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 Image         


        

Answer 1

You can use a MemoryStream. By saving the image into a MemoryStream, you can get the byte array of data from the image:

Dim ms = new MemoryStream()
imgSegnature.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg) ' Use appropriate format here
Dim bytes = ms.ToArray()

Answer 2

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.