Stoitcho,
| It looks you have .NET 2.0 in mind. If this is the case I'd correct you in
| my turn.
..NET 2.0 *is* the current version. ;-)
| It looks like one of the changes that Microsoft's guys did, in .NET
| 2.0, is to change the value that DateTime wraps to UInt64
.
Interesting using ILDASM.EXE I see internally the DateTime now wraps an
UInt64 instead of an Int64, which if you think about it actually makes
sense.
However! That is an implementation detail. I consider both UInt64 & Int64 to
be 64-bit "integers", as oppose to a 64-bit floating point.
My initial statement was based on the Remarks - Version Considerations under
the link I gave initially, which tells you how the value is stored under 1.0
& 1.1 verses 2.0. Which is also why I gave the link, it tells you how its
stored in both versions.
http://msdn2.microsoft.com/03ybds8y(en-US,VS.80).aspx
--
Hope this helps
Jay [MVP - Outlook]
..NET Application Architect, Enthusiast, & Evangelist
T.S. Bradley -
http://www.tsbradley.net
| Jay,
|
| Thanks for the correction.
|
| > Actually DateTime wraps one Int64 number.
| >
http://msdn2.microsoft.com/03ybds8y(en-US,VS.80).aspx
| >
| > I suspect you are thinking of COM DateTime values.
|
| I should've check first. I was talking .NET 1.x. I don't know where I got
| that probably some memories from some other frameworks I've used. It could
| be COM or VCL that I used many years ago.
|
| It looks you have .NET 2.0 in mind. If this is the case I'd correct you in
| my turn. It looks like one of the changes that Microsoft's guys did, in
..NET
| 2.0, is to change the value that DateTime wraps to UInt64
.
|
| Any ways whether is double, Int64 or UInt64 my point was that prior .NET
2.0
| DateTime didn't actually care for the time zone.
| >
| > | but information inside has
| > | nothig to do with any time zones.
| > Yes & No, a DateTime can represent local time, UTC time or unspecified,
| > Starting with .NET 2.0 there the DateTime.Kind property tells you which
| > the
| > DateTime represents. Although .NET 1.0 & 1.1 could be either, it was not
| > obvious which a specific DateTime was (effectively
| > DateTimeKind.Unspecified).
|
| Yes, I wasn't aware of these new additions of the DateTime probably
because
| I've never have any problems with it, but giving the fact how many
| probgrammers got confused of all this time-zone stuff I believe it is a
good
| thing to do.
|
| So thanks again for the correction.
|
|
| --
|
| Stoitcho Goutsev (100) [C# MVP]
|
|
| >
| >
http://msdn2.microsoft.com/e3t6hfy5(en-US,VS.80).aspx
| >
| > With .NET 2.0 you can indicate that you want a UTC DateTime (or Local
| > DateTime, or Unspecified), something like:
| >
| > DateTime dt1 = new DateTime(1970, 1,1, 0, 0, 0,
| > DateTimeKind.Utc);
| > Debug.WriteLine(dt1.ToUniversalTime(), "dt1(utc)");
| >
| >
| > --
| > Hope this helps
| > Jay [MVP - Outlook]
| > .NET Application Architect, Enthusiast, & Evangelist
| > T.S. Bradley -
http://www.tsbradley.net
| >
| >
| > | > | Maziar,
| > |
| > | Common mistake is that programmers assume DataTime objects has some
| > relation
| > | to some time zone. There is no such thing. DateTime wraps one double
| > number
| > | and that is what it knows all about. Thre are couple of methods and
| > | properties that take into account the time zone, but information
inside
| > has
| > | nothig to do with any time zones.
| > |
| > | So the answer of your question is pretty simple:
| > | DateTime dt1 = new DateTime(1970, 1,1);
| > | Debug.WriteLine("dt1(utc):"+ dt1.ToString());
| > |
| > | Jan 1st, 1970 00:00 is the same in any time zone.
| > |
| > | If you want to het the current time in unix like format as
milliseconds
| > | since Jan 1st, 1970 you can do:
| > |
| > | (DateTime.UtcNow - new DateTime(1970,
| > 1,1)).TotalMilliseconds.ToString();
| > |
| > | UtcNow property is one of few that take into accound the current time
| > zone.
| > |
| > |
| > | --
| > | HTH
| > | Stoitcho Goutsev (100) [C# MVP]
| > |
| > | | > | > Hi,
| > | >
| > | > Can someone please tell me how I can set DateTime to 01/01/1970
(UTC).
| > | > Doing the following
| > | >
| > | > DateTime dt1 = new DateTime(1970, 1,1);
| > | > Debug.WriteLine("dt1(utc):"+ dt1.ToUniversalTime().ToString());
| > | >
| > | > Doing the following returns 1/1/1970 5:00:00 AM
| > | >
| > | > However, I want to set the DateTime so that it would return 1/1/1970
| > | > 12:00:00 AM instead.
| > | >
| > | > Basically force DateTime(1970,1,1) to be UTC.
| > | >
| > | > Thanks
| > | > Maz.
| > | >
| > |
| > |
| >
| >
|
|
