Windows Store App MediaCapture Simulator Crash

1
votes

I am using the following function in my app to capture a photo using MediaCapture class and copy it to clipboard:

        async private void UseCamera()
        {
        var _ImageFormat = ImageEncodingProperties.CreatePng();
        var _fileStream = new InMemoryRandomAccessStream();

        try
        {
            await _mediaCapture.InitializeAsync();
        }

        catch (Exception e)
        {
            new Windows.UI.Popups.MessageDialog(e.Message).ShowAsync();
        }

        try
        {
            await _mediaCapture.CapturePhotoToStreamAsync(_ImageFormat, _fileStream);
        }

        catch (Exception e)
        {
            new Windows.UI.Popups.MessageDialog(e.Message).ShowAsync();
        }

        var _streamRef = Windows.Storage.Streams.RandomAccessStreamReference.CreateFromStream(_fileStream);
        _dataPackage.SetBitmap(_streamRef);


        Clipboard.SetContent(_dataPackage);
        Clipboard.Flush();

    }

The app is running fine on my local machine. But when I try to run it on simulator, i am given this error:

"An exception of type 'System.UnauthorizedAccessException' occurred in SensorGridCamera.exe but was not handled in user code

Additional information: Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED))"

Can anyone help me with it?

2
c#windows-8windows-store-apps
Have you tried running your application as Admin? – Middas
try to remove MessageDialog in code temporary and see the result because some time it throws UnauthorizedAccessException. Don't use async void in method, use async Task – Farhan Ghumra
Middas- how to run as admin in simulator? – Shobhan Taparia
Xyroid - i reduced code to just initialization of mediacapture object and await _mediaCapture.InitializeAsync(); looks like this line has some issues.. will try the task method – Shobhan Taparia

2 Answers

1
votes

It sounds like it's a permissions issue, running as Admin should fix it. Add an Application Manifest to your project. Then change <requestedExecutionLevel level="asInvoker" uiAccess="false" /> to <requestedExecutionLevel level="requireAdministrator" uiAccess="false" /> This will force your application to request to be run as Admin when it's run.

1
votes

OK, so I found this thing, which worked for me:

The trick was to pass a MediaCaptureInitializationSettings object in the await _mediaCapture.InitializeAsync(); method as an argument and before you do that, set the object's PhotoCaptureSource property to VideoPreview and voila!

            MediaCaptureInitializationSettings _cameraSettings1 = new MediaCaptureInitializationSettings();
            _cameraSettings1.PhotoCaptureSource = PhotoCaptureSource.VideoPreview;
            await _mediaCapture.InitializeAsync(_cameraSettings1);

Hope it helps. Cheers :)