C# 获取当前屏幕DPI

原文: C# 获取当前屏幕DPI

1.通过Graphics类获取

1Graphics currentGraphics = Graphics.FromHwnd(new WindowInteropHelper(mainWindow).Handle);
2double dpixRatio = currentGraphics.DpiX/96;

比如当前屏幕设置DPI设置1.5倍，可以通过如上通过后台获取。

2.通过Win32-ManagementClass

1using (ManagementClass mc = new ManagementClass("Win32_DesktopMonitor"))
2{
3    using (ManagementObjectCollection moc = mc.GetInstances())
4    {
5
6        int PixelsPerXLogicalInch = 0; // dpi for x
7        int PixelsPerYLogicalInch = 0; // dpi for y
8
9        foreach (ManagementObject each in moc)
10        {
11            PixelsPerXLogicalInch = int.Parse((each.Properties["PixelsPerXLogicalInch"].Value.ToString()));
12            PixelsPerYLogicalInch = int.Parse((each.Properties["PixelsPerYLogicalInch"].Value.ToString()));
13        }
14    }
15}

值得一提的是,有主副屏屏幕的情况下，是获取不了副屏的DPI的！

注：屏幕的物理分辨率/真实分辨率/高宽缩放比例，可参考C# API 获取系统DPI缩放倍数跟分辨率大小