c# 多种方法调整屏幕亮度

github: https://github.com/chnmaxgor/ajustscreenbrightness

 

方法一: 使用网上常说的 gdi32.dll 下的 setdevicegammaramp (修改系统gamma)

dllimport("gdi32.dll")]
public static extern bool getdevicegammaramp(intptr hdc, ref ramp lpramp);

[dllimport("gdi32.dll")]
public static extern bool setdevicegammaramp(intptr hdc, ref ramp lpramp);

方法二: 使用msdn上的 dxva2.dll setmonitorbrightness

 1 [dllimport("dxva2.dll")]
 2 public static extern bool getnumberofphysicalmonitorsfromhmonitor(intptr hmonitor, ref uint pdwnumberofphysicalmonitors);
 3 
 4 [dllimport("dxva2.dll")]
 5 public static extern bool getphysicalmonitorsfromhmonitor(intptr hmonitor,
 6                 uint dwphysicalmonitorarraysize, [out] physicalmonitor[] pphysicalmonitorarray);
 7 
 8 [dllimport("dxva2.dll")]
 9 public static extern bool destroyphysicalmonitors(uint dwphysicalmonitorarraysize,
10                 [out] physicalmonitor[] pphysicalmonitorarray);
11 
12 [dllimport("dxva2.dll")]
13 public static extern bool getmonitortechnologytype(intptr hmonitor,
14                 ref mcdisplaytechnologytype pdtydisplaytechnologytype);
15 
16 [dllimport("dxva2.dll")]
17 public static extern bool getmonitorcapabilities(intptr hmonitor, ref uint pdwmonitorcapabilities,
18                 ref uint pdwsupportedcolortemperatures);
19 
20 [dllimport("dxva2.dll")]
21 public static extern bool setmonitorbrightness(intptr hmonitor, short brightness);
22 
23 [dllimport("dxva2.dll")]
24 public static extern bool setmonitorcontrast(intptr hmonitor, short contrast);
25 
26 [dllimport("dxva2.dll")]
27 public static extern bool getmonitorbrightness(intptr hmonitor, ref short pdwminimumbrightness,
28                 ref short pdwcurrentbrightness, ref short pdwmaximumbrightness);
29 
30 [dllimport("dxva2.dll")]
31 public static extern bool getmonitorcontrast(intptr hmonitor, ref short pwdminimumcontrast,
32                 ref short pwdcurrentcontrast, ref short pwdmaximumcontrast);

 

方法三: 使用 c:\windows\system32\driverstore\filerepository\igdlh64.inf_amd64_neutral_3daeca3838e011e0\igfxdhlib.dll (这是驱动的文件,不同机器有自己对应的驱动文件)

datahandlerclass _cls = new datahandlerclass();
_cui_color_devices _screenmodel = default(_cui_color_devices);

public ajustscreenbyigfxdhlib()
{
    cui_supported_config cui_supported_config = default(cui_supported_config);
    uint num = _cls.get_supportedconfig(ref cui_supported_config);
    var id = cui_supported_config.deviceconfig[0].dispdev[0];
    uint[] array = new uint[3];
    var a = _cls.get_getdevicelist(id, array);
    _screenmodel.uldevices = array[0];
    _screenmodel.device = new _cui_color_info[3];
    _screenmodel.device[0].brightness.color = _color_type.numcolors;
    _screenmodel.device[0].contrast.color = _color_type.numcolors;
    _screenmodel.device[0].gamma.color = _color_type.numcolors;
    _screenmodel.command = _cui_color_command.get_color;
    _cls.get_color(_screenmodel.uldevices, ref _screenmodel);
}

　　

注意事项 该方法使用时请注意好参数的范围,比如说把对比度设置太低时屏幕会完全黑掉 什么都看不到,然后你就不能直接把对比度调回来了.