public static int FormatPart(this DateTimeFormatInfo result, string part, int current, bool isDateOnly, bool throwException = true)
{
if (part.Contains('d'))
{
result.SetDayFormat(part, current++, throwException);
return(current);
}
if (part.Contains('M'))
{
result.SetMonthFormat(part, current++, throwException);
return(current);
}
if (part.Contains('y'))
{
result.SetYearFormat(part, current++, throwException);
return(current);
}
if (isDateOnly && part.IsDateTimeFormatPart())
{
result.SetFormatError("Format string is incorrect. Time fields are not expected", throwException);
}
if (part.Contains('h') || part.Contains('H'))
{
result.SetHourFormat(part, current++, throwException);
return(current);
}
if (part.Contains('m'))
{
result.SetMinuteFormat(part, current++, throwException);
return(current);
}
if (part.Contains('s'))
{
result.SetSecondFormat(part, current++, throwException);
return(current);
}
if (part.Contains('t'))
{
result.SetAmPmFormat(part, current++, throwException);
return(current);
}
result.SetSeparator(part, current);
return(current);
}
public static void SetSecondFormat(this DateTimeFormatInfo formatInfo, string part, int position, bool throwException = true)
{
Argument.IsNotNull(() => formatInfo);
Argument.IsNotNull(() => part);
if (formatInfo.SecondFormat is not null)
{
formatInfo.SetFormatError("Format string is incorrect. Second field can not be specified more than once", throwException);
}
if (part.Length > 2)
{
formatInfo.SetFormatError("Format string is incorrect. Second field must be in one of formats: 's' or 'ss'", throwException);
}
formatInfo.SecondFormat = part;
formatInfo.SecondPosition = position;
}
public static void SetAmPmFormat(this DateTimeFormatInfo formatInfo, string part, int position, bool throwException = true)
{
Argument.IsNotNull(() => formatInfo);
Argument.IsNotNull(() => part);
if (formatInfo.AmPmFormat is not null)
{
formatInfo.SetFormatError("Format string is incorrect. AM/PM designator field can not be specified more than once", throwException);
}
if (part.Length > 2)
{
formatInfo.SetFormatError("Format string is incorrect. AM/PM designator field must be in one of formats: 't' or 'tt'", throwException);
}
formatInfo.AmPmFormat = part;
formatInfo.AmPmPosition = position;
formatInfo.IsAmPmShortFormat = part.Length < 2;
}
public static void SetYearFormat(this DateTimeFormatInfo formatInfo, string part, int position, bool throwException = true)
{
Argument.IsNotNull(() => formatInfo);
Argument.IsNotNull(() => part);
if (formatInfo.YearFormat is not null)
{
formatInfo.SetFormatError("Format string is incorrect. Year field can not be specified more than once", throwException);
}
if (part.Length > 5)
{
formatInfo.SetFormatError("Format string is incorrect. Year field must be in one of formats: 'y' or 'yy' or 'yyy' or 'yyyy' or 'yyyyy'", throwException);
}
formatInfo.YearFormat = part;
formatInfo.YearPosition = position;
formatInfo.IsYearShortFormat = part.Length < 3;
}
public static void SetHourFormat(this DateTimeFormatInfo formatInfo, string part, int position, bool throwException = true)
{
Argument.IsNotNull(() => formatInfo);
Argument.IsNotNull(() => part);
if (formatInfo.HourFormat is not null)
{
var errorMessage = part == formatInfo.HourFormat
? "Format string is incorrect. Hour field can not be specified more than once"
: "Format string is incorrect. Hour field must be 12 hour or 24 hour format, but no both";
formatInfo.SetFormatError(errorMessage, throwException);
}
if (part.Length > 2)
{
formatInfo.SetFormatError("Format string is incorrect. Hour field must be in one of formats: 'h' or 'H' or 'hh' or 'HH'", throwException);
}
formatInfo.HourFormat = part;
formatInfo.HourPosition = position;
formatInfo.IsHour12Format = part.Contains('h');
}