Question

I managed to convert an Image to a varbinary and store it in my database. I have been trying to convert the varbinary to an Image but I’m running in some trouble here.

First I get the Binary from my database in my service.

    public Binary getAfbeelding(int id)
    {

        var query = (from p in dc.Afbeeldings
                     where p.id == id
                     select p.source).Single();

        Binary source = query;
        return source;
    }

Then I try to convert the varbinary to an image, using code found on StackOverflow:

    public static string convertToImage(Binary source)
    {
        byte[] b = source.ToArray();
        MemoryStream ms = new MemoryStream(b);
        Image img = Image.FromStream(ms);
        return img.Source.ToString();
    }

I am running into trouble before the call to new MemoryStream :

‘OndernemersAward.EditAfbeeldingServiceReference.Binary’ does not contain a definition for ‘ToArray’ and no extension method ‘ToArray’ accepting a first argument of type
‘OndernemersAward.EditAfbeeldingServiceReference.Binary’ could be found (are you missing a using directive or an assembly reference?)

For some weird reason, I CANNOT use the ‘normal’ Binary, it will ALWAYS tell me to use OndernemersAward.EditAfbeeldingServiceReference.Binary which is my ServiceReference, as you can see.

How can this be solved?

Answer 1

1) Add reference into your project to System.Data.Linq.dll

2) And then try this:

public static Image ConvertToImage(System.Data.Linq.Binary iBinary)
    {
        var arrayBinary = iBinary.ToArray();
        Image rImage = null;

        using (MemoryStream ms = new MemoryStream(arrayBinary))
        {
            rImage = Image.FromStream(ms);
        }
        return rImage;
    }