將bitmapImage轉換為Windows存儲的字節數組

Question

我需要知道如何將位圖圖像轉換為Windows應用程序的字節數組。 這是我嘗試過的內容，但不存儲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

使用Bitmap.Save()將位圖保存到MemoryStream ，然后保存MemoryStream.ToArray() 。 也許不是最優雅的方法，但是有效。 我可以稍后再發布工作代碼。

Answer 2

我找到了：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