How to redirect the STD-Out of an existing process in C#

Question

I can easily start a process with it's STD I/O redirected but how can I redirect the STD I/O of an existing process.

Process process = Process.GetProcessById(_RunningApplication.AttachProcessId);

process.StartInfo.RedirectStandardOutput = true;
process.StartInfo.RedirectStandardError = true;

string text = process.StandardOutput.ReadToEnd(); //This line blows up.

Exception:

StandardOut has not been redirected or the process hasn't started yet.

Side note: If you know how to do this in C/C++ I'd be happy to re-tag and accept. I just need to know if it's even possible.

I'm not sure if you can do this without the cooperation of the other process, but if you can arrange such cooperation, then http://stackoverflow.com/questions/1692987/redirect-stdout-to-an-edit-control-win32 may help (since you said C/C++ was okay!). Problem is that SetStdHandle applies only to the executing process... — itowlson, Jul 07 '11 at 22:49

Nate Zaugg · Accepted Answer · 2011-07-07T22:55:43.010

2

It doesn't look like it's possible in C#. Looking at possibility in C++.

EDIT: You can use named pipes in C# and that may be a better way to get IPC if that is what you are trying to accomplish.

edited Jul 07 '11 at 22:55

answered Jul 07 '11 at 22:47

Nate Zaugg

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I'm going to have to agree with you. It doesn't look like its possible. I was already using names pipes for a few of the other IPC streams anyway so I just adopted them for this as well. Many thanks! – NTDLS Jul 08 '11 at 23:00

How to redirect the STD-Out of an **existing** process in C#

1 Answers1

How to redirect the STD-Out of an existing process in C#