Access to the path, when try to ReadAllTheBytes

Question

I am getting a file, via a picker and I am displaying that image in a Image control in xaml.

The image displays perfectly, but when I tried to convert the path to bytes, I get the error

Tried to give picture library permition

  var picker = new FileOpenPicker();
            picker.ViewMode = PickerViewMode.Thumbnail;
            picker.SuggestedStartLocation = PickerLocationId.PicturesLibrary;
            picker.FileTypeFilter.Add(".jpg");
            picker.FileTypeFilter.Add(".png");
            picker.FileTypeFilter.Add(".jpeg");

            var file = await picker.PickSingleFileAsync();

            if (file != null) {

                var stream =  await file.OpenReadAsync();

                var bitmap = new BitmapImage();

                bitmap.SetSource(stream);

                var bytes = File.ReadAllBytes(file.Path); // Error

                selectedimage.Source = bitmap;

{"Access to the path 'some path' is denied."}

Thank you @PavelAnikhouski, but I already tried it and it docent work. Besides, what I want to do is convert it into bytes. The image will display, but the app crash on File.ReadAllBytes(file.Path) — , Aug 13 '19 at 11:15
This is already answered here [thread](https://stackoverflow.com/questions/36081740/uwp-async-read-file-into-byte) `File.ReadAllBytes` isn't for UWP — Pavel Anikhouski, Aug 13 '19 at 12:44

score 0 · Accepted Answer · answered Aug 13 '19 at 13:05

0

Access to the path, when try to ReadAllTheBytes

UWP run in sandbox, we can't access the file with the path directly,Even though we already add broadFileSystemAccess capability, we could not use ReadAllTheBytes under System.IO namespace. And Pavel Anikhouski's comment is correct, we could use MemoryStream to convert the file to bytes.

    byte[] result;
    using (Stream stream = await imageFile.OpenStreamForReadAsync())
    {
        using (var memoryStream = new MemoryStream())
        {

            stream.CopyTo(memoryStream);
            result = memoryStream.ToArray();
        }
    }

answered Aug 13 '19 at 13:05

Nico Zhu

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Where are my manners, thank you very much, I appreciate it – Aug 14 '19 at 13:21
It's my pleasure. – Nico Zhu Aug 14 '19 at 15:15
By the way @Nico how can I get a job an entry level Windows Developer – Aug 15 '19 at 16:05

Access to the path, when try to ReadAllTheBytes

1 Answers1