如何在c＃console应用程序中获取系统dpi设置

问题描述

如何在c＃console应用程序中获取系统dpi设置。无论是dpi是90还是120或其他一些自定义设置。

How to get the system dpi settings in c# console application. Whether the dpi is 90 or 120 or some other custom setting.

推荐答案

using (Graphics graphics = Graphics.FromHwnd(IntPtr.Zero))
{
    float dpiX = graphics.DpiX;
    float dpiY = graphics.DpiY;
}

注意：您需要对System.Drawing程序集的引用。

using System;
using System.Runtime.InteropServices;

namespace DPI
{
    class Program
    {
        [DllImport("gdi32.dll")]
        static extern int GetDeviceCaps(IntPtr hdc, int nIndex);

        [DllImport("user32.dll")]
        static extern IntPtr GetDC(IntPtr hWnd);

        /// <summary>
        /// Logical pixels inch in X
        /// </summary>
        const int LOGPIXELSX = 88;
        /// <summary>
        /// Logical pixels inch in Y
        /// </summary>
        const int LOGPIXELSY = 90;

        static void Main(string[] args)
        {
            IntPtr hdc = GetDC(IntPtr.Zero);

            Console.WriteLine(GetDeviceCaps(hdc, LOGPIXELSX));
            // or
            Console.WriteLine(GetDeviceCaps(hdc, LOGPIXELSY));
            Console.ReadKey();
        }
    }
}

无需额外参考。但是如果导入gdi32和user32 dll更好吗？我不知道 - 马尔科夫和艾伦N'的解决方案看起来更优雅......

No additional references needed. But if it''s better to import gdi32 and user32 dll? I dont know - markovl''s and Alan N''s solutions look more elegant...

using (Graphics g = Graphics.FromHwnd(Process.GetCurrentProcess().MainWindowHandle)) {
  Console.WriteLine("X {0:F0}dpi, Y {1:F0}dpi", g.DpiX, g.DpiY);
}

using (RegistryKey key = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\WindowsNT\CurrentVersion\FontDPI")) {
  Console.WriteLine(key.GetValue("LogPixels"));
}

Alan。

Alan.

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