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

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. :)

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

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(); } } 

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.

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.

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); } }