在这个问题中,我们要求解的是如何使用WPF(Windows Presentation Foundation)来改变屏幕的亮度。WPF是一个用于开发桌面应用程序的框架,它提供了丰富的UI功能和硬件加速渲染。要使用WPF来改变屏幕亮度,您需要使用P/Invoke(平台调用)来调用Windows API中的函数。
以下是一个简单的示例,展示了如何使用WPF来改变屏幕亮度:
System.Windows.Forms
和System.Runtime.InteropServices
的引用。GetDevicePowerState
和SetDevicePowerState
函数。这些函数允许您获取和设置显示器的电源状态。
using System;
using System.Runtime.InteropServices;
using System.Windows;
using System.Windows.Forms;
public partial class MainWindow : Window
{
[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
static extern bool GetDevicePowerState(int deviceNumber, ref DEVICE_POWER_STATE powerState);
[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
static extern bool SetDevicePowerState(int deviceNumber, DEVICE_POWER_STATE powerState);
private const int SM_TABLETPC = 86;
private const int SM_MEDIACENTER = 87;
private const int SM_STARTER = 88;
private const int SM_SERVERR2 = 89;
private const int SM_MOBILE = 90;
private const int SPI_GETSCREENSAVERRUNNING = 114;
private const int SPI_SETSCREENSAVERRUNNING = 115;
private const int SPI_GETSCREENSAVEACTIVE = 16;
private const int SPI_SETSCREENSAVEACTIVE = 17;
private const int SPI_GETSCREENSAVETIMEOUT = 14;
private const int SPI_SETSCREENSAVETIMEOUT = 15;
private const int SPI_GETLOWPOWERACTIVE = 83;
private const int SPI_SETLOWPOWERACTIVE = 84;
private const int SPI_GETPOWEROFFACTIVE = 85;
private const int SPI_SETPOWEROFFACTIVE = 86;
private const int SPI_GETSCREENSAVESECURE = 77;
private const int SPI_SETSCREENSAVESECURE = 78;
private const int SPI_GETACTIVEWINDOWTRACKING = 47;
private const int SPI_SETACTIVEWINDOWTRACKING = 48;
private const int SPI_GETMENUANIMATION = 42;
private const int SPI_SETMENUANIMATION = 43;
private const int SPI_GETCOMBOBOXANIMATION = 9;
private const int SPI_SETCOMBOBOXANIMATION = 10;
private const int SPI_GETLISTBOXSMOOTHSCROLLING = 52;
private const int SPI_SETLISTBOXSMOOTHSCROLLING = 53;
private const int SPI_GETGRADIENTCAPTIONS = 69;
private const int SPI_SETGRADIENTCAPTIONS = 70;
private const int SPI_GETKEYBOARDCUES = 44;
private const int SPI_SETKEYBOARDCUES = 45;
private const int SPI_GETMENUUNDERLINES = 74;
private const int SPI_SETMENUUNDERLINES = 75;
private const int SPI_GETACTIVEWNDTRKZORDER = 54;
private const int SPI_SETACTIVEWNDTRKZORDER = 55;
private const int SPI_GETHOTTRACKING = 76;
private const int SPI_SETHOTTRACKING = 77;
private const int SPI_GETFOREGROUNDLOCKTIMEOUT = 81;
private const int SPI_SETFOREGROUNDLOCKTIMEOUT = 82;
private const int SPI_GETACTIVEWNDTRKTIMEOUT = 8;
private const int SPI_SETACTIVEWNDTRKTIMEOUT = 9;
private const int SPI_GETFOREGROUNDFLASHCOUNT = 20;
private const int SPI_SETFOREGROUNDFLASHCOUNT = 21;
private const int SPI_GETCARETWIDTH = 41;
private const int SPI_SETCARETWIDTH = 42;
private const int SPI_GETMOUSECLICKLOCK = 82;
private const int SPI_SETMOUSECLICKLOCK = 83;
private const int SPI_GETFONTSMOOTHINGTYPE = 74;
private const int SPI_SETFONTSMOOTHINGTYPE = 75;
private const int SPI_GETFONTSMOOTHINGCONTRAST = 72;
private const int SPI_SETFONTSMOOTHINGCONTRAST = 73;
private const int SPI_GETFOCUSBORDERWIDTH = 84;
private const int SPI_SETFOCUSBORDERWIDTH = 85;
private const int SPI_GETFOCUSBORDERHEIGHT = 86;
private const int SPI_SETFOCUSBORDERHEIGHT = 87;
private const int SPI_GETFONTSMOOTHINGORIENTATION = 76;
private const int SPI_SETFONTSMOOTHINGORIENTATION = 77;
public enum DEVICE_POWER_STATE
{
PowerDeviceUnspecified = 0,
PowerDeviceD0,
PowerDeviceD1,
PowerDeviceD2,
PowerDeviceD3,
PowerDeviceMaximum
}
public enum
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