Is it possible to get/set the console font size?

user_449534 0
Viewed 52010

I have seen posts on changing console true type font and console colors (rgb) but nothing on setting or getting the console font size.

The reason I want to change the font size is because a grid is printed to the console, and the grid has many columns, so, it fits better with a smaller font. I'm wondering if it's possible to change it at runtime rather than allowing the default or configured fonts to take priority / override inheritance.

interop console .net c#
4 Answers

In this thread I found a much more elegant solution that now works perfectly fine.

ConsoleHelper.cs:

using System;
using System.Runtime.InteropServices;

public static class ConsoleHelper
{
    private const int FixedWidthTrueType = 54;
    private const int StandardOutputHandle = -11;

    [DllImport("kernel32.dll", SetLastError = true)]
    internal static extern IntPtr GetStdHandle(int nStdHandle);

    [return: MarshalAs(UnmanagedType.Bool)]
    [DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
    internal static extern bool SetCurrentConsoleFontEx(IntPtr hConsoleOutput, bool MaximumWindow, ref FontInfo ConsoleCurrentFontEx);

    [return: MarshalAs(UnmanagedType.Bool)]
    [DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
    internal static extern bool GetCurrentConsoleFontEx(IntPtr hConsoleOutput, bool MaximumWindow, ref FontInfo ConsoleCurrentFontEx);


    private static readonly IntPtr ConsoleOutputHandle = GetStdHandle(StandardOutputHandle);

    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
    public struct FontInfo
    {
        internal int cbSize;
        internal int FontIndex;
        internal short FontWidth;
        public short FontSize;
        public int FontFamily;
        public int FontWeight;
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
        //[MarshalAs(UnmanagedType.ByValArray, ArraySubType = UnmanagedType.wc, SizeConst = 32)]
        public string FontName;
    }

    public static FontInfo[] SetCurrentFont(string font, short fontSize = 0)
    {
        Console.WriteLine("Set Current Font: " + font);

        FontInfo before = new FontInfo
        {
            cbSize = Marshal.SizeOf<FontInfo>()
        };

        if (GetCurrentConsoleFontEx(ConsoleOutputHandle, false, ref before))
        {

            FontInfo set = new FontInfo
            {
                cbSize = Marshal.SizeOf<FontInfo>(),
                FontIndex = 0,
                FontFamily = FixedWidthTrueType,
                FontName = font,
                FontWeight = 400,
                FontSize = fontSize > 0 ? fontSize : before.FontSize
            };

            // Get some settings from current font.
            if (!SetCurrentConsoleFontEx(ConsoleOutputHandle, false, ref set))
            {
                var ex = Marshal.GetLastWin32Error();
                Console.WriteLine("Set error " + ex);
                throw new System.ComponentModel.Win32Exception(ex);
            }

            FontInfo after = new FontInfo
            {
                cbSize = Marshal.SizeOf<FontInfo>()
            };
            GetCurrentConsoleFontEx(ConsoleOutputHandle, false, ref after);

            return new[] { before, set, after };
        }
        else
        {
            var er = Marshal.GetLastWin32Error();
            Console.WriteLine("Get error " + er);
            throw new System.ComponentModel.Win32Exception(er);
        }
    }
}

This way you can just do:

ConsoleHelper.SetCurrentFont("Consolas", 10);
user_138798890

After running the application (Ctrl + F5), right-click the title of the Console (it should say something like C:Windows\system32\cmd.exe) and select properties. Choose the "Font" tab, and you'll see the option to adjust the size.

user_158903300
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