将bitmapImage转换为Windows存储的字节数组

Question

I need to know how to convert a bitmap-image to a byte array for windows store application. Here is what I have tried but it does not store the bitmapImage

    Dim file As StorageFile = Await Windows.Storage.StorageFile.GetFileFromApplicationUriAsync()
    Dim stream As IRandomAccessStream = Await file.OpenAsync(Windows.Storage.FileAccessMode.Read)
    Dim decoder As BitmapDecoder = Await BitmapDecoder.CreateAsync(stream)
    Dim pixelData As PixelDataProvider = Await decoder.GetPixelDataAsync()
    Return pixelData.DetachPixelData()

Answer 1

Save the bitmap to MemoryStream with Bitmap.Save() and then save the MemoryStream.ToArray() . Maybe not the most elegant approach, but works. I can post a working code a bit later.

Answer 2

I found it :D

Async Function bitmapTObyte(ByVal bitmapimage1 As StorageFile) As Task(Of Byte())
    Dim fileBytes As Byte() = Nothing
    Using stream As IRandomAccessStreamWithContentType = Await bitmapimage1.OpenReadAsync()
        fileBytes = New Byte(stream.Size - 1) {}
        Using reader As New DataReader(stream)
            Await reader.LoadAsync(CUInt(stream.Size))
            reader.ReadBytes(fileBytes)
            Return fileBytes
        End Using
    End Using