCulture;
}
DateTimeFormatInfo formatInfo = null;
formatInfo = (DateTimeFormatInfo)culture.GetFormat(typeof(DateTimeFormatInfo));
string format;
if (culture == CultureInfo.InvariantCulture)
{
// note: the y/m/d format used when there is or isn't a time component is not consistent
// when the culture is invariant, because for some reason InvariantCulture's date format is
// MM/dd/yyyy. However, this matches the behavior of DateTimeConverter so it is preserved here.
if (dto.TimeOfDay.TotalSeconds == 0)
{
// pattern just like DateTimeConverter when DateTime.TimeOfDay.TotalSeconds==0
// but with ' zzz' offset pattern added.
return dto.ToString("yyyy-MM-dd zzz", culture);
}
else
{
return dto.ToString(culture);
}
}
if (dto.TimeOfDay.TotalSeconds == 0)
{
// pattern just like DateTimeConverter when DateTime.TimeOfDay.TotalSeconds==0
// but with ' zzz' offset pattern added.
format = formatInfo.ShortDatePattern + " zzz";
}
else
{
// pattern just like DateTimeConverter when DateTime.TimeOfDay.TotalSeconds!=0
// but with ' zzz' offset pattern added.
format = formatInfo.ShortDatePattern + " " + formatInfo.ShortTimePattern + " zzz";
}
return dto.ToString(format, CultureInfo.CurrentCulture);
}
return base.ConvertTo(context, culture, value, destinationType);
}
}
