WPF改变亮度
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：
- 首先，您需要在项目中添加对
System.Windows.Forms和System.Runtime.InteropServices的引用。 - 然后，您需要使用P/Invoke来调用Windows API中的
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相关·内容
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动力节点-JDK动态代理（AOP）使用及实现原理分析
动力节点Java培训动态代理是使用jdk的反射机制，创建对象的能力， 创建的是代理类的对象。 而不用你创建类文件。不用写java文件。
动态：在程序执行时，调用jdk提供的方法才能创建代理类的对象。jdk动态代理，必须有接口，目标类必须实现接口， 没有接口时，需要使用cglib动态代理。
动态代理可以在不改变原来目标方法功能的前提下， 可以在代理中增强自己的功能代码。
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