Question

I have this piece of code:

Process pLight = new Process();
pLight.StartInfo.UseShellExecute = false;
pLight.StartInfo.FileName = "MyCommand.exe";
//
pLight.StartInfo.Arguments = "-myparam 0";
pLight.Start();
//
pLight.StartInfo.Arguments = "-myparam 1";
pLight.Start();
//
pLight.StartInfo.Arguments = "-myparam 2";
pLight.Start();

The question is: a new process is “created” each time i invoke Start()?

From Process.Start documentation:

Returns true if a process resource is started; false if no new process resource is started (for example, if an existing process is reused).

but each time i invoke this method i get true. So how can I reuse the same process? Is there a way to run multiple commands using the same process?

Answer 1

pLightStartInfo = new ProcessStartInfo();
pLightStartInfo.UseShellExecute = false;
pLightStartInfo.FileName = "MyCommand.exe";
pLightStartInfo.Arguments = "-myparam 0";
pLightStart();
pLightStartInfo.Arguments = "-myparam 1";
pLightStart();
pLightStartInfo.Arguments = "-myparam 2";

Process pLight = new Process(pLightStartInfo); // first time so a new Process will be started

Process myOtherProcess = Process.Start(pLightStartInfo); // second time so myOtherProcess would reuse pLight, given original hadn't closed so both would be "pointing" at one MyCommand.exe

Never done it myself but that’s what it appears to mean.