Fan.Sys.DateTimeStr.parseDateTime C# (CSharp) Méthode

        internal DateTime parseDateTime(string s, TimeZone defTz, bool check)
        {
            try
              {
            // parse into fields
            tzOffset = System.Int32.MaxValue;
            parse(s);

            // now figure out what timezone to use
            TimeZone.Rule defRule = defTz.rule(year);
            if (tzName != null)
            {
              // use defTz if tzName was specified and matches any variations of defTz
              if (tzName == defTz.name() ||
              tzName == defRule.stdAbbr ||
              tzName == defRule.dstAbbr)
              {
            tz = defTz;
              }

              // try to map tzName to TimeZone, use defTz as fallback
              else
              {
            tz = TimeZone.fromStr(tzName, false);
            if (tz == null) tz = defTz;
              }
            }

            // if tzOffset was specified...
            else if (tzOffset != System.Int32.MaxValue)
            {
              // figure out what expected offset was for defTz
              int time = hour*3600 + min*60 + sec;
              int defOffset = defRule.offset + TimeZone.dstOffset(defRule, year, (int)mon.ordinal(), day, time);

              // if specified offset matches expected offset for defTz then
              // use defTz, otherwise use a vanilla GMT+/- timezone
              if (tzOffset == defOffset)
            tz = defTz;
              else
            tz = TimeZone.fromGmtOffset(tzOffset);
            }

            // no tzName or tzOffset specified, use defTz
            else tz = defTz;

            // construct DateTime
            return new DateTime(year, (int)mon.ordinal(), day, hour, min, sec, ns, tzOffset, tz);
              }
              catch (Exception) {}
              if (check) throw ParseErr.make("DateTime", s).val;
              return null;
        }