Question

C#如何获取系统显示的缩放比例

Windows Vista以上的操作系统可以设置系统内容显示的缩放比例，就像下图那样。
请问如何把这个值获取出来？谢谢

Answer 1

DPI is how scaling setting is implemented. Their relationship is:

96 DPI = 100% scaling

120 DPI = 125% scaling

144 DPI = 150% scaling

192 DPI = 200% scaling

Read the DPI setting like so:

// C# code to get dpi setting:
float dpiX, dpiY;
Graphics graphics = this.CreateGraphics();
dpiX = graphics.DpiX;
dpiY = graphics.DpiY

You'll have to make sure that your program is set to DPI aware in manifest, otherwise it may return 96 in all settings.