将提示输入发送到Diagnostics.Process

Question

I'm currently solving a problem of starting external tool from .net app. I have this part of code:

proc.StartInfo = new ProcessStartInfo(_app, _args);
proc.StartInfo.UseShellExecute = false;
proc.StartInfo.RedirectStandardInput = true;
proc.StartInfo.RedirectStandardOutput = true;
proc.StartInfo.RedirectStandardError = true;
proc.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;

But, after starting application I get an error to StandartError output witn promt confirmation answer "enter y/n". I've already tried to input "y" via standart input, right after starting process, but still get the same error.

 var standartInput = proc.StandardInput;
    standartInput.AutoFlush = true;
    standartInput.WriteLine("y");
    standartInput.Close();

I'd really appreciate any help. Thanks.

PS: PuTTY Secure Copy client - is the external app I'm using from code. There is a confirmation promt, when running app for first time to save servers fingerprint in system registry.

Answer 1

The code looks OK to me. Maybe you need to sleep for a second or something before writing the "y". I would imagine that the program takes a little while to ask the user for input