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PORedirectStandardIn Stops Output
 

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  1. PORedirectStandardIn Stops Output
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    <p>I have a GUI that wraps a console application to improve user experience. I'm using the Process class to spin off the console executable. I want the console window to come up, and I will manually write abbreviated output to it. Then, once the executable is finished, the console window will close and control passes back to the GUI.</p> <p>However, it is an interactive program, requiring me to redirect both StandardIn and StandardOut. The problem is that the very act of redirecting the input stops all output from coming to the console.</p> <p>I've included all the output code as I had it, but commented out. As it is, a console window will open and the prompts will appear, waiting for user input. If I uncomment RedirectStandardIn, the window appears, but simply remains blank. Am I misunderstanding the role of Process.StandardInput?</p> <pre><code>class HandleExecutable { ... public void callExecutable(string executable, string args, string inputStr) { string commandLine = executable; ProcessStartInfo psi = new ProcessStartInfo(commandLine); psi.UseShellExecute = false; psi.LoadUserProfile = false; //psi.RedirectStandardOutput = true; //psi.RedirectStandardError = true; /* UNCOMMENT BELOW WILL CAUSE NO OUTPUT TO BE PUT TO THE CONSOLE */ //psi.RedirectStandardInput = true; psi.WindowStyle = ProcessWindowStyle.Minimized; psi.Arguments = args; Process p = new Process(); p.StartInfo = psi; try { p.Start(); //p.StandardInput.WriteLine(inputStr); //p.BeginOutputReadLine(); //p.BeginErrorReadLine(); if (outputHandler != null) p.OutputDataReceived += outputHandler; if (errorHandler != null) p.ErrorDataReceived += errorHandler; p.WaitForExit(); p.Close(); p.Dispose(); } catch (Exception ex) { Console.Error.WriteLine(ex.Message); } } } </code></pre>
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    1. USvenerik
    1. UScrand6
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    1. COJust a hunch: read some output from your process before you send in some input.
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      1. USspender
    2. COI tried - it stills hangs at a blank console screen. However, then if I close the console window, my OutputDataReceived event handler gets called (with a null string).
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      1. UScrand6
 

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