Registry read Time Zone Info differ when code build on 4.0 framework on host system win 7 64 bit

Question

Hi 

I have created console app to test the my code , code behave different value when  it build from 2.0 framework to 4.0 framework. 

I wanna to read System Local time zone  in English in multilingual system . so have read the registry value .Below are codes ---

 

string tzName ="";

tzName = Registry.LocalMachine.OpenSubKey("System\\CurrentControlSet\\Control\\TimeZoneInformation").GetValue("TimeZoneKeyName", "", RegistryValueOptions.None).ToString();
                if (tzName == "")
                    tzName = Registry.LocalMachine.OpenSubKey("System\\CurrentControlSet\\Control\\TimeZoneInformation").GetValue("StandardName", "", RegistryValueOptions.None).ToString();

This code works well when it build on 2.0 framework  but in 4.0 framework it gives redundant value for e.g "GMT Standard Timetime" ,instead of "GMT Standard Time" , "Eastern Standard Timeard " instead of "Eastern Standard Time" , many other non character appended on time zone eg '/0' .

This only occur on win 7 64 bit , in win 8 its work fine 

Please help me out as earliest as possible 

Thanks

Paritosh Mishra 

Answer 1

Hi, I think you can try to use TimeZone.CurrentTimeZone.StandardName to get standard name

If you want to get more Time Zone Info, you can try TimeZoneInfo class.

Answer 2

Hi , 

Thanks for a  quick response . My application support multilingual , therefore TimeZoneInfo  class return  string depends on system language .I need only English  Local Time Zone as registry has. 

below are codes I used but not worked when system has language other than english

TimeZoneInfo localZone = TimeZoneInfo.Local;
 tzName = localZone.Id.Trim()

The strange things that "Registry.LocalMachine.OpenSubKey("System\\CurrentControlSet\\Control\\TimeZoneInformation").GetValue("TimeZoneKeyName", "", RegistryValueOptions.None).ToString();" this code worked in win 8 but not in win 7 

and its also worked when build on 2.0  on win 7 but not in  4.0 ,win7 

Please help me on  urgent basis 

Thanks for advance 

Regards

Paritosh Mishra 

Answer 3

Hi Paritosh,

Try the method on the following link. http://blogs.msdn.com/b/bclteam/archive/2007/06/07/exploring-windows-time-zones-with-system-timezoneinfo-josh-free.aspx.

Regards,

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Answer 4

I ran into the same problem, and found your question here via Google. Since none of the answers here addresses a basic point in your question (.Net 2 vs. .Net 4), I posted a question on Stack Overflow, and eventually got an answer there. It looks like what we have encountered is due to sloppy programming on the part of Microsoft combined with a change in how .Net 4 returns string data from the registry.

http://stackoverflow.com/questions/27716746/hklm-system-currentcontrolset-control-timezoneinformation-timezonekeyname-corrup