So I’m learning about C# with visual Studio, I wrote a small program kind of like a “hello world”,
I remember that with C++ md Java there is a conman you wrote at the end of your code o hav the command window stay on after the program finishes running. My question is, or C#, what is that code or command I’m supposed to write so that when I debug it and it runs the command window doesn’t closes after I finish with he user input?
You are looking for:
Console.Write("\nPress any key to continue... ");
Console.ReadLine();
This will keep window open until you press Enter key
Related
I have a console Application Program on Visual Studio 2013.
.NET 4.5
I want the program to quit after doing a Certain task. SO, I use
System.Environment.Exit(0);
but it does not exit. It only displays on the console:
Press any key to continue.
How can i exit the Program?
Thanks in Advance.
Here iam checking if directory is empty, then exit the program, I also tried to put System.Environment.Exit(0); in the main function but it did nothing.
if (Directory.GetFiles(#"Q:\").Length == 0)
{
System.Environment.Exit(0);
}
Press any key to continue
Like a comment above said already, this sounds a lot like what your IDE (presumably Visual Studio) would print out once the process has terminated. On my machine, I get this message when I run a console application without attaching the debugger to it, e.g. by starting it with Ctrl+F5. Once I press a key, the console window spawned by Visual Studio will close. This is expected behaviour.
Try running your program with the debugger attached, e.g. by pressing F5. Or start the program from a command prompt instead of starting it from your IDE. The message shouldn't be displayed then.
Note also that if you have a multi-threaded program, and there are non-background threads running, these can keep a process alive even though the main thread has terminated.
The most graceful way to exit a console application is to return from the Main method.
Simply declare your main method as follows:
public static int Main(string[] args)
and you can use
return x;
to exit the application with the given return code.
try Application.Current.Shutdown()
I just wrote a clever program called helloworld. It's a C#/.NET 4.5 console app. Deep within the twisted nested mazes of logic there's use of Console.WriteLine().
When I'm running this at a command line, it runs and I see the output. I can do other commands and mess around a bit, and later scroll up to see the output again.
Now I'm in Visual Studio, tweaking the source ("Hi" is more efficient than "Hello") and testing by tapping F5. What happens is a console window pops up and immediately vanishes. I have no idea what the program printed. How can I see the output?
I don't want to modify my source at all. After searching for solutions, I find some who say to use Console.ReadKey() - but then it would suck to be using the program at the command line. There's no real reason the user should have to tap a key when the program has already done its work. Even if i go with this, there's the problem of the output disappearing when the console window closes after a key tap.
I don't want to use Debug.WriteLine() which does write to the output window in VS, but doesn't write ordinary output for the end user to see.
I have discovered ctrl-F5, which runs the program as if it had a final Console.ReadKey() line, but there's still the problem of when I tap any key, all the output vanishes along with the window. Three minutes later, I'm thinking "Oh wait, did it print 'Hello' or 'Helo'?" No way to check.
Seems like the Visual Studio IDE should somehow capture all that a freshly built program writes to its stdout or the Microsoft equivalent thereof, and show it in its "Output" panel, or some panel, for later scrutiny. Maybe it does do this, and I don't yet know the trick to it? Seems like this would be a common desire among millions of C# developers.
If you're working on a .NET Core console application (or .NET Framework via the .NET SDK) using Visual Studio 2019, the behaviour of leaving the console window open after the program has executed will now happen by default:
Specifically:
This should prevent the need to add Console.Read() calls to console apps to prevent the console window from closing immediately after the program has finished executing. The launched console window is also re-used for subsequent runs, so if you’re used to using ctrl+f5, you won’t have lots of console windows to close after you’ve launched your application a few times.
The reason it closes automaticly is because it's done running the program. If you want to see what it did, make it need a new command like hitting any key. The Console.ReadKey(); pauses it and waits for a User to hit a key to continue. Put that command after the commands of instruction you are doing and it will pause it until you hit any key.
Console.ReadKey(); // Pauses until you hit any key
You can also run your program pressing F10 (executes one line by one), with F11 (goes inside a function).
The other option you have is to set breakpoints in Visual Studion and run the program by pressing F5 - it will stop at the next breakpoint. And the breakpoints can have conditions - i.e. conditional breakpoints.
Some options are:
1. wrap #if DEBUG around Console.ReadKey()
2. run directly from an open terminal
3. create a Test project - but again you'll need Console.ReadKey() to stop it closing.
Using WinForms application, I would like it to show some help (when asked && started from console). In Main, I use kernel32's AttachConsole(-1), write some info using standard Console.WriteXXX(...) and then kernel32's FreeConsole().
Problem:
After the application exits, the standard console prompt (the current directory) is not restored, the cursor stays blinking on last line (written by the application). After pressing the Enter key, the prompt is restored. It seems like the application waits until the key is pressed, but it does not, because any key press is interpreted already by the console.
Any tips what I'm doing wrong?
I have a .Net windows C# application, fairly complete and working, that I have been asked to support calling it from another program like LabView. I have added the ability to parse command line arguments at startup so I can detect that it is supposed to behave like a console application and be provided with enough information to function.
What I would like to do is have the program print out to the console its results and have the calling program pipe it or just pull the data and use it.
The printing to the console works fine but when I start the program up, it tells the command prompt window that it is done (a new prompt immediately shows up and the command prompt is waiting for input). In the process it also closes the redirection that was part of the startup line. Is there anyway to keep it from telling the calling program that it has completed before it has actually finished?
The simple solution is to pass a file to save the data to but I would prefer not to have to do that. I could also do a separate version that is a console app, but that means supporting two separate programs.
Thanks
Instead of invoking the program directly, you can use cmd /c myapp.exe.
I know I can use Console.ReadKey(); or Console.ReadLine(); to wait for the user input.
I am following some video tutorials from youTube
There I notice that when the tutor writes some code like
Console.WriteLine("This is a basic C# tutorial");
He gets a message saying Press any key to continue...
So, I want to know how to get the above message without writing any code for displaying the message.
Run without debugging sounds like what you want. Ctrl + F5.