This question already has answers here:
How to stop C# console applications from closing automatically? [duplicate]
(9 answers)
Closed 3 years ago.
Im running .NET Core 2.2 and just want to create a simple Console Application that reads one value and prints it out. Yes i know there is millions of examples of this but my problem is that none of them works for some reason. When i press Enter the application stops.
Here is the simple code that just writes the first line but then do nothing:
static void Main(string[] args)
{
Console.WriteLine("I want to write a value here");
var theValue = Console.ReadLine();
Console.WriteLine(theValue);
}
Is there any configuration i have to do in Visual Studio 2017 to make the Console read my value i write? Or anything else that makes the Console close and program to end when i press enter?
The application doesn't stop, It simply ends since it prints out the result of your line and moves to next line since there is no more code to run it simply closes the application
Add Console.ReadLine(); on the end so that it doesn't close after first enter
static void Main(string[] args)
{
Console.WriteLine("I want to write a value here");
var theValue = Console.ReadLine();
Console.WriteLine(theValue);
Console.ReadLine();
}
you need to make the app wait and not exit using an additional Console.Read. Try like:
var theValue = Console.ReadLine();
Console.WriteLine(theValue);
Console.Read();
Related
This question already has answers here:
How to stop C# console applications from closing automatically? [duplicate]
(9 answers)
Closed 2 years ago.
static void Main(string[] args)
{
string name01;
string name02;
Console.WriteLine("Welcome to Choice RPG! <press enter to start your adventure>");
Console.ReadKey();
Console.WriteLine("Enter your Adventurers name! <press enter to continue>");
name01 = Convert.ToString(Console.ReadLine());
Console.WriteLine(name01 + "! come on, you can think of a better name than that can't you? <press enter to continue>");
Console.ReadKey();
Console.WriteLine("Enter your Adventurers name! <press enter to continue>");
name02 = Convert.ToString(Console.ReadLine());
if (name02 == name01)
{
Console.WriteLine("Wow, i guess you really like that name huh, fine.");
}
else
{
Console.WriteLine("Now thats more like it!");
}
}
This is my first project with programming in general. I am making an RPG game in which you choose your adventure and this is for the user's ingame name.
Everything works up until the if statement (after that the cmd just closes). If anyone has any ideas to fix it please tell me.
Code looks OK to me, try adding:
Console.WriteLine("Press <ENTER> to exit");
Console.Readline();
at the end to see if the message you want to show, actually shows before the application exits and closes. My guess is you are running in Visual Studio, and the message prints, but then the execution window closes so fast you don't see it.
On Visual Studio, the C# Console application keeps on terminating when I try to run a program. I tested this by just writing Hello World, shown here:
(screenshot of what I wrote)
When I run it, the command prompt window appears for a second, then immediately closes. Is there a way to fix this?
When a console application runs it executes the code and exits, console applications do not have a message loop to keep them alive, it is the same as creating a batch file and double clicking it, the command window will open and then close when execution finishes. If you want then console window to hang around afterwards then you need to use Console.ReadLine(); which will wait for user input before closing (i.e. pressing Enter).
You code (which should be in your question) simply outputs some text to the console and then exits.
Suggested reading Creating a Console Application
class Program
{
static void Main (string[] args)
{
Console.WriteLine("Hello World");
Console.ReadLine();
}
}
The application is not crashing, it runs and then exits. If you want read the output after it's done you can use Console.ReadLine();
using System;
namespace Hello_World
{
class Program
{
static void Main (string[] args)
{
Console.WriteLine("Hello World");
Console.ReadKey();
}
}
}
The issue is not crashing really but that all the instructions are executed then the program exits. If you desire to pause, you could insert the statement:
Console.ReadKey();
which will wait for you to type a key to exit.
This question already has answers here:
Console application closes immediately after opening in visual studio
(5 answers)
Closed 6 years ago.
I have a little console application which outputs a single line. When I run the program from within a console instance I am able to see the result because the command pormpt reappers after completion of the program. But when I start the program from the "Run"-window ([Win]+[R]) the console window instantly disappears (because I have not built in a break and i don't want to build in a break unless it isn't launched by the commandline).
So how can I determine if the program was started from a command line or directly?
I don't think there a built-in way to find this out. However I think you could look up the parent process and use that as fairly good heuristic. A quick test shows that the parent process is "explorer" when started from Run (Win+R) or double clicking. It would probably be cmd or powershell any other time except when debugging in VS, then devenv will be the parent process. Obviously, if there are scenarios where other tools will start an instance of the process you may want to give a command line parameter to force a particular behavior.
You code would look something like this:
// Note: Adapted from Hans Passant's answer linked above.
private static string GetParentProcessName()
{
var myId = Process.GetCurrentProcess().Id;
var query = string.Format("SELECT ParentProcessId FROM Win32_Process WHERE ProcessId = {0}", myId);
var search = new ManagementObjectSearcher("root\\CIMV2", query);
var queryObj = search.Get().OfType<ManagementBaseObject>().FirstOrDefault();
if (queryObj == null)
{
return null;
}
var parentId = (uint)queryObj["ParentProcessId"];
var parent = Process.GetProcessById((int)parentId);
return parent.ProcessName;
}
static void Main()
{
/*
Program code here.
*/
if (string.Equals(GetParentProcessName(), "explorer", StringComparison.InvariantCultureIgnoreCase))
{
Console.ReadLine();
}
}
I don't think there is any way to programmatically determine how the console application was started.
If you want the application to behave differently in these different situations then I would suggest using arguments e.g.
MyApp.exe /keepopen
code:
static int Main(string[] args)
{
// Test if argument was supplied:
if (args.Any(a => a == "/keepopen"))
{
System.Console.ReadLine();
}
}
If you want the console to stay open when running from Visual Studio I believe you can use Ctrl-F5 to start without debugging.
This question already has answers here:
How do I convert a .NET console application to a Winforms or WPF application
(2 answers)
Closed 8 years ago.
I want to do some changes here, I want to convert this application to winforms. And i want to store these output into a text file, How can I do it? please help
using System;
using System.Threading;
public static class Program
{
public static void Main()
{
// Create a Timer object that knows to call our TimerCallback
// method once every 2000 milliseconds.
Timer t = new Timer(TimerCallback, null, 0, 1000);
// Wait for the user to hit <Enter>
Console.ReadLine();
}
private static void TimerCallback(Object o)
{
// Display the date/time when this method got called.
Console.WriteLine(DateTime.Now);
// Force a garbage collection to occur for this demo.
GC.Collect();
}
}
Output of this application.
Source Stackoverflow
Go to application > and change is Application type to Winform and then point start up object at Sub Main
Right click on the solution and select "Add Reference"
Select System.Windows.Forms and hit OK
I am new to programming and as seems to be traditional I tried to create a "hello world" program in C#; however, as soon as I run the program it closes.
This is my code inside:
main()
console.writeline("hello world");
console.writeline("enter name");
console.writeline("where is the frikin console");
It's really annoying and I know it might be something simple for the additional users but how do I keep the window open.
Use Console.ReadLine(); or Console.ReadKey(); at the end of your program to wait for the return key or for any key.
You can build your program and run the exe from the command line, that will allow you to see the output.
If you want the program to remain running then adding the Read() statement is the traditional approach, as others have already said.
If you just want to see it in debugging and do not want or need the read statement then place a breakpoint at the end of the program during a debug session.
It's really quite simple.
After this line of code:
Console.WriteLine("where is the frikin console");
You need to add this:
Console.ReadLine();
That should work.
The reason the console closes is because you told it to write some stuff to the screen, after it has finished writing what you told it to write it simply closes itself all in the fraction of a second. if you add Console.ReadLine, the console will wait for you to input something before closing, like pressing a key on the keyboard.
Try adding Console.Read(). You need to pause execution somehow.
Console.WriteLine("hello world");
Console.WriteLine("enter name");
Console.WriteLine("where is the frikin console");
Console.ReadLine();
Console.ReadLine(); will close the console after you've hit (for example) enter.
Console.ReadKey(); will close the console after the next key-hit
You can read the console-contents with these methods,too
Console.WriteLine("hello world");
Console.WriteLine("enter name");
string name = Console.ReadLine();
Console.WriteLine("Your name is: " + name);
Console.ReadLine();
add below line at the end
Console.ReadLine();
You could use CTRL + F5 which will opens the command line and after execution of your code, it shows Press any key to continue.... This will be handy for you than adding few lines of code additionally.
Use
Console.ReadLine();
in the end of your code. You are having this problem because the program just write the message then it ends, that's why you can't see anything. By adding that line, you keep the program waiting something to be typed and you can read the message. After this, type something to end the program.
The window automatically closes after your program, you need to let it take some input, for example:
Add
Console.ReadLine();
Which takes a line of input (till "\n"). And your program will wait until somebody hit the return key (they can type anything and the program won't close: until you hit the return key. You can type in "hello world back what's up are you ok?" and nothing will happen.)
or
Console.ReadKey();
Which will take a character of input. This will make your program wait for the user to press any key and then closes.