ManagementDateTime.cs source code in C# .NET

                        
Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Wmi / managed / System / Management / ManagementDateTime.cs / 1305376 / ManagementDateTime.cs
                        

                        
                            using System; 
using System.Globalization;


namespace System.Management 
{
 	/// 
 
	///     Provides methods to convert DMTF datetime and time interval to CLR compliant 
	///     and  format and vice versa.
	///     
 	/// 
	/// 
 	///    
 	/// using System; 
	/// using System.Management;
 	/// 
	/// // The sample below demonstrates the various conversions that can be done using ManagementDateTimeConverter class 
	/// class Sample_ManagementDateTimeConverterClass
	/// { 
 	///     public static int Main(string[] args)
	///     {
 	///         string dmtfDate = "20020408141835.999999-420";
 	///         string dmtfTimeInterval = "00000010122532:123456:000"; 
	///
 	///         // Converting DMTF datetime to System.DateTime 
	///         DateTime dt = ManagementDateTimeConverter.ToDateTime(dmtfDate); 
	///
	///         // Converting System.DateTime to DMTF datetime 
 	///         string dmtfDate = ManagementDateTimeConverter.ToDateTime(DateTime.Now);
	///
 	///         // Converting DMTF timeinterval to System.TimeSpan
 	///         System.TimeSpan tsRet = ManagementDateTimeConverter. ToTimeSpan(dmtfTimeInterval); 
	///
 	///         //Converting System.TimeSpan to DMTF time interval format 
	///         System.TimeSpan ts = new System.TimeSpan(10,12,25,32,456); 
	///         string dmtfTimeInt  = ManagementDateTimeConverter.ToDmtfTimeInterval(ts);
	/// 
 	///         return 0;
	///
 	///     }
 	/// } 
	///    
 	///     
	/// Imports System 
	/// Imports System.Management
	/// 
 	/// 'The sample below demonstrates the various conversions that can be done using ManagementDateTimeConverter class
	/// Class Sample_ManagementClass
 	///     Overloads Public Shared Function Main(args() As String) As Integer
 	///         Dim dmtfDate As String = "20020408141835.999999-420" 
	///         Dim dmtfTimeInterval As String = "00000010122532:123456:000"
 	/// 
	///         'Converting DMTF datetime and intervals to System.DateTime 
	///         Dim dt As DateTime = ManagementDateTimeConverter.ToDateTime(dmtfDate)
	/// 
 	///         'Converting System.DateTime to DMTF datetime
	///         dmtfDate = ManagementDateTimeConverter.ToDateTime(DateTime.Now)
 	///
 	///         ' Converting DMTF timeinterval to System.TimeSpan 
	///         Dim tsRet As System.TimeSpan = ManagementDateTimeConverter.ToTimeSpan(dmtfTimeInterval)
 	/// 
	///         'Converting System.TimeSpan to DMTF time interval format 
	///         Dim ts As System.TimeSpan = New System.TimeSpan(10, 12, 25, 32, 456)
	///         String dmtfTimeInt = ManagementDateTimeConverter.ToDmtfTimeInterval(ts) 
 	///
	///         Return 0
 	///     End Function
 	/// End Class 
	///
 	///     
	///  
	public sealed class ManagementDateTimeConverter
	{ 
 		// constants
		private const int SIZEOFDMTFDATETIME = 25;
 		private const int MAXSIZE_UTC_DMTF = 999;
 		private const long MAXDATE_INTIMESPAN = 99999999; 

		private ManagementDateTimeConverter() 
 		{ 
		}
 

		/// 

		/// Converts a given DMTF datetime to  object. The returned DateTime will be in the
 		///			current TimeZone of the system. 
		/// 
 		/// A string representing the datetime in DMTF format. 
 		///  
		/// A  object that represents the given DMTF datetime.
 		///  
		/// 
		///			 Date and time in WMI is represented in DMTF datetime format. This format is explained in WMI SDK documentation.
		///				DMTF datetime string has an UTC offset which this datetime string represents.
 		///				 During conversion to , UTC offset is used to convert the date to the 
		///				current timezone. According to DMTF format a particular field can be represented by the character
 		///				'*'. This will be converted to the MinValue of this field that can be represented in . 
 		///			 
		/// 
 		///  
		///    
		///	// Convert a DMTF datetime to System.DateTime
		///	DateTime date = ManagementDateTimeConverter.ToDateTime("20020408141835.999999-420");
 		///     
		///    
 		///	' Convert a DMTF datetime to System.DateTime 
 		///	Dim date as DateTime = ManagementDateTimeConverter.ToDateTime("20020408141835.999999-420") 
		///    
 		///  
		public static DateTime ToDateTime(string dmtfDate)
		{
			int year = DateTime.MinValue.Year;
 			int month = DateTime.MinValue.Month; 
			int day = DateTime.MinValue.Day;
 			int hour = DateTime.MinValue.Hour; 
 			int minute = DateTime.MinValue.Minute; 
			int second = DateTime.MinValue.Second;
 			int millisec = 0; 
			string dmtf = dmtfDate;
			DateTime datetime = DateTime.MinValue;
			
 			// If the string passed is empty or null then throw 
			// an exception
 			if(dmtf == null) 
 			{ 
				throw new System.ArgumentOutOfRangeException("dmtfDate");
 			} 
			if (dmtf.Length == 0)
			{
				throw new System.ArgumentOutOfRangeException("dmtfDate");
 			} 
			
 			// if the length of the string is not equal to the 
 			// standard length of the DMTF datetime then throw an exception 
			if(dmtf.Length != SIZEOFDMTFDATETIME)
 			{ 
				throw new System.ArgumentOutOfRangeException("dmtfDate");
			}

			IFormatProvider frmInt32 = (IFormatProvider)CultureInfo.InvariantCulture.GetFormat(typeof(System.Int32)); 
 			System.Int64 ticks = 0;
			try 
 			{ 
 				
				string tempString = System.String.Empty; 
 				tempString = dmtf.Substring(0, 4);
				if (("****" != tempString))
				{
					year = System.Int32.Parse(tempString,frmInt32); 
 				}
				tempString = dmtf.Substring(4, 2); 
 				if (("**" != tempString)) 
 				{
					month = System.Int32.Parse(tempString,frmInt32); 
 				}
				tempString = dmtf.Substring(6, 2);
				if (("**" != tempString))
				{ 
 					day = System.Int32.Parse(tempString,frmInt32);
				} 
 				tempString = dmtf.Substring(8, 2); 
 				if (("**" != tempString))
				{ 
 					hour = System.Int32.Parse(tempString,frmInt32);
				}
				tempString = dmtf.Substring(10, 2);
				if (("**" != tempString)) 
 				{
					minute = System.Int32.Parse(tempString,frmInt32); 
 				} 
 				tempString = dmtf.Substring(12, 2);
				if (("**" != tempString)) 
 				{
					second = System.Int32.Parse(tempString,frmInt32);
				}
				tempString = dmtf.Substring(15, 6); 
 				if (("******" != tempString))
				{ 
 					ticks = (System.Int64.Parse(tempString,(IFormatProvider)CultureInfo.InvariantCulture.GetFormat(typeof(System.Int64)))) * (System.TimeSpan.TicksPerMillisecond/1000); 
 				}
				if( year < 0 || month < 0 || day < 0 || hour < 0 || minute < 0 || second < 0 || ticks < 0) 
 				{
					throw new System.ArgumentOutOfRangeException("dmtfDate");
				}
 
			}
 			catch 
			{ 
 				throw new System.ArgumentOutOfRangeException("dmtfDate");
 			} 


			// Construct a new System.DateTime object
 			datetime = new System.DateTime(year, month, day, hour, minute, second, millisec); 
			// Then add the ticks calculated from the microseconds
			datetime = datetime.AddTicks(ticks); 
			 
 			// Adjust the UTC time to reflect the current zone time
			System.TimeZone curZone = System.TimeZone.CurrentTimeZone; 
 			System.TimeSpan tickOffset = curZone.GetUtcOffset(datetime);
 			long OffsetMins = tickOffset.Ticks / System.TimeSpan.TicksPerMinute;
			
 			// Adjusting the DateTime for the current UTC 
			int UTCOffset =  0;
			string tempString1 = dmtf.Substring(22, 3); 
			long OffsetToBeAdjusted = 0; 
 			if (("***" != tempString1))
			{ 
 				tempString1 = dmtf.Substring(21, 4);
 				try
				{
 					UTCOffset = System.Int32.Parse(tempString1,frmInt32); 
				}
				catch 
				{ 
 					throw new System.ArgumentOutOfRangeException();
				} 

 				OffsetToBeAdjusted = UTCOffset-OffsetMins;
 				
				// We have to substract the minutes from the time 
 				datetime = datetime.AddMinutes(OffsetToBeAdjusted * -1);
 
			} 
			return datetime;
		} 

 		/// 

		/// Converts a given  object to DMTF format.
 		///		 
 		/// 
		/// A  object representing the datetime to be converted to DMTF datetime. 
 		///  
		/// A string that represents the DMTF datetime for the given DateTime object.
		///  
		/// 
 		///			 Date and time in WMI is represented in DMTF datetime format. This format is explained in WMI SDK documentation.
		///				The DMTF datetime string represented will be with respect to the UTC offset of the
 		///				current timezone. The lowest precision in DMTF is microseconds and 
 		///				in  is Ticks , which is equivalent to 100 of nanoseconds.
		///				 During conversion these Ticks are converted to microseconds and rounded 
 		///				 off to the the nearest microsecond. 
		///			
		///  
		/// 
 		///    
		///	// Convert the current time in System.DateTime to DMTF format
 		///	string dmtfDateTime = ManagementDateTimeConverter.ToDmtfDateTime(DateTime.Now); 
 		///    
		///     
 		///	' Convert the current time in System.DateTime to DMTF format 
		///	Dim dmtfDateTime as String = ManagementDateTimeConverter.ToDmtfDateTime(DateTime.Now)
		///     
		/// 
 		public static string ToDmtfDateTime(DateTime date)
		{
 			string UtcString = String.Empty; 
 			// Fill up the UTC field in the DMTF date with the current
			// zones UTC value 
 			System.TimeZone curZone = System.TimeZone.CurrentTimeZone; 
			System.TimeSpan tickOffset = curZone.GetUtcOffset(date);
			long OffsetMins = (tickOffset.Ticks / System.TimeSpan.TicksPerMinute); 
			IFormatProvider frmInt32 = (IFormatProvider)CultureInfo.InvariantCulture.GetFormat(typeof(System.Int32));

 			// If the offset is more than that what can be specified in DMTF format, then
			// convert the date to UniversalTime 
 			if(Math.Abs(OffsetMins) > MAXSIZE_UTC_DMTF)
 			{ 
				date = date.ToUniversalTime(); 
 				UtcString = "+000";
			} 
			else
			if ((tickOffset.Ticks >= 0))
 			{
				UtcString = "+" + ((tickOffset.Ticks / System.TimeSpan.TicksPerMinute)).ToString(frmInt32).PadLeft(3,'0'); 
 			}
 			else 
			{ 
 				string strTemp = OffsetMins.ToString(frmInt32);
				UtcString = "-" + strTemp.Substring(1, strTemp.Length-1).PadLeft(3,'0'); 
			}

			string dmtfDateTime = date.Year.ToString(frmInt32).PadLeft(4,'0');
 
 			dmtfDateTime = (dmtfDateTime + date.Month.ToString(frmInt32).PadLeft(2, '0'));
			dmtfDateTime = (dmtfDateTime + date.Day.ToString(frmInt32).PadLeft(2, '0')); 
 			dmtfDateTime = (dmtfDateTime + date.Hour.ToString(frmInt32).PadLeft(2, '0')); 
 			dmtfDateTime = (dmtfDateTime + date.Minute.ToString(frmInt32).PadLeft(2, '0'));
			dmtfDateTime = (dmtfDateTime + date.Second.ToString(frmInt32).PadLeft(2, '0')); 
 			dmtfDateTime = (dmtfDateTime + ".");
			
			// Construct a DateTime with with the precision to Second as same as the passed DateTime and so get
			// the ticks difference so that the microseconds can be calculated 
 			DateTime dtTemp = new DateTime(date.Year ,date.Month,date.Day ,date.Hour ,date.Minute ,date.Second,0);
			System.Int64 microsec = ((date.Ticks-dtTemp.Ticks) * 1000) / System.TimeSpan.TicksPerMillisecond; 
 			 
 			// fill the microseconds field
			String strMicrosec = microsec.ToString((IFormatProvider)CultureInfo.InvariantCulture.GetFormat(typeof(System.Int64))); 
 			if(strMicrosec.Length > 6)
			{
				strMicrosec = strMicrosec.Substring(0,6);				
			} 
 			dmtfDateTime = dmtfDateTime + strMicrosec.PadLeft(6,'0');
			// adding the UTC offset 
 			dmtfDateTime = dmtfDateTime + UtcString; 

 			return dmtfDateTime; 
		}
 		/// 

		/// Converts a given DMTF time interval to  object.
		/// 
 
		/// A string represesentation of the DMTF time interval.
 		///  
		/// A  object that represents the given DMTF time interval. 
 		/// 
 		///  
		///			 Time interval in WMI is represented in DMTF format. This format is explained in WMI SDK documentation.
 		///					If the DMTF time interval value is more than that of
		///					 then  is thrown.
		///			 
		/// 
 		///  
		///     
 		///	// Convert a DMTF time interval to System.TimeSpan
 		///	TimeSpan dmtfTimeInterval = ManagementDateTimeConverter.ToTimeSpan("00000010122532:123456:000"); 
		///    
 		///    
		///	' Convert a DMTF time interval to System.TimeSpan
		///	Dim ts as TimeSpan = ManagementDateTimeConverter.ToTimeSpan("00000010122532:123456:000") 
		///    
 		///  
		public static TimeSpan ToTimeSpan(string dmtfTimespan) 
 		{
 			int days = 0; 
			int hours = 0;
 			int minutes = 0;
			int seconds = 0;
			IFormatProvider frmInt32 = (IFormatProvider)CultureInfo.InvariantCulture.GetFormat(typeof(System.Int32)); 

			string dmtfts = dmtfTimespan; 
 			TimeSpan timespan = TimeSpan.MinValue; 

			if (dmtfts == null) 
 			{
 				throw new System.ArgumentOutOfRangeException("dmtfTimespan");
			}
 			if (dmtfts.Length == 0) 
			{
				throw new System.ArgumentOutOfRangeException("dmtfTimespan"); 
			} 
 			if(dmtfts.Length != SIZEOFDMTFDATETIME)
			{ 
 				throw new System.ArgumentOutOfRangeException("dmtfTimespan");
 			}
			if(dmtfts.Substring(21,4) != ":000")
 			{ 
				throw new System.ArgumentOutOfRangeException("dmtfTimespan");
			} 
 
			System.Int64 ticks = 0;
 			try 
			{
 				string tempString = System.String.Empty;

 				tempString = dmtfts.Substring(0, 8); 
				days = System.Int32.Parse(tempString,frmInt32);
 
 				tempString = dmtfts.Substring(8, 2); 
				hours = System.Int32.Parse(tempString,frmInt32);
 
				tempString = dmtfts.Substring(10, 2);
				minutes = System.Int32.Parse(tempString,frmInt32);

 				tempString = dmtfts.Substring(12, 2); 
				seconds = System.Int32.Parse(tempString,frmInt32);
 
 				tempString = dmtfts.Substring(15, 6); 
 				ticks = (System.Int64.Parse(tempString,(IFormatProvider)CultureInfo.InvariantCulture.GetFormat(typeof(System.Int64)))) * (System.TimeSpan.TicksPerMillisecond/1000);
 
			}
 			catch
			{
				throw new System.ArgumentOutOfRangeException("dmtfTimespan"); 
			}
 
 			if( days < 0 || hours < 0 || minutes < 0 || seconds < 0 || ticks < 0 ) 
			{
 				throw new System.ArgumentOutOfRangeException("dmtfTimespan"); 
 			}

			timespan = new System.TimeSpan(days, hours, minutes, seconds, 0);
 			// Get a timepan for the additional ticks obtained for the microsecond part of DMTF time interval 
			// and then add it to the the original timespan
			TimeSpan tsTemp = System.TimeSpan.FromTicks(ticks); 
			timespan = timespan + tsTemp; 
 			
			return timespan; 
 		}

 		/// 

		/// Converts a given  object to DMTF time interval. 
 		/// 
		///  A  object representing the datetime to be converted to DMTF time interval. 
		///  
		/// 
 		/// A string that represents the DMTF time interval for the given TimeSpan object. 
		/// 
 		/// 
 		///			 Time interval in WMI is represented in DMTF datetime format. This format
		///				is explained in WMI SDK documentation. The lowest precision in 
 		///				DMTF is microseconds and in  is Ticks , which is equivalent
		///				to 100 of nanoseconds.During conversion these Ticks are converted to 
		///				microseconds and rounded off to the the nearest microsecond. 
		///			
 		///  
		/// 
 		///    
 		///	// Construct a Timespan object and convert it to DMTF format
		///	System.TimeSpan ts = new System.TimeSpan(10,12,25,32,456); 
 		///	String dmtfTimeInterval = ManagementDateTimeConverter.ToDmtfTimeInterval(ts);
		///     
		///     
		///	// Construct a Timespan object and convert it to DMTF format
 		///	Dim ts as System.TimeSpan = new System.TimeSpan(10,12,25,32,456) 
		///	Dim dmtfTimeInterval as String = ManagementDateTimeConverter.ToDmtfTimeInterval(ts)
 		///    
 		/// 
		public static string ToDmtfTimeInterval(TimeSpan timespan) 
 		{
			 
			string dmtftimespan = timespan.Days.ToString((IFormatProvider)CultureInfo.InvariantCulture.GetFormat(typeof(System.Int32))).PadLeft(8,'0'); 
			IFormatProvider frmInt32 = (IFormatProvider)CultureInfo.InvariantCulture.GetFormat(typeof(System.Int32));
 			 
			// Days that can be represented is more than what can be represented
 			// then throw an exception
 			// and also negative timespan cannot be represented in DMTF
			if(timespan.Days > MAXDATE_INTIMESPAN || timespan < TimeSpan.Zero) 
 			{
				throw new System.ArgumentOutOfRangeException(); 
			} 

			dmtftimespan = (dmtftimespan + timespan.Hours.ToString(frmInt32).PadLeft(2, '0')); 
 			dmtftimespan = (dmtftimespan + timespan.Minutes.ToString(frmInt32).PadLeft(2, '0'));
			dmtftimespan = (dmtftimespan + timespan.Seconds.ToString(frmInt32).PadLeft(2, '0'));
 			dmtftimespan = (dmtftimespan + ".");
 			 
			// Construct a DateTime with with the precision to Second as same as the passed DateTime and so get
 			// the ticks difference so that the microseconds can be calculated 
			TimeSpan tsTemp = new TimeSpan(timespan.Days ,timespan.Hours,timespan.Minutes ,timespan.Seconds ,0); 
			System.Int64 microsec = ((timespan.Ticks-tsTemp.Ticks) * 1000) / System.TimeSpan.TicksPerMillisecond;
			 
 			// fill the microseconds field
			String strMicrosec = microsec.ToString((IFormatProvider)CultureInfo.InvariantCulture.GetFormat(typeof(System.Int64)));		
 			if(strMicrosec.Length > 6)
 			{ 
				strMicrosec = strMicrosec.Substring(0,6);				
 			} 
			dmtftimespan = dmtftimespan + strMicrosec.PadLeft(6,'0'); 
			
			dmtftimespan = dmtftimespan + ":000"; 

 			return dmtftimespan;
		}
 	} // ManagementDateTimeConverter 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.


                        

                        

                        
                        

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