Question

I have opened five notepad.exe’s. Now I want to know all the process id’s associated with each notepad.exe.

I know I can retrieve list of notepad processes by:

Process[] processes = Process.GetProcessesByName(“notepad”);

But now I want string[] of process Id’s of those notepad instances using LINQ. How do I do that? I know i can create string[] and using foreach loop populate the string[] but I would like to know using LINQ.

Answer 1

You can use:

Process[] processes = Process.GetProcessesByName("notepad");
string[] ids = processes.Select(p => p.Id.ToString()).ToArray();

However, I question the need to put this into a string[] type. It might be better to just leave the Process.Id values as integers:

Process[] processes = Process.GetProcessesByName("notepad");
var ids = processes.Select(p => p.Id);
foreach(int processId in ids)
{
   // Do something with each processId
}