MacOS 10.13.6 Console.SetWindowSize() exception

[Petermarcu]

I'm opening this on behalf of a user from VS Feedback. https://developercommunity.visualstudio.com/content/problem/318400/macos-10136-consolesetwindowsize-exception.html

dotnet core 2.1 document say support macos

Unhandled Exception: System.PlatformNotSupportedException: Operation is not supported on this platform.
   at System.ConsolePal.SetWindowSize(Int32 width, Int32 height)
   at System.Console.SetWindowSize(Int32 width, Int32 height)
   at ColorConsoleDemo.Program.Main(String[] args) in /Users/zhm/OneDrive/CodeStudy/dotnetcore/ColorConsoleDemo/Program.cs:line 26

code:

using System;
using System.Collections.Generic;

namespace ColorConsoleDemo {
    class Program {
        static void Main (string[] args) {
            List<ConsoleColor> colors = new List<ConsoleColor> ();
            // 遍历枚举的写法，高级用法，把各种颜色保存到List里
            foreach (ConsoleColor color in Enum.GetValues (typeof (ConsoleColor))) {
                colors.Add (color);
            }


            int i = 0;


            // 清楚屏幕，屏幕会被刷为空的背景色
            Console.Clear ();
            // 指定前景色
            Console.ForegroundColor = colors[i % colors.Count];
            // 指定背景色
            Console.BackgroundColor = colors[(i + 1) % colors.Count];
            Console.Write ("Hello");
            Console.ForegroundColor = colors[(i + 2) % colors.Count];
            int origWidth = Console.WindowWidth;
            int origHeight = Console.WindowHeight;
            Console.SetWindowSize (origWidth / 2, origHeight / 2);
            Console.Write (" world!", Console.WindowWidth, Console.WindowHeight);
            Console.SetCursorPosition (80, 15);
            Console.Write ("test");
            Console.SetCursorPosition (81, 16);
            Console.Write ("test");
            Console.SetCursorPosition (82, 17);
            Console.Write ("test");
            Console.SetCursorPosition (83, 18);
            Console.Write ("test");
            Console.SetCursorPosition (84, 19);
            Console.Write ("test");
            System.Threading.Thread.Sleep (1000);
            i++;
        }
    }
}

[stephentoub]

.NET Core 2.1 is supported on macOS, but there are a limited number of APIs that don't work because of platform limitations, and Console.SetWindowSize is one of them, hence the exception.

@terrajobst or @mairaw can probably comment on the best way tooling or docs could be updated to reflect this, but at present there's no bug here in the implementation; it's by design that it throws PlatformNotSupportedException.

[wfurt]

note that I get same result on Linux. there is ioctl(TIOCSWINSZ) but that is generally informational.
It is up to the application to handle it. Also note, that there may not be window at all - at least not local managed by OS. (ssh or serial port access)

[devklick]

I understand that this will be a pretty low priority, as there really arent that many use cases for setting the console size, but I'd love to see this functionality implemented on Linux, if possible.

[wfurt]

It is not a matter of priority but more so technical feasibility. Unix "Console" is text-based and does not have window. When starting .NET console app, the app does not own or control the window - it is owned by the terminal app. There is more technical discussion here: #31658

cc: @tmds

[junzhou98]

this problem has resolve?

[junzhou98]

it can't resolve?

[junzhou98]

help

[junzhou98]

urgent

[wfurt]

Are you on 2.1 @junzhou98? 2.1 support will expire in ~ month. Just catch the exception if you cannot avoid the call.
Alternatively you can p/invoke the icon but that may or may not work. And if it is not, there is no real way IMHO how .NET can make it.

[CAMOBAP]

I assume there is the same exception for Linux/Docker

P.S. related breadbyte/ConsoleInteractive#9

[adamsitnik]

The issue got fixed by #75824, which is included in .NET 8.

Some OSes still don't support it, but there is nothing we can do about it:
https://github.com/dotnet/runtime/blob/0e6e35f3e378e299736fbe07d83ebc339658bbf7/src/libraries/System.Console/src/System/
Console.cs#L440C1-L450