select * from Win32_OperatingSystem throwing exception

Question

I hace a WPF application and I'm am using the following to obtain the OS details of my PC:

using (ManagementObjectSearcher win32OperatingSystem = new ManagementObjectSearcher("select * from Win32_OperatingSystem"))
{
     foreach (ManagementObject obj in win32OperatingSystem.Get())
     {
         _operatingSystem = obj["Caption"].ToString();
         _osArchitecture = obj["OSArchitecture"].ToString();
         break;
     }
}

WhenI step into this line:

ManagementObject obj in win32OperatingSystem.Get())

I get the following exception:

Invalid Query.

WHat is wrong here??

I get an `invalid class` exception on some machines but not on all — Shekhar Reddy, Apr 13 '18 at 15:42

score 1 · Answer 1 · answered Jan 12 '14 at 18:00

1

WMI classes have a namespace, you didn't specify one. Use WMI Code Creator to get your queries correct, it generates the C# code for you and you can run it right from the tool to check the results.

answered Jan 12 '14 at 18:00

Hans Passant

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score 0 · Answer 2 · answered Jan 12 '14 at 17:56

0

I would suggest using the properties of the Environment and OperatingSystem class (instead of ManagementObjectSearcher) to get those details.

string _operatingSystem = Environment.OSVersion.VersionString;

answered Jan 12 '14 at 17:56

Douglas

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THis gives me "Microsoft Windows NT 6.1.7601 Service Pack 1" but I'm running Windows 7 which is what I want to display to the user. – Harry Boy Jan 12 '14 at 18:58
At least for 8.1(+) Environment.OSVersion.VersionString doesn't necessary display the running OS. (Rather its influenced by the C# application's manifest) – Tom Nov 20 '15 at 19:36
could you justify your suggestion? – Shekhar Reddy Apr 13 '18 at 15:36

select * from Win32_OperatingSystem throwing exception

2 Answers2