Detecting a Process is already running in windows using C# .net

Question

How do I detect if a process is already running under the Windows Task Manager? I'd like to get the memory and cpu usage as well.

Answer 1

Have you looked into the System.Diagnostics.Process Class.

Answer 2

You could use WMI to query something along the lines of

"SELECT * FROM Win32_Process WHERE Name = '<your process name here>'"

Especially processor usage is a bit tricky with WMI, though. You are probably better off with System.Diagnostics.Process, as Ian Jacobs suggested.

Answer 3

Simple example...

bool processIsRunning(string process)
{
    return (System.Diagnostics.Process.GetProcessesByName(process).Length != 0);
}

Oops... forgot the mem usage, etc...

bool processIsRunning(string process)
{
System.Diagnostics.Process[] processes = 
    System.Diagnostics.Process.GetProcessesByName(process);
foreach (System.Diagnostics.Process proc in processes)
{
    Console.WriteLine("Current physical memory : " + proc.WorkingSet64.ToString());
    Console.WriteLine("Total processor time : " + proc.TotalProcessorTime.ToString());
    Console.WriteLine("Virtual memory size : " + proc.VirtualMemorySize64.ToString());
}
return (processes.Length != 0);
}

(I'll leave the mechanics of getting the data out of the method to you - it's 17:15 here, and I'm ready to go home. :)

Answer 4

You can use System.Diagnostics.Process Class. There is a GetProcesses() and a GetProcessesByName() method that will get a list of all the existing processes in an array. The Process object has all the information you need to detect if a process is running.

Answer 5

If you wanted to find out about the IE Processes that are running:

 Process[] ieProcs = Process.GetProcessesByName("IEXPLORE"); System.Diagnostics.Process[] ieProcs = Process.GetProcessesByName("IEXPLORE");

                    if (ieProcs.Length > 0)
                    {
                        foreach (System.Diagnostics.Process p in ieProcs)
                        {                        
                            String virtualMem = p.VirtualMemorySize64.ToString();
                            String physicalMem = p.WorkingSet64.ToString();
                            String cpu = p.TotalProcessorTime.ToString();                      
                        }
                    }

Answer 6

Something like this:

 foreach ( WindowsProcess in Process.GetProcesses) { 

        if (WindowsProcess.ProcessName == nameOfProcess) { 
            Console.WriteLine(WindowsProcess.WorkingSet64.ToString); 
            Console.WriteLine(WindowsProcess.UserProcessorTime.ToString); 
            Console.WriteLine(WindowsProcess.TotalProcessorTime.ToString); 
        } 
    }