CODEWITHSUNDEEP
c#visual-studio-code.net-coreubuntu-17.10
Olian04
Olian04

Reputation: 6862

Failing to read input from .net-core console application in vscode

I've been trying to get dotnet new console example project (for vscode) to work in Ubuntu 17.10.

I can get the default program to run:

using System;

namespace dotnet_console
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Hello world!");
        }
    }
}

But when i change it to read input as well, it gets really wonky...

using System;

namespace dotnet_console
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.Write("Name: "); // 1
            var name = Console.ReadLine(); // 2
            Console.WriteLine("Hello {0}!", name); // 3
        }
    }
}

The program builds, but it won't print Name:. However if i put breakpoints on line 1, 2 & 3, i can see that the program runs through ALL of them, but nothing prints. That is until i stop the debugging. Then it prints

Name:

The program '[16322] dotnet-console.dll' has exited with code 0 (0x0).

What is happening here? I'm guessing its a vscode thing, because it works as expected when ran from the terminal using dotnet run.

Upvotes: 12

Views: 4431

Answers (2)

Tobias Theel
Tobias Theel

Reputation: 3217

The Documentation states the following:

By default, processes are launched with their console output (stdout/stderr) going to the VS Code Debugger Console. This is useful for executables that take their input from the network, files, etc. But this does NOT work for applications that want to read from the console (ex: Console.ReadLine). For these applications, use a setting such as the following

I found a solution for the problem here.

And the following Quote from the linked Documentation also states that changing the console property from the launch.json to either "externalTerminal" or "integratedTerminal "is going to help.

When this is set to externalTerminal the target process will run in a separate terminal.

When this is set to integratedTerminal the target process will run inside VS Code's integrated terminal. Click the 'Terminal' tab in the tab group beneath the editor to interact with your application.

Location of launch.json

Upvotes: 17

Gregg Miskelly
Gregg Miskelly

Reputation: 311

Correct - 'internalConsole' is not meant for programs that want to take console input. Here is the official documentation: https://github.com/OmniSharp/omnisharp-vscode/blob/master/debugger-launchjson.md#console-terminal-window

Upvotes: 2

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