c# 获取电脑分辨率及 DPI 设置

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Runtime.InteropServices;/// <summary>
/// 这个可以
/// </summary>
class Program
{static void Main(){//设置DPI感知try{SetProcessDpiAwareness(PROCESS_PER_MONITOR_DPI_AWARE);}catch{// 旧版Windows回退方案try{SetProcessDPIAware();}catch { }}try{// 获取所有显示器信息var monitors = GetAllMonitors();if (monitors.Count == 0){Console.WriteLine("未检测到显示器");return;}// 创建或覆盖本地txt文件string filePath = @"C:\DisplayInfo.txt";using (StreamWriter writer = new StreamWriter(filePath)){writer.WriteLine("显示器信息报告");writer.WriteLine($"获取时间: {DateTime.Now:yyyy-MM-dd HH:mm:ss}");writer.WriteLine($"检测到 {monitors.Count} 台显示器");foreach (var monitor in monitors){writer.WriteLine($"显示器名称: {monitor.DeviceName} {(monitor.IsPrimary ? "(主显示器)" : "")}");writer.WriteLine($"分辨率: {monitor.Width} × {monitor.Height}");writer.WriteLine($"DPI缩放百分比: {monitor.DpiScalePercent:F0}%");}}Console.WriteLine($"信息已写入文件：{filePath}");Console.WriteLine("按任意键打开文件...");Console.ReadKey();Process.Start("notepad.exe", filePath);}catch (Exception ex){Console.WriteLine($"发生错误：{ex.Message}");}}//DPI感知声明[DllImport("shcore.dll")]private static extern int SetProcessDpiAwareness(int value);private const int PROCESS_PER_MONITOR_DPI_AWARE = 2;//显示器API声明[StructLayout(LayoutKind.Sequential)]public struct RECT{public int Left;public int Top;public int Right;public int Bottom;}[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]public struct MONITORINFOEX{public int Size;public RECT Monitor;public RECT WorkArea;public uint Flags;[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]public string DeviceName;}[DllImport("user32.dll")]private static extern IntPtr MonitorFromWindow(IntPtr hwnd, uint dwFlags);[DllImport("user32.dll", CharSet = CharSet.Auto)]private static extern bool EnumDisplayMonitors(IntPtr hdc, IntPtr lprcClip,MonitorEnumDelegate lpfnEnum, IntPtr dwData);[DllImport("user32.dll", CharSet = CharSet.Auto)]private static extern bool GetMonitorInfo(IntPtr hMonitor, ref MONITORINFOEX lpmi);[DllImport("shcore.dll")]private static extern int GetDpiForMonitor(IntPtr hmonitor, int dpiType, out uint dpiX, out uint dpiY);[DllImport("user32.dll")]private static extern IntPtr GetDesktopWindow();[DllImport("user32.dll")]private static extern bool SetProcessDPIAware();private delegate bool MonitorEnumDelegate(IntPtr hMonitor, IntPtr hdcMonitor, ref RECT lprcMonitor, IntPtr dwData);// 常量定义private const int MDT_EFFECTIVE_DPI = 0;private const int MONITOR_DEFAULTTOPRIMARY = 1;// 显示器信息类public class DisplayInfo{public string DeviceName { get; set; }public int Width { get; set; }public int Height { get; set; }public double DpiScalePercent { get; set; }public bool IsPrimary { get; set; }}// 获取所有显示器信息的方法private static List<DisplayInfo> GetAllMonitors(){var displayInfos = new List<DisplayInfo>();MonitorEnumDelegate monitorDelegate = (IntPtr hMonitor, IntPtr hdcMonitor, ref RECT lprcMonitor, IntPtr dwData) =>{MONITORINFOEX mi = new MONITORINFOEX();mi.Size = Marshal.SizeOf(mi);if (GetMonitorInfo(hMonitor, ref mi)){uint dpiX = 96, dpiY = 96;bool isPrimary = (mi.Flags & 0x1) != 0;// 使用专用API获取DPIif (GetDpiForMonitor(hMonitor, MDT_EFFECTIVE_DPI, out dpiX, out dpiY) != 0){// API失败时使用主显示器DPIIntPtr primaryMonitor = MonitorFromWindow(GetDesktopWindow(), MONITOR_DEFAULTTOPRIMARY);GetDpiForMonitor(primaryMonitor, MDT_EFFECTIVE_DPI, out dpiX, out dpiY);}// 计算DPI百分比 (基于96 DPI为100%)double dpiScalePercent = Math.Round((dpiX / 96.0) * 100, 0);displayInfos.Add(new DisplayInfo{DeviceName = mi.DeviceName.Trim(),Width = mi.Monitor.Right - mi.Monitor.Left,Height = mi.Monitor.Bottom - mi.Monitor.Top,DpiScalePercent = dpiScalePercent,IsPrimary = isPrimary});}return true;};EnumDisplayMonitors(IntPtr.Zero, IntPtr.Zero, monitorDelegate, IntPtr.Zero);return displayInfos;}
}

新建控制台应用程序执行即可
如下，一台显示器：

多台显示器信息