Sending"enter" in console project

Question

Hello, In form programs, I can send 'enter' command like this; SendKeys.Send( '{ENTER}' ); But I couldnt send 'enter' in a console programs. How can I do that?

Vulpes · Answer

SendKeys does in fact work with a console application though you need to force focus onto it first. Try the following example. First save this console program as keysreceiver.cs and then compile to keysreceiver.exe: using System; class Test { static void Main() { string keys = Console.ReadLine(); // waits to receive input Console.WriteLine(keys + " world"); Console.ReadKey(); // press any key to exit program } } Now save this console program as keyssender.cs and then compile to keyssender.exe: using System; using System.Diagnostics; using System.Runtime.InteropServices; using System.Windows.Forms; class Test { [DllImport("user32.dll")] static extern bool SetForegroundWindow(IntPtr hWnd); static void Main() { Process[] procs = Process.GetProcessesByName("cmd"); foreach(Process proc in procs) { if (proc.MainWindowTitle == "Command Prompt - keysreceiver") { SetForegroundWindow(proc.MainWindowHandle); SendKeys.SendWait("Hello~"); Console.WriteLine("Hello sent to keysreceiver"); return; } } } } Next start keysreceiver running in one console window. Now start keyssender running in a different console window. In the first console window, you should see the following appear: Hello Hello world

Vulpes · Answer

I recall that you were having problems with telnet in a previous thread ( http://www.c-sharpcorner.com/Forums/Thread/124511/using-command-linecmd-exe.aspx ). I don't know whether you subsequently managed to solve them but the synchronization issues may be even worse now you are trying to send it keystrokes from a different process than they were before. The important thing is to keep the input focus on telnet whilst you're sending it the keys otherwise SendKeys won't work. This may mean having to call SetForegroundWindow repeatedly if you need to switch back to your other application to input the keys to send. Unless Sam can think of a different approach, there isn't really an easier way to do this. There are unmanaged alternatives (SendInput and keybd_event) to SendKeys but there's no reason to think they'd be any better and they're certainly not as easy to use from C#.

yokzu · Answer

Thanks for your reply Vulpes. Im doing telnet to some devices and for some reason, program is stopping and when I hit "enter", then its continue again. Isn't there any simple way to do this?

Morcos Adel · Answer

that depends in what you wanna you use it? i mean if you wanna send "Enter" for a new line...you can use "
" new line

Sending"enter" in console project

Answers (4)