Monitoring Process CPU usage using WMI

[eli15021979]

Hi, I'm trying to write an application which monitor another application using WMI. One of the parameter I need to monitor is CPU usage by the monitored application. Just for the test - The tested process is devenv.exe(i.e Visual studio). When running the application and printing to the outout window I see that the process CPU usage is 0%(while the task manager shows 20-30%). Note that other parameters are OK(for example Virtual memory , Thread count etc.). This is my code to get all parameters related to devenv.exe:

    private void MonitoringTimer\_Tick(object sender, EventArgs e)
    {
        ObjectQuery winQuery = new ObjectQuery("SELECT \* FROM Win32\_PerfFormattedData\_PerfProc\_Process WHERE Name = 'devenv'");
        ManagementObjectSearcher searcher = new ManagementObjectSearcher(winQuery);
        foreach (ManagementObject item in searcher.Get())
        {
            string s = "";
            foreach (PropertyData PC in item.Properties)
            {
                if (PC.Value != null)
                {
                    s = PC.Name + " : " + PC.Value.ToString();
                }
                else
                {
                    s = PC.Name + " : NULL";
                }
            }
            s = "\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*";
        }
   }

Can anyone help me solve this problem? With best regards, Eli

[Michael Bookatz]

I've found that when using WMI you need to use NextValue() as opposed to Value. Try that and see if it works.

[eli15021979]

Hi, Thanks for your reply. I'm looking for NextValue() and I can't find it(not in PropertyData and not in ManagementObject)... :sigh: Thanks again, With best regards, Eli