using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
namespace NetworkAssetManager.WMI
{
class WMIUtil
{
public static DateTime ToDateTime(string dmtfDate)
{
DateTime initializer = DateTime.MinValue;
int year = initializer.Year;
int month = initializer.Month;
int day = initializer.Day;
int hour = initializer.Hour;
int minute = initializer.Minute;
int second = initializer.Second;
long ticks = 0;
string dmtf = dmtfDate;
DateTime datetime = DateTime.MinValue;
string tempString = string.Empty;
if ((dmtf == null))
{
return DateTime.MinValue;
}
if ((dmtf.Length == 0))
{
return DateTime.MinValue;
}
if ((dmtf.Length != 25))
{
//return DateTime.MinValue;
}
try
{
tempString = dmtf.Substring(0, 4);
if (("****" != tempString))
{
year = int.Parse(tempString);
}
tempString = dmtf.Substring(4, 2);
if (("**" != tempString))
{
month = int.Parse(tempString);
}
tempString = dmtf.Substring(6, 2);
if (("**" != tempString))
{
day = int.Parse(tempString);
}
tempString = dmtf.Substring(8, 2);
if (("**" != tempString))
{
hour = int.Parse(tempString);
}
tempString = dmtf.Substring(10, 2);
if (("**" != tempString))
{
minute = int.Parse(tempString);
}
tempString = dmtf.Substring(12, 2);
if (("**" != tempString))
{
second = int.Parse(tempString);
}
tempString = dmtf.Substring(15, 6);
if (("******" != tempString))
{
ticks = (long.Parse(tempString) * ((long)((TimeSpan.TicksPerMillisecond / 1000))));
}
if (((((((((year < 0)
|| (month < 0))
|| (day < 0))
|| (hour < 0))
|| (minute < 0))
|| (minute < 0))
|| (second < 0))
|| (ticks < 0)))
{
return DateTime.MinValue;
}
}
catch (Exception)
{
return DateTime.MinValue;
}
datetime = new DateTime(year, month, day, hour, minute, second, 0);
datetime = datetime.AddTicks(ticks);
TimeSpan tickOffset = TimeZone.CurrentTimeZone.GetUtcOffset(datetime);
int UTCOffset = 0;
int OffsetToBeAdjusted = 0;
long OffsetMins = ((long)((tickOffset.Ticks / TimeSpan.TicksPerMinute)));
tempString = dmtf.Substring(22, 3);
if ((tempString != "******"))
{
tempString = dmtf.Substring(21, 4);
try
{
UTCOffset = int.Parse(tempString);
}
catch (Exception)
{
//HACK: (2009/08/06) Sometimes the UTC info in not proper so set UTC to 0 in such cases
UTCOffset = 0;
//return DateTime.MinValue;
}
OffsetToBeAdjusted = ((int)((OffsetMins - UTCOffset)));
datetime = datetime.AddMinutes(((double)(OffsetToBeAdjusted)));
}
return datetime;
}
}
}