Get native resolution of screen

Question

Is there a way to get the native resolution of a screen in c#?

The reason that I ask is that I have some curves and it is very important that they look the same no matter what resolution. When the screen isn't in native resolution they look somewhat different than before and I want to show a warning that that is the case.

Answer 1

Generally, Max Resolution is the Native Resolution for LCD Displays. However, that's not always the case. If we can leverage there, getting Max Resolutions should suffice.

Max Resolution can be obtained using:

    [DllImport("user32.dll")]
    private static extern int EnumDisplaySettings(string deviceName, int modeNum, ref DeviceMode devMode);

    /// <summary>
    /// Gets the max resolution + refresh rate supported by specific display
    /// </summary>
    /// <param name="deviceName">Device name(System.Windows.Forms.Screen.DeviceName)</param>
    /// <param name="dispWidth">Width of the display</param>
    /// <param name="dispHeight">Height of the display</param>
    /// <param name="refreshRate">Refresh rate of the display</param>
    /// <returns></returns>
    public static void GetMaxResolutionWithRefreshRate(string deviceName, out int dispWidth, out int dispHeight, out int refreshRate)
    {
        dispWidth = dispHeight = refreshRate = 0;
        DeviceMode deviceMode = new DeviceMode();
        for (int i = 0; Win32.EnumDisplaySettings(deviceName, i, ref deviceMode) != 0; i++)
        {
            if (deviceMode.dmPelsWidth > dispWidth || (deviceMode.dmPelsWidth == dispWidth && deviceMode.dmPelsHeight >= dispHeight && deviceMode.dmDisplayFrequency >= refreshRate))
            {
                dispWidth = deviceMode.dmPelsWidth;
                dispHeight = deviceMode.dmPelsHeight;
                refreshRate = deviceMode.dmDisplayFrequency;
            }
        }
    }

public static void GetMaxResolutionWithRefreshRate(out int dispWidth, out int dispHeight, out int refreshRate)
    {
        GetMaxResolutionWithRefreshRate(null, out dispWidth, out dispHeight, out refreshRate);
    }