c#

c# enumdisplaymonitors怎样处理用户输入

小樊
85
2024-12-07 19:36:52
栏目: 编程语言

在C#中,EnumDisplayMonitors函数用于枚举所有可用的显示监视器。要处理用户输入,您需要首先获取用户想要查询的显示监视器的索引,然后使用该索引调用EnumDisplayMonitors函数。以下是一个简单的示例,说明如何处理用户输入并获取显示监视器的相关信息:

using System;
using System.Drawing;
using System.Runtime.InteropServices;

namespace EnumDisplayMonitorsExample
{
    class Program
    {
        [DllImport("user32.dll")]
        private static extern bool EnumDisplayMonitors(IntPtr hdc, IntPtr hwnd, EnumMonitorDelegate lpfnEnum, IntPtr lParam);

        [UnmanagedFunctionPointer(CallingConvention.StdCall)]
        private delegate bool EnumMonitorDelegate(IntPtr hMonitor, IntPtr hdcMonitor, ref RECT lprcMonitor, IntPtr dwData);

        [StructLayout(LayoutKind.Sequential)]
        private struct RECT
        {
            public int Left;
            public int Top;
            public int Right;
            public int Bottom;
        }

        static void Main(string[] args)
        {
            Console.WriteLine("请输入要查询的显示监视器的索引:");
            int monitorIndex = int.Parse(Console.ReadLine());

            if (EnumDisplayMonitors(IntPtr.Zero, IntPtr.Zero, MonitorCallback, IntPtr.Zero))
            {
                Console.WriteLine($"显示监视器 {monitorIndex} 的信息:");
                Console.WriteLine($"设备名: {monitorInfo.DeviceName}");
                Console.WriteLine($"工作区: {monitorInfo.WorkArea}");
                Console.WriteLine($"分辨率: {monitorInfo.Bounds}");
            }
            else
            {
                Console.WriteLine("无法获取显示监视器信息。");
            }
        }

        private static void MonitorCallback(IntPtr hMonitor, IntPtr hdcMonitor, ref RECT lprcMonitor, IntPtr dwData)
        {
            monitorInfo.DeviceName = MonitorFromWindow(hMonitor, MONITOR_DEFAULTTOPRIMARY).DeviceName;
            monitorInfo.WorkArea = MonitorFromWindow(hMonitor, MONITOR_DEFAULTTOPRIMARY).WorkArea;
            monitorInfo.Bounds = MonitorFromWindow(hMonitor, MONITOR_DEFAULTTOPRIMARY).Bounds;

            if (monitorIndex == 0)
            {
                monitorInfo = new MONITORINFOEX();
                monitorInfo.cbSize = (uint)Marshal.SizeOf(monitorInfo);
                MonitorFromWindow(hMonitor, MONITOR_DEFAULTTOPRIMARY, out monitorInfo);
            }
        }

        private static IntPtr MonitorFromWindow(IntPtr hwnd, uint dwFlags)
        {
            return NativeMethods.MonitorFromWindow(hwnd, dwFlags);
        }
    }
}

在这个示例中,我们首先获取用户输入的显示监视器索引,然后调用EnumDisplayMonitors函数。在回调函数MonitorCallback中,我们使用MonitorFromWindow函数获取显示监视器的相关信息,并将其存储在monitorInfo结构体中。最后,我们将这些信息输出到控制台。

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