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Topic: Problems with Daylight Saving Time change

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hmuscroft
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Joined: 29 December 2009
Location: United Kingdom
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Posts: 72

Posted: 30 March 2017 at 4:57am \| IP Logged

Hi - our app has been working really well with IMAP - thanks for your help in getting it implemented.

We've just come across a problem related to British Summertime (Daylight Saving Time) however, namely that emails in our app are appearing to be +1 hour out.

We record THREE date-related fields for emails :-
- composeddt
- receiveddt
- sentdt

Here's the code which saves these date fields from a MailBee Envelope (env) object :-

Code:

try { emaili.composeddt = new DateTime(env.Date.Ticks, DateTimeKind.Utc).ToLocalTime(); }

catch (MailBee.MailBeeException)

{

  try { emaili.composeddt = new DateTime(env.DateReceived.Ticks, DateTimeKind.Utc).ToLocalTime(); }

  catch (MailBee.MailBeeException) { emaili.composeddt = DateTime.Now; }

}

try { emaili.receiveddt = new DateTime(env.DateReceived.Ticks, DateTimeKind.Utc).ToLocalTime(); }

catch (MailBee.MailBeeException) { emaili.receiveddt = DateTime.Now; }

try { emaili.sentdt = new DateTime(env.Date.Ticks, DateTimeKind.Utc).ToLocalTime(); }

catch (MailBee.MailBeeException) { emaili.sentdt = null; }

It all worked perfectly before DST kicked in for British Summertime.

Please can you tell me what I'm doing wrong and how to fix it?

Many thanks!

Hedley

Alex
AfterLogic Support

Joined: 19 November 2003
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Posts: 2206

Posted: 30 March 2017 at 5:06am \| IP Logged

Are you on the latest version of MailBee.NET Objects (v11)?

Regards,
Alex

hmuscroft
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Posted: 30 March 2017 at 5:47am \| IP Logged

No I'm on 10.0.2.551

hmuscroft
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Posted: 30 March 2017 at 5:48am \| IP Logged

Sorry - I meant 10.0.45.551 (that's the DLL version number of MailBee.NET.45.Min)

Alex
AfterLogic Support

Joined: 19 November 2003
Online Status: Offline
Posts: 2206

Posted: 30 March 2017 at 6:00am \| IP Logged

Please confirm this issue remains with the latest version. Thanks!

Regards,
Alex

hmuscroft
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Location: United Kingdom
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Posts: 72

Posted: 30 March 2017 at 6:40am \| IP Logged

Hi - my maintenance contract had lapsed so I have renewed it, but I only have a key for version 10. Please can you send me a version 11 key?

Thanks.

Igor
AfterLogic Support

Joined: 24 June 2008
Location: United States
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Posts: 6103

Posted: 30 March 2017 at 6:42am \| IP Logged

Have just sent one via HelpDesk.

--
Thanks,
Igor, AfterLogic Support

hmuscroft
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Location: United Kingdom
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Posts: 72

Posted: 30 March 2017 at 7:31am \| IP Logged

Thanks - OK - all upgraded to v11 and the problem still persists.

The problem is obviously related to the way that I am getting the dates out of the ENVELOPE :-

Code:

new DateTime(env.DateReceived.Ticks, DateTimeKind.Utc).ToLocalTime();

I'm honestly not sure where I got that code from - my guess would be that I copied it from one of the demonstration projects.

What is the correct way to process the envelope DateTime objects in order to get the correct local time (taking DST into consideration)?

Thanks.

Alex
AfterLogic Support

Joined: 19 November 2003
Online Status: Offline
Posts: 2206

Posted: 30 March 2017 at 7:35am \| IP Logged

Please prepare a simple code like

MailMessage msg = new MailMessage();
msg.LoadMessage("msg.eml");
Console.WriteLine(msg.Date);

make sure the issue is still here and send us:
- msg.eml in question to let us reproduce the issue (via Helpdesk).
- Your output
- Expected output

Thanks!

Regards,
Alex

hmuscroft
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Joined: 29 December 2009
Location: United Kingdom
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Posts: 72

Posted: 30 March 2017 at 7:56am \| IP Logged

Here are some test results of an email sent at 15:51, hence that's the time I expect to see...

----------------------------------------
TEST : env.Date;
RESULT: 30/03/2017 15:51:37

TEST : new DateTime(env.Date.Ticks, DateTimeKind.Utc);
RESULT: 30/03/2017 15:51:37

TEST : new DateTime(env.Date.Ticks, DateTimeKind.Utc).ToLocalTime();
RESULT: 30/03/2017 16:51:37

TEST : new DateTime(env.Date.Ticks, DateTimeKind.Local);
RESULT: 30/03/2017 15:51:37

TEST : new DateTime(env.Date.Ticks, DateTimeKind.Local).ToLocalTime();
RESULT: 30/03/2017 15:51:37
----------------------------------------

Presumably the DateTime objects on a MAILBEE Envelope (or MailMessage) are stored in UTC, so which of the above is the recommended way to adjust the time to the user's locale?

Many thanks.

hmuscroft
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Posted: 30 March 2017 at 8:27am \| IP Logged

OK - sorted it myself. Dates are not stored as UTC unless :-

Code:

env.DatesAsUtc = true;

So that's what I needed.

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