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POSending input/getting output from a console application (C#/WinForms)
 

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    <p>I have a form with 3 controls:</p> <ol> <li>A textbox for the user to enter commands to send to a console application,</li> <li>A button to confirm the commands to be sent and</li> <li>A read-only textbox to display the output from the application.</li> </ol> <p>What I want is for the user to enter commands in the first textbox, press the button to enter and receive feedback via the second textbox.</p> <p>I know how to use <code>ProcessStartInfo.RedirectStandardOutput</code> but, however, the app hangs when I use <code>StandardOutput.ReadToEnd()</code>. </p> <p>I had a look at the asynchronous <code>Process.BeginOutputReadLine()</code> but, even though my app does not hang, somehow I get no response in the textbox, it does absolutely nothing.</p> <p>Here's my code:</p> <pre><code>public partial class MainForm : Form { private void MainForm_Load(object sender, EventArgs e) { InitializeInterpreter(); } private void InitializeInterpreter() { InterProc.StartInfo.UseShellExecute = false; InterProc.StartInfo.FileName = "app.exe"; InterProc.StartInfo.RedirectStandardInput = true; InterProc.StartInfo.RedirectStandardOutput = true; InterProc.StartInfo.RedirectStandardError = true; InterProc.StartInfo.CreateNoWindow = true; InterProc.OutputDataReceived += new DataReceivedEventHandler(InterProcOutputHandler); InterProc.Start(); } private static void InterProcOutputHandler(object sendingProcess, DataReceivedEventArgs outLine) { if (!String.IsNullOrEmpty(outLine.Data)) { OutputTextBox.Append(Environment.NewLine + outLine.Data); } } private void Enterbutton_Click(object sender, EventArgs e) { InterProc.StandardInput.Write(CommandtextBox.Text); InterProc.BeginOutputReadLine(); } } </code></pre> <p>Is there any way I can have this run smoothly? Thanks.</p>
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    1. CO<dumb comment>You know you can do this without redirecting standard in/out?</dumb comment> I assume you're testing how re-direction works, but you haven't stated that in your question at all.
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    2. COCan you please elaborate on that?
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    3. COBy "What I want is for the user to enter commands in the first textbox, press the button to enter and receive feedback via the second textbox" do you actually mean "enter a command (which would normally run in a command prompt/"dos" window), run the command in the background, and show the commands output in the second text box"? If so ignore what I just said.
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