Der Fehler liegt beim Abrufen Ihres Bildes. Sie müssen das Bild zuerst in ein Byte-Array konvertieren, bevor Sie es im Bildfeld anzeigen..
Public Function ResizeImageWithAspect(ByVal picImage As Image, ByVal newWidth As Integer) As Bitmap
Dim original As Image = picImage
If Not original Is Nothing Then
//Find the aspect ratio between the height and width.
Dim aspect As Single = CSng(original.Height) / CSng(original.Width)
//Calculate the new height using the aspect ratio
// and the desired new width.
Dim newHeight As Integer = CInt((newWidth * aspect))
//Create a bitmap of the correct size.
Dim temp As New Bitmap(newWidth, newHeight, original.PixelFormat)
//Get a Graphics object from the bitmap.
Dim newImage As Graphics = Graphics.FromImage(temp)
//Draw the image with the new width/height
newImage.DrawImage(original, 0, 0, newWidth, newHeight)
//Dispose of our objects.
Return temp
original.Dispose()
temp.Dispose()
newImage.Dispose()
Else
Return Nothing
End If
End Function
Public Function ByteToImage(ByVal blob() As Byte) As Bitmap
Dim mStream As New System.IO.MemoryStream
Dim pData() As Byte = DirectCast(blob, Byte())
mStream.Write(pData, 0, Convert.ToInt32(pData.Length))
Dim bm As Bitmap = New Bitmap(mStream, False)
mStream.Dispose()
Return bm
End Function
Public Function FileImageToByte(ByVal filePath As String) As Byte()
Dim fs As FileStream = New FileStream(filePath, FileMode.Open, FileAccess.Read)
Dim br As BinaryReader = New BinaryReader(fs)
Dim bm() As Byte = br.ReadBytes(fs.Length)
br.Close()
fs.Close()
Dim photo() As Byte = bm
Return photo
End Function
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