/// <summary>
/// Converts the String to a DateTime equivalent using the specified time zone
/// </summary>
/// <param name="s"></param>
/// <param name="timeZone"></param>
/// <param name="dateTimeKind"></param>
/// <returns></returns>
public static DateTime ToDateTime(string s, TzTimeZone timeZone, DateTimeKind dateTimeKind)
{
if (string.IsNullOrEmpty(s)) throw new ArgumentException(nameof(s));
if (timeZone == null) throw new ArgumentNullException(nameof(timeZone));
if (dateTimeKind == DateTimeKind.Unspecified) throw new ArgumentException(nameof(dateTimeKind));
System.Text.RegularExpressions.Match m = dateRegex.Match(s);
if (m.Success)
{
DateTime result = new DateTime(Convert.ToInt32(m.Groups["YEAR"].Value), Convert.ToInt32(m.Groups["MONTH"].Value),
Convert.ToInt32(m.Groups["DAY"].Value), Convert.ToInt32(m.Groups["HOUR"].Value), Convert.ToInt32(m.Groups["MINUTE"].Value),
Convert.ToInt32(m.Groups["SEC"].Value), DateTimeKind.Local);
if (m.Groups["MS"].Success)
{
result = result.AddMilliseconds(Convert.ToInt32(m.Groups["MS"]));
}
// Date is local, check return
if (m.Groups["UTC"].Success)
{
if (dateTimeKind == DateTimeKind.Utc)
return DateTime.SpecifyKind(result, DateTimeKind.Utc);
else
return timeZone.ToLocalTime(DateTime.SpecifyKind(result, DateTimeKind.Utc));
}
else {
// Date string is local, check offset
if (m.Groups["SGN"].Success)
{
// Translate in utc
if (m.Groups["SGN"].Value == "+")
result = result.AddHours(-Convert.ToInt32(m.Groups["SH"].Value)).AddMinutes(-Convert.ToInt32(m.Groups["SM"].Value));
else
result = result.AddHours(Convert.ToInt32(m.Groups["SH"].Value)).AddMinutes(Convert.ToInt32(m.Groups["SM"].Value));
if (dateTimeKind == DateTimeKind.Utc)
return DateTime.SpecifyKind(result, DateTimeKind.Utc);
else
return timeZone.ToLocalTime(DateTime.SpecifyKind(result, DateTimeKind.Utc));
}
else
{
// Zone unspecified, suppose to be local
if (dateTimeKind == DateTimeKind.Utc)
return timeZone.ToUniversalTime(result);
else
return result;
}
}
}
throw new ArgumentException(string.Format("{0} is not a valid format", s));
}
/// <summary>
/// Returns the local time in the specified time zone that correspond to the specified date in the current time zone.
/// </summary>
/// <param name="datetime">A date and time in the current time zone</param>
/// <param name="zone">The time zone in which the local time is converted.</param>
/// <returns>A local <see cref="DateTime"/> in the specified time zone.</returns>
public DateTime ToTimeZone(DateTime datetime, TzTimeZone zone)
{
if (zone == null)
{
throw new ArgumentNullException(nameof(zone));
}
if (datetime.Kind == DateTimeKind.Unspecified)
{
throw new ArgumentException("Unspecified date time kind", nameof(datetime));
}
if (datetime.Kind == DateTimeKind.Utc)
{
return(datetime);
}
DateTime utc = this.ToUniversalTime(datetime);
return(zone.ToLocalTime(utc));
}
/// <summary>
/// Returns the local time in the specified time zone that correspond to the specified date in the current time zone.
/// </summary>
/// <param name="datetime">A date and time in the current time zone</param>
/// <param name="zone">The time zone in which the local time is converted.</param>
/// <returns>A local <see cref="DateTime"/> in the specified time zone.</returns>
public DateTime ToTimeZone(DateTime datetime, TzTimeZone zone)
{
if (datetime.Kind == DateTimeKind.Unspecified) throw new ArgumentException("Unspecified date time kind", "datetime");
if (datetime.Kind == DateTimeKind.Utc) return datetime;
DateTime utc = this.ToUniversalTime(datetime);
return zone.ToLocalTime(utc);
}
/// <summary>
/// Converts the String to a DateTime equivalent using the specified time zone
/// </summary>
/// <param name="s"></param>
/// <param name="timeZone"></param>
/// <param name="dateTimeKind"></param>
/// <returns></returns>
public static DateTime ToDateTime(string s, TzTimeZone timeZone, DateTimeKind dateTimeKind)
{
if (string.IsNullOrEmpty(s))
{
throw new ArgumentNullException(nameof(s));
}
if (timeZone == null)
{
throw new ArgumentNullException(nameof(timeZone));
}
if (dateTimeKind == DateTimeKind.Unspecified)
{
throw new ArgumentException("Datetime kind unspecified", nameof(dateTimeKind));
}
System.Text.RegularExpressions.Match m = dateRegex.Match(s);
if (m.Success)
{
DateTime result = new DateTime(Convert.ToInt32(m.Groups["YEAR"].Value, CultureInfo.InvariantCulture),
Convert.ToInt32(m.Groups["MONTH"].Value, CultureInfo.InvariantCulture),
Convert.ToInt32(m.Groups["DAY"].Value, CultureInfo.InvariantCulture),
Convert.ToInt32(m.Groups["HOUR"].Value, CultureInfo.InvariantCulture),
Convert.ToInt32(m.Groups["MINUTE"].Value, CultureInfo.InvariantCulture),
Convert.ToInt32(m.Groups["SEC"].Value, CultureInfo.InvariantCulture), DateTimeKind.Local);
if (m.Groups["MS"].Success)
{
result = result.AddMilliseconds(Convert.ToInt32(m.Groups["MS"], CultureInfo.InvariantCulture));
}
// Date is local, check return
if (m.Groups["UTC"].Success)
{
if (dateTimeKind == DateTimeKind.Utc)
{
return(DateTime.SpecifyKind(result, DateTimeKind.Utc));
}
else
{
return(timeZone.ToLocalTime(DateTime.SpecifyKind(result, DateTimeKind.Utc)));
}
}
else
{
// Date string is local, check offset
if (m.Groups["SGN"].Success)
{
// Translate in utc
if (m.Groups["SGN"].Value == "+")
{
result = result.AddHours(-Convert.ToInt32(m.Groups["SH"].Value, CultureInfo.InvariantCulture))
.AddMinutes(-Convert.ToInt32(m.Groups["SM"].Value, CultureInfo.InvariantCulture));
}
else
{
result = result.AddHours(Convert.ToInt32(m.Groups["SH"].Value, CultureInfo.InvariantCulture))
.AddMinutes(Convert.ToInt32(m.Groups["SM"].Value, CultureInfo.InvariantCulture));
}
if (dateTimeKind == DateTimeKind.Utc)
{
return(DateTime.SpecifyKind(result, DateTimeKind.Utc));
}
else
{
return(timeZone.ToLocalTime(DateTime.SpecifyKind(result, DateTimeKind.Utc)));
}
}
else
{
// Zone unspecified, suppose to be local
if (dateTimeKind == DateTimeKind.Utc)
{
return(timeZone.ToUniversalTime(result));
}
else
{
return(result);
}
}
}
}
throw new ArgumentException($"{s} is an invalid format");
}