Where am I?

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I have a Windows Service which can run in three locations - London, Hong Kong or Singapore. This is new, previously it was just London or Hong Kong, and to determine which I looked at the local timezone. This worked well.

Hong Kong and Singapore share the same timezone though so this method can't distinguish the two.

Any ideas for a simple strategy to tell where the service is running?

(btw - I'm ruling out using IP configuration)

Posted 13-Jan-15 23:28pm

Rob Philpott

Updated 13-Jan-15 23:29pm

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[no name] 14-Jan-15 5:36am

A pragmatic Approach: Plug in an GPS USB Stick ....

Rob Philpott 14-Jan-15 5:38am

Good idea. Server is likely to be in some underground bunker without clear site of satellites/won't satisfy management though, I suspect.

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E.F. Nijboer · Accepted Answer · 2015-01-13T23:38:00

Solution 1

Check RegioInfo of the CurrentRegion:
http://msdn.microsoft.com/en-us/library/system.globalization.regioninfo%28v=vs.110%29.aspx[^]

http://msdn.microsoft.com/en-us/library/system.globalization.regioninfo.currentregion%28v=vs.110%29.aspx[^]

Good luck!

Posted 13-Jan-15 23:38pm

E.F. Nijboer

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Rob Philpott 14-Jan-15 5:43am

Sweet. Will investigate this and get back to you. I think I can actually do it using timezones as it turns out. Hong Kong is 'China Standard Time' whereas Singapore is 'Malay Peninsula Standard Time', but this might be better...

Rob Philpott 14-Jan-15 5:54am

OK, this is undoubtedly the way to do it - in a normal place. RegionInfo.CurrentRegion.DisplayName would seem to be ideal, except that for London I get 'United Kingdom', Hong Kong 'United States', and Singapore 'United Kingdom'

I can well believe the servers aren't set up correctly. For this reason I think Timezone is probably more reliable, if that's wrong the time is likely to be wrong and picked up on, but being configured towards the UK/US is probably accidental or just normal.

Thanks for the answer.

E.F. Nijboer 14-Jan-15 8:22am

I personally would go with the TwoLetterISORegionName or ThreeLetterISORegionName. Also, even though a server might be configured towards UK/US, they might have certain settings configured more local. Maybe a check on currency could help out for example because they both have a different kind of dollar. Just another idea you might want to consider. It might also be helpfull to get send RegionInfo and CultureInfo from all the servers and compare and analyze them.

Rob Philpott 14-Jan-15 8:35am

Worth a try. Unfortunately the same story though GBR/USA/GBR. If that's the way the server has been configured then that's that really.

So if UTC offset < 8, then London else if Timezone contains the world 'Malay' Singapore else HK. Grubby, but seems to work.

E.F. Nijboer 14-Jan-15 12:11pm

Ah, you already used the TwoLetterISO. But if the current method works it works :-)