CODEWITHSUNDEEP
c#.netwmi
codelady
codelady

Reputation: 83

ManagementObjectSearcher Get() method returns no results

I'm trying to terminate a process on a remote machine with WMI / C# on .NET 4.5. In the code below, when the Get method is called on the ManagementObjectSearcher instance nothing is returned, so the line inside the foreach is not reached. The ManagementScope is connected and the query variable contains the name of the process for termination. Thx for any help.

try
        {
            ConnectionOptions connOptions = new ConnectionOptions();
            connOptions.Impersonation = ImpersonationLevel.Impersonate;
            connOptions.EnablePrivileges = true;
            ManagementScope manScope = new ManagementScope(String.Format(@"\\{0}\ROOT\CIMV2", NetworkName), connOptions);
            manScope.Connect();
            var query = new SelectQuery("select * from Win32_process where name = '" + ProcessName + "'");

            using (var searcher = new ManagementObjectSearcher(manScope, query))
            {
                foreach (ManagementObject process in searcher.Get())
                {
                    process.InvokeMethod("Terminate", null);
                }
            }
        }
        catch (ManagementException err)
        {
            //Do something with error message here
        }

Upvotes: 1

Views: 4844

Answers (3)

IDizor
IDizor

Reputation: 153

In my case i was unable to receive CPU utilization value remotely using WMI query:

SELECT PercentProcessorTime FROM Win32_PerfFormattedData_PerfOS_Processor WHERE Name='_Total'

I changed project build platform target from Any CPU to x64 to match my system bitness, and problem was solved. Another way is uncheck Prefer 32-bit checkbox when Any CPU is selected.

Upvotes: 1

codelady
codelady

Reputation: 83

As outlined in my comment above, for completeness here's the code with my changes that are as follows.

        try
        {
            ConnectionOptions connOptions = new ConnectionOptions();
            connOptions.Impersonation = ImpersonationLevel.Impersonate;
            connOptions.EnablePrivileges = true;
            ManagementScope manScope = new ManagementScope(String.Format(@"\\{0}\ROOT\CIMV2", NetworkName), connOptions);
            manScope.Connect();
            ProcessName = ProcessName + ".exe";

            using (var searcher = new ManagementObjectSearcher(manScope, new SelectQuery("select * from Win32_Process where Name = '" + ProcessName + "'")))
            {
                foreach (ManagementObject process in searcher.Get())
                {
                    process.InvokeMethod("Terminate", null);
                }
            }
        }
        catch (ManagementException err)
        {
            //Do something with error message here
        }

Upvotes: 1

Earth
Earth

Reputation: 3571

Use the Count property to check, whether it contains any record. That is, if(searcher.Get().count == 0) returns true, means no record is present.

Upvotes: 0

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