Get and Set Screen Resolution

Question

How can I collect and change screen resolution using Visual C

User · Answer

For retrieving the screen resolution  you re going to want to use the System Windows Forms Screen class  The Screen AllScreens property can be used to access a collection of all of the displays on the system  or you can use the Screen PrimaryScreen property to access the primary display   The Screen class has a property called Bounds  which you can use to determine the resolution of the current instance of the class  For example  to determine the resolution of the current screen   Rectangle resolution   Screen PrimaryScreen Bounds    For changing the resolution  things get a little more complicated  This article  or this one  provides a detailed implementation and explanation  Hope this helps

User · Answer

I have spent a lot of time trying to figure this out  for devices with scaling factor is very difficult to get the actual size of the screen due to the scaling factor sometimes 125  or 150  when the calls are made to the C  objects the returning value is not the right now  so you need to make a windows API call to get the scaling factor and apply the multiplier  the only working way that I have found for non WPF apps is here  https   stackoverflow com a 21450169

User · Answer

This code will work perfectly in WPF  You can use it in either page load or in button click         string screenWidth  System Windows SystemParameters PrimaryScreenWidth ToString           string screenHeight   System Windows SystemParameters PrimaryScreenHeight ToString           txtResolution Text   Resolution     screenWidth     X     screenHeight

User · Answer

In C  this is how to get the resolution Screen   button click or form load   string screenWidth   Screen PrimaryScreen Bounds Width ToString    string screenHeight   Screen PrimaryScreen Bounds Height ToString    Label1 Text     Resolution      screenWidth    x    screenHeight

User · Answer

If you want to collect screen resolution you can run the following code within a WPF window  the window is what the this would refer to    System Windows Media Matrix m   PresentationSource FromVisual this  CompositionTarget TransformToDevice  Double dpiX   m M11   96  Double dpiY   m M22   96

User · Answer

in Winforms  there is a Screen class you can use to get data about screen dimensions and color depth for all displays connected to the computer  Here s the docs page  http   msdn microsoft com en-us library system windows forms screen aspx  CHANGING the screen resolution is trickier  There is a Resolution third party class that wraps the native code you d otherwise hook into  Use its CResolution nested class to set the screen resolution to a new height and width  but understand that doing this will only work for height width combinations the display actually supports  800x600  1024x768  etc  not 817x435

User · Answer

Answer from different solutions to get Display Resolution  Get the scaling factor  Get Screen PrimaryScreen Bounds Width and Screen PrimaryScreen Bounds Height multiple by scaling factor result  region Display Resolution    DllImport  quot gdi32 dll quot   CharSet   CharSet Auto  SetLastError   true  ExactSpelling   true    public static extern int GetDeviceCaps IntPtr hDC  int nIndex     public enum DeviceCap         VERTRES   10       DESKTOPVERTRES   117       public static double GetWindowsScreenScalingFactor bool percentage   true            Create Graphics object from the current windows handle      Graphics GraphicsObject   Graphics FromHwnd IntPtr Zero          Get Handle to the device context associated with this Graphics object      IntPtr DeviceContextHandle   GraphicsObject GetHdc           Call GetDeviceCaps with the Handle to retrieve the Screen Height      int LogicalScreenHeight   GetDeviceCaps DeviceContextHandle   int DeviceCap VERTRES        int PhysicalScreenHeight   GetDeviceCaps DeviceContextHandle   int DeviceCap DESKTOPVERTRES          Divide the Screen Heights to get the scaling factor and round it to two decimals      double ScreenScalingFactor   Math Round PhysicalScreenHeight    double LogicalScreenHeight  2          If requested as percentage - convert it      if  percentage                  ScreenScalingFactor    100 0                Release the Handle and Dispose of the GraphicsObject object      GraphicsObject ReleaseHdc DeviceContextHandle        GraphicsObject Dispose           Return the Scaling Factor      return ScreenScalingFactor       public static Size GetDisplayResolution           var sf   GetWindowsScreenScalingFactor false        var screenWidth   Screen PrimaryScreen Bounds Width   sf       var screenHeight   Screen PrimaryScreen Bounds Height   sf       return new Size  int screenWidth   int screenHeight         endregion    to check display resolution var size   GetDisplayResolution    Console WriteLine  quot Display Resoluton   quot    size Width    quot x quot    size Height

[c#] Get and Set Screen Resolution

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