How to get "Active signal resolution"?

Question

Answer 1

Found the answer. DISPLAYCONFIG_VIDEO_SIGNAL_INFO::activeSize

ns-wingdi-displayconfig_video_signal_info

Answer 2

Please try the following code:

        private async Task<string> GetActiveSignalResolution()  
        {  
            var all = await DeviceInformation.FindAllAsync(DisplayMonitor.GetDeviceSelector());  
            if (all != null)  
            {  
                foreach (var info in all)  
                {  
                    if (info.Kind == DeviceInformationKind.DeviceInterface)  
                    {  
                        var display = await DisplayMonitor.FromInterfaceIdAsync(info.Id);  
                        if (display != null)  
                        {  
                            var size = display.NativeResolutionInRawPixels;  
                            return size.Width.ToString() + " × " + size.Height.ToString();  
                        }  
                    }  
                }  
            }  
            throw new NotSupportedException();  
        }  

The code comes from this thread and it works for me after testing.

Because this code uses the UWP API, you need to install a nuget package: Microsoft.Windows.SDK.Contracts

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