Process with ProcessWindowStyle.Hidden still shows Press any key to exit?

Question

I have this:

        var startInfo = new ProcessStartInfo
                            {
                                FileName = _pathToExe,
                                RedirectStandardOutput = true,
                                RedirectStandardError = true,
                                RedirectStandardInput = true,
                                UseShellExecute = false,
                                WorkingDirectory = FilepathHelper.GetFolderFromFullPath(_pathToExe),
                                CreateNoWindow = true,
                                WindowStyle = ProcessWindowStyle.Hidden
                            };

        try
        {
            using (_proc = Process.Start(startInfo))
            {
                _proc.EnableRaisingEvents = true;
                _proc.ErrorDataReceived += proc_DataReceived;
                _proc.OutputDataReceived += proc_DataReceived;
                _proc.BeginErrorReadLine();
                _proc.BeginOutputReadLine();

                var myStreamWriter = _proc.StandardInput;

                var allArgs = "";
                foreach (var arg in _args)
                    allArgs += arg + Environment.NewLine;

                myStreamWriter.Write(allArgs);
                _proc.WaitForExit();
            }
        }
        catch (Exception e)
        {
            Console.WriteLine(e);
        }

And I am executing an *.exe that someone else wrote. For this particular *.exe - even though you can clearly see above that I have set ProcessWindowStyle.Hidden, I still see a black window appear with the words "Press any key to exit.". This *.exe - if I run from the command line (instead of calling it from my C# code) produces a tremendous amount of console output text. I do not see this output text when I run my C# code, which is what I want and also means the redirection is working.

I checked and the process is finished - it's as if the command window itself is adding this extra (undesirable) step.

Has anyone encountered this before and if so how can I get rid of this?

Isn't this is what you are looking for? http://stackoverflow.com/questions/186822/capturing-console-output-from-a-net-application-c — Sergey Vyacheslavovich Brunov, Feb 01 '12 at 19:50
No, that link is about redirection. I don't have an issue with redirecting. Any other links?? Someone has got have a solution to this. — sapbucket, Feb 02 '12 at 00:04

score 0 · Answer 1 · answered May 20 '21 at 01:05

0

From Document:

To use System.Diagnostics.ProcessWindowStyle.Hidden, the system.Diagnostics.ProcessStartInfo.UseShellExecute property must be true.

answered May 20 '21 at 01:05

Shannon

54
1
11

score 0 · Answer 2 · answered Feb 01 '12 at 20:24

It seems that the program you are starting is calling system("PAUSE") at the end thus spawning a new process which prints the "Press Any Key to Continue..." message and waits for user input. I cannot reproduce the exact situation of yours but you can try this.

        var startInfo = new ProcessStartInfo
        {
            FileName = "cmd.exe", 
            RedirectStandardOutput = true,
            RedirectStandardError = true,
            RedirectStandardInput = true,
            UseShellExecute = false,
            CreateNoWindow = true,
        };

        try
        {
            Process _proc;
            using (_proc = Process.Start(startInfo))
            {
                _proc.EnableRaisingEvents = true;
                _proc.BeginErrorReadLine();
                _proc.BeginOutputReadLine();

                var myStreamWriter = _proc.StandardInput;

                myStreamWriter.WriteLine("D:\\your.exe"); //write your.exe to cmd and press enter :) 
                _proc.WaitForExit();

            }
        }
        catch (Exception e)
        {
            Console.WriteLine(e);
        }

Sorry, this isn't the solution. You fundamentally changed my question by switching FileName to cmd.exe. — sapbucket, Feb 02 '12 at 00:02
You can start cmd.exe and then run your.exe within it with the help of myStreamWriter. This is the same as running your.exe directly but in the context of cmd.exe's console. You can then wait for the "Press any key to continue..." string to be read indicating the process has done its job and than close it. — Mihail Shishkov, Feb 02 '12 at 08:20

Process with ProcessWindowStyle.Hidden still shows Press any key to exit?

2 Answers2