c# 获取屏幕DPI

方法一：用ManagementClass来获取。需要引入System.Management.dll;

 using (ManagementClass mc = new ManagementClass("Win32_DesktopMonitor"))

            {

                using (ManagementObjectCollection moc = mc.GetInstances())

                {



                    int PixelsPerXLogicalInch = 0; // dpi for x

                    int PixelsPerYLogicalInch = 0; // dpi for y



                    foreach (ManagementObject each in moc)

                    {

                        PixelsPerXLogicalInch = int.Parse((each.Properties["PixelsPerXLogicalInch"].Value.ToString()));

                        PixelsPerYLogicalInch = int.Parse((each.Properties["PixelsPerYLogicalInch"].Value.ToString()));

                    }



                    Console.WriteLine("PixelsPerXLogicalInch:" + PixelsPerXLogicalInch.ToString());

                    Console.WriteLine("PixelsPerYLogicalInch:" + PixelsPerYLogicalInch.ToString());

                    Console.Read();

                }

            }

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方法二：用Graphics来获取。需要引入 System.Drawing.dll ;

using (Graphics graphics = Graphics.FromHwnd(IntPtr.Zero))

            {

                float dpiX = graphics.DpiX;

                float dpiY = graphics.DpiY;

            }

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