Vc++ Give Wrong Output For Date When I Use It With Variant

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hi i ma wittting program for Win32_NTLogEvent..when i use time generated property in it. it runs but gives me wrong output..

My code is as below

C++

    hres = pclsObj->Get(L"TimeWritten", 0, &vtProp, 0, 0);
    wcout << "Event Log time written : " << vtProp.date << endl << endl ;

hres = pclsObj->Get(L"TimeGenerated", 0, &vtProp1, 0, 0);
    wcout << "Event Log time generated : " << vtProp1.date << endl << endl ;

and i got output as

Event Log time written -9.25596e+061

Event Log time generated -9.25596e+061

which is not in date/time format

Posted 3-Apr-14 19:49pm

Member 10678759

Updated 3-Apr-14 20:18pm

User 59241

v2

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User 59241 · Answer 1 · 2014-04-03T20:33:00

Solution 1

This returns a CIM datetime BSTR string (CIM_DATETIME).

http://msdn.microsoft.com/en-us/library/aa387237(v=vs.85).aspx[^]

http://technet.microsoft.com/en-us/library/ee156576.aspx[^]

It may be converted in this way:
http://blogs.msdn.com/b/oldnewthing/archive/2012/11/02/10365035.aspx[^]

http://myitforum.com/myitforumwp/2012/08/01/converting-tofrom-wmi-date-time/[^]

In C# you can use ManagementDateTimeConverter.ToDateTime.

[Edit] I have posted a tip on how to do this neatly How to decode the CIM_DATETIME format employed in WMI queries using C++[^]

Posted 3-Apr-14 20:33pm

User 59241

Updated 6-Apr-14 23:59pm

v4

Comments

Member 10678759 4-Apr-14 9:00am

hi i try to use how u suggest me

Date date;

vtProp.vt=VT_DATE;

vtProp.date=date;

VariantChangeType(&vtProp,&vtProp,VARIANT_NOVALUEPROP,VT_BSTR);

hres = pclsObj->Get(L"TimeWritten", 0, &vtProp, 0, 0);

wcout << "Event Log date generated : " << vtProp.bstrVal << endl;

now output is 20140403105831..i think its date but still not in format

[no name] 4-Apr-14 9:24am

So from the first link the format is yyyymmddHHMMSS.mmmmmmsUUU which is 2014-04-03 10:58:31 etc. You have to parse it yourself or use SWbemDateTime which is all in the links I posted in the answer. It is all there you just have to read the documentation provided.

Member 10678759 7-Apr-14 5:55am

i pasrse it wid mid function..thanx a lot its working..:-D

[no name] 7-Apr-14 6:00am

Thanks - I have posted a tip on how to do this - see link above

CPallini 7-Apr-14 6:02am

5.

[no name] 7-Apr-14 7:12am

Thanks