How to Convert System.Drawing.Image to Byte Array?

Question

Hi I'm trying to convert image to byte array to pass it into sql as byte(). Im trying to use Image Converter but it keeps failing

Dim converter As New ImageConverter
nRow.Signature = converter.ConvertTo(imgSignature, TypeOf(Byte())

the error I keep getting is byte is a type not expression

Answer 1

The VB.NET TypeOf operator doesn't do what you think it does. Somewhat confusing perhaps due to the C# typeof operator. The VB.NET equivalent is the GetType() function. This works fine:

Dim converter As New ImageConverter
nRow.Signature = converter.ConvertTo(imgSignature, GetType(Byte()))

The type converter uses a MemoryStream to make the conversion, using the PNG image format.