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。