Why this error when doing an image conversion

Question

I am trying to convert a BitmapImage to a Byte() with the following code:

Dim ic As New ImageConverter
Dim bts() As Byte = DirectCast(ic.ConvertTo(clsImage, GetType(Byte())), Byte())

The error message I get is:

> Unable to cast object of type 'System.Windows.Media.Imaging.BitmapImage' to type 'System.Drawing.Image'.

The code does NOT attempt to convert the BitmapImage to another image so I don't how to fix this problem.

Answer 1

Hi, System.Drawing.ImageConverter converts objects from System.Drawing Namespace. Objects from namespace System.Windows.Media (PresentationCore.dll) like BitmapImage must be converted explicitly. Get byte array you can use this code:

Dim ms = TryCast(clsImage.StreamSource, MemoryStream)
Dim bts As Byte() = ms.ToArray