C# ProcessStart - How to automatically press the Y key

You can try using this:

http://inputsimulator.codeplex.com/

How about;
SendKeys.Send("{Y}");

SendKeys only work with windows applications
You  redirected stdin so your can write strings to a stream and the console
will read it from std in like normal

What?

something like this:

sIn.WriteLine("Y");
sIn.Flush();      

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If SendKeys.Send("{Y}") doesn't help you then try the InputSimulator.
The InputSimulator should also solve your problem.

You can also redirect StandardInput and not StandardOutput, wait for a second, and then write a "Y" to StandardInput - this is much simpler but has the downside that you might send the "Y" too early, and won't be able to know if something went wrong.

using System;
using System.Diagnostics;
using System.Text;
using System.Threading;

class Program
{
	static void Main(string[] args)
	{
		Process proc = new Process();
		// Run the command "del c:\temp" in a DOS window
		// This will show a confirmation prompt requiring 
		// us to send a "Y" to continue
		proc.StartInfo.FileName = "cmd.exe";
		proc.StartInfo.Arguments = @"/c del c:\temp\*";

		// Redirect standard input
		proc.StartInfo.RedirectStandardInput = true;

		// UseShellExecute must be false to redirect input
		proc.StartInfo.UseShellExecute = false;

		// Start the process
		proc.Start();

		// Wait a second
		Thread.Sleep(1000);

		// Write a "Y" to the process's input
		proc.StandardInput.WriteLine("Y");

		// Now that we've sent the confirmation "Y" wait for the process to exit
		proc.WaitForExit();

		Console.WriteLine("The process finished with ExitCode: {0}", proc.ExitCode);
		Console.Write("Press any key to exit...");
		Console.ReadKey();
	}
}

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It appears I have to press ENTER after the Y.
How can I press ENTER.
thx again

The following does not help

  proc.StandardInput.WriteLine("Y");
                         proc.StandardInput.WriteLine();
                         proc.StandardInput.Flush();


Still requires a manual enter

????????

Post your code.

 ProcessStartInfo _psi = new ProcessStartInfo("pgp.exe");
                _psi.WorkingDirectory = ConfigurationSettings.AppSettings["UpLoadLocation"];
                _psi.UseShellExecute = false;
                _psi.RedirectStandardInput = true;
                _psi.RedirectStandardOutput = true;
                _psi.RedirectStandardError = true;

                _psi.CreateNoWindow = false;

                 _psi.Arguments = " -e " + _zipFile + "  MYKEY.asc  MYEMAIL   +force  ";

                 System.Diagnostics.Process proc = System.Diagnostics.Process.Start(_psi);

                 StringBuilder procOutput = new StringBuilder();

                 // Read the process's output until we see the
                 // "Are you sure?" prompt and then send a "Y"
                 while (!proc.StandardOutput.EndOfStream)
                 {
                     // Read up to 1024 characters into the char[] array "buffer"
                     char[] buffer = new char[1024];
                     proc.StandardOutput.Read(buffer, 0, buffer.Length);

                     // Append the chars we just read to the procOutput StringBuilder
                     procOutput.Append(buffer);

                     // Check if procOutput ends with "Are you sure (Y/N)?"
                     if (procOutput.ToString().Contains("(y/N)?"))
                     {
                         // If so send "Y" and exit this loop
                         proc.StandardInput.WriteLine("Y");
                         proc.StandardInput.WriteLine();
                         proc.StandardInput.Flush();
                         break;
                     }
                 }

                 // Now that we've sent the confirmation "Y" wait for the process to exit
                 proc.WaitForExit();

Does pgp.exe not have a command line to suppress confirmation prompts?  There should be a BATCHMODE option, intended specifically for this purpose...

I think it does... checking now.......
thx!

Maybe --force?

I'm doing a force and batchmode... get a Encryption error.......  

Says it skipping the Y/N but get an encryption error...

I'm not particularly familiar with PGP - are you sure the rest of the command line is correct? Are you testing it in a cmd window by hand before trying to run it in your C# code?

Yes.. that's exactly what I've been doing
thx

Well, if that switch doesn't work out for you I've updated the code slightly to be more accurate:

ProcessStartInfo _psi = new ProcessStartInfo("pgp.exe");
_psi.WorkingDirectory = ConfigurationSettings.AppSettings["UpLoadLocation"];
_psi.UseShellExecute = false;
_psi.RedirectStandardInput = true;
_psi.RedirectStandardOutput = true;
_psi.RedirectStandardError = true;

_psi.CreateNoWindow = false;

_psi.Arguments = " -e " + _zipFile + "  MYKEY.asc  MYEMAIL   +force  ";

System.Diagnostics.Process proc = System.Diagnostics.Process.Start(_psi);

StringBuilder procOutput = new StringBuilder();

// Read the process's output until we see the
// "Are you sure?" prompt and then send a "Y"
while (!proc.StandardOutput.EndOfStream)
{
	// Read up to 1024 characters into the char[] array "buffer"
	char[] buffer = new char[1024];
	// Store the number of characters actually read
	// (since it will undoubtedly be less than 1024)
	int charsRead = proc.StandardOutput.Read(buffer, 0, buffer.Length);

	// Append the chars we just read to the procOutput StringBuilder
	// Use "charsRead" to only append the part of the buffer[] array
	// that was filled, otherwise we'd end up appending a couple
	// characters that Read() filled followed by a bunch of nulls
	procOutput.Append(buffer, 0, charsRead);

	// Check if procOutput ends with "Are you sure (Y/N)?"
	if (procOutput.ToString().Contains("(y/N)?")) // Make sure this is actually "(y/N)?" and not "(y/N) ?"
	{
		// If so send "Y" and exit this loop
		proc.StandardInput.WriteLine("Y");
		proc.StandardInput.WriteLine();
		proc.StandardInput.Flush();
		break;
	}
}

// Now that we've sent the confirmation "Y" wait for the process to exit
proc.WaitForExit(); 

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Making that batch mode work is your best bet, though.

...You can also omit lnes 37 & 38 in that example (the WriteLine method automatically appends a CRLF).

I think the issue is that I'm using an old PGP exe and the batchmode sucks...
Will try with a new PGP exe.. thanks for you help