public static DateTime Parse(string s, IFormatProvider provider, DateTimeStyles style)
{
if (s == null)
{
throw new ArgumentNullException("s");
}
s = s.Trim();
// try all .NET date time formats
// Note: the Date/Time handling in java is just broken, and putting a
// .NET compatibility layer on top of it will probalby not fix much
var ci = provider.ToCultureInfo();
string[] formats =
{
ci.DateTimeFormat.UniversalSortableDateTimePattern,
ci.DateTimeFormat.SortableDateTimePattern,
ci.DateTimeFormat.FullDateTimePattern,
ci.DateTimeFormat.RFC1123Pattern,
ci.DateTimeFormat.LongDatePattern,
ci.DateTimeFormat.LongTimePattern,
ci.DateTimeFormat.ShortDatePattern,
ci.DateTimeFormat.ShortTimePattern
};
var utc = TimeZone.GetTimeZone("UTC");
// Note: I'm not sure this whole approach is the best anyway. Exception handling
// for control flow, a loop to tests all formats and such.
// It would probably better to use jodatime or nodatime. Maybe the parsing
// routine can be ripped off nodatime, so we don't have to include the whole
// library.
foreach (var pattern in formats)
{
try
{
var formatter = DateFormatFactory.GetFormat(pattern, DateTimeKind.Unspecified, provider);
formatter.Format.TimeZone = utc; // reset mutable value
Date parsed = formatter.Format.Parse(s);
var result = FromParsedDate(parsed, s, style, formatter.Format, formatter.ContainsK, formatter.UseUtc);
return(result);
}
catch (ParseException)
{
}
}
throw new ArgumentException("unable to parse " + s);
}
public static DateTime ParseExact(string s, string format, IFormatProvider provider, DateTimeStyles style)
{
// Note: the Date/Time handling in java is just broken, and putting a
// .NET compatibility layer on top of it will probalby not fix much
if (s == null || format == null)
{
throw new ArgumentNullException();
}
if ((style & DateTimeStyles.AllowLeadingWhite) != 0)
{
s = s.TrimStart();
}
if ((style & DateTimeStyles.AllowTrailingWhite) != 0)
{
s = s.TrimEnd();
}
if ((style & DateTimeStyles.AllowWhiteSpaces) != 0)
{
s = s.Trim();
}
try
{
var formatter = DateFormatFactory.GetFormat(format, DateTimeKind.Unspecified, provider);
formatter.Format.TimeZone = TimeZone.GetTimeZone("UTC"); // reset mutable value
Date parsed = formatter.Format.Parse(s);
var result = FromParsedDate(parsed, s, style, formatter.Format, formatter.ContainsK, formatter.UseUtc);
return(result);
}
catch (ArgumentException ex)
{
throw new FormatException(ex.Message);
}
catch (ParseException ex)
{
throw new ArgumentException(ex.Message, "s");
}
}