C# Monitor Programs Periodically Based on PID

Question

Thank you in advance for you ideas and input.

I would like to periodically check to see if a third party program is currently running on a user's system from my program. I am currently launching the program as follows in C#:

        String plinkConString = ""; // my connection string
        Process plink = Process.Start(utilityPath + @"\putty.exe", plinkConString);
        int plinkProcessId = plink.Id;

I launch the program and grab its pid in a Windows environment. As Putty/PLink may disconnect from its SSH server at some point and close, what is the best way to monitor how this process is doing in code?

Is there a better way to launch this program to monitor its success or failure?

Answer 1

If you want to check whether the process is still up and running you can check the HasExited property:

Process plink = Process.Start(utilityPath + @"\putty.exe", plinkConString);
....
bool isRunning = plink.HasExited;

The following code would check whether putty is running. It works also, if the program has been started by the user:

bool isRunning = Process.GetProcessesByName("putty").Length > 0;

Answer 2

You can use Process.WaitForExit() or Process.WaitForExit(int), or use the Process.Exited event handler. You may also be interested in Monitor if you want any more complex behaviour than that.