3

How can I read from standard input and write to standard output. System.Diagnostics.Process.StandardInput's MSDN reference didn't help as it separately starts the process and then redirects the Standard Input/Output but what If the process is already running and called my Application to feed it some data. Here's an example to make things a bit clear:

I am simply using Unix pipes i.e. cat command in cygwin (A Linux like Environment for windows) that basically just reads standard input and print to standard output. following is the command:

% cat input/sample.txt | src/csharp/maptest

But that doesn't seems to work.

If some one know ruby here as i don't here's what i want to do the same in C#: 

#!/usr/bin/env ruby 

STDIN.each_line 
do |line| 
some code here 
end

And here's some python equivalent code that i want to accomplish in c# or vb.net: 

#!/usr/bin/env python 

import re 
import sys 

for line in sys.stdin: 
val = line.strip()

Any solutions?

Thanks in advance.

Improve this question

3 Answers 3

Reset to default
9

You're looking for the static methods in the Console class :

  • System.Console.In encapsulate the standard input stream
  • System.Console.Out encapsulate the standard output stream
Improve this answer
Sign up to request clarification or add additional context in comments.

1 Comment

+1 yes, but this has all gotten slightly off-topic since you wrote this
2

Pointers to documentation for System.IO.Pipes are a red herring here.

If you just want the ability to have a process pipe its standard output to another process's standard input, then this works the same as you would expect provided the target process is written to read input from standard input. For example I can do 

dir /b /s c:\*.* | findstr exe

to find all executable files on my C: drive.

All you need to do therefore is to build your maptest application so that it reads from standard input, in other words it must accept input via the Console.Read* methods as mentioned in other answers. See this previous question for an earlier discussion

C# Console receive input with pipe

Improve this answer

1 Comment

Thanks a lot for your help Steve, really appreciate it!
0

You can't use Console.ReadLine() and Console.WriteLine()?

Never mind the above. Have you tried System.IO.Pipes? Here's the MSDN documentation.

Improve this answer

9 Comments

I think he means starting another process from inside an application and accessing standard input/output for that process.
@Matthew No that doesn't seems to work either and same goes with Console.In and Console.Out. All I need is a way to read the standard input and write to standard output.
It's difficult to tell exactly, but I got the impression he meant that the program he's creating is going to be fed info from std::in
@Nelson Some application called my application and then my application should read data from standard input.
I need to clean my glasses. I should have realized that he said pipes.
|

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Start asking to get answers

Find the answer to your question by asking.

Ask question

Explore related questions

See similar questions with these tags.