Bug 4817 - NSDate to DateTime conversion wrong?
Summary: NSDate to DateTime conversion wrong?
Alias: None
Product: iOS
Classification: Xamarin
Component: Xamarin.iOS.dll ()
Version: 5.2
Hardware: PC Mac OS
: --- normal
Target Milestone: Untriaged
Assignee: Bugzilla
Depends on:
Reported: 2012-05-02 06:25 UTC by Ruben Vermeersch
Modified: 2012-05-02 08:29 UTC (History)
2 users (show)

Is this bug a regression?: ---
Last known good build:

screenshot (40.34 KB, image/png)
2012-05-02 06:25 UTC, Ruben Vermeersch
screenshot with full times (48.18 KB, image/png)
2012-05-02 07:12 UTC, Ruben Vermeersch

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Description Ruben Vermeersch 2012-05-02 06:25:14 UTC
Created attachment 1790 [details]

Have a look at the attached screenshot. The code that does this is roughly:

When the picker changes:

  DateTime someProp = picker.Date;
  label.Text = String.Format ("{0:D}", someProp);

Am I using this wrong or is this badly broken?
Comment 1 Rolf Bjarne Kvinge [MSFT] 2012-05-02 06:58:23 UTC
It's likely a timezone difference. Can you show the date(s) with timezone too?
Comment 2 Ruben Vermeersch 2012-05-02 07:12:21 UTC
Created attachment 1791 [details]
screenshot with full times

You are right, there's a two hour shift, probably because one of the types interprets the date as UTC and the other as local. Is there a recommended practice for dealing with NSDate/DateTime?
Comment 3 Ruben Vermeersch 2012-05-02 07:12:54 UTC
Added screenshot
Comment 4 Rolf Bjarne Kvinge [MSFT] 2012-05-02 07:44:02 UTC
They're actually the same date, just displayed differently.

Try this:

  DateTime someProp = picker.Date.ToLocalTime ();
  label.Text = String.Format ("{0:D}", someProp);
Comment 5 Ruben Vermeersch 2012-05-02 08:29:20 UTC
That was the fix, so it was a bug in my code. Thanks!