byte[] to image convertion in windows phone 7 application

I am doing an application for windows phone 7. the application is access a image from database(Sql server 2008). the data is stored in data type 'image'.I want to Display the image. i use the following code

     public object Convert(object value, Type targetType, object parameter,           System.Globalization.CultureInfo culture)
    {
        byte[] dat开发者_如何学Ca;
        BitmapImage empImage = new BitmapImage(); 
        Stream mm;
        data = (byte[])value;
        mm = new MemoryStream(data);
        mm.Position = 0;
        BinaryReader BR = new BinaryReader(mm);
        byte[] image=BR.ReadBytes(data.Length);
        mm = new MemoryStream(image);
        //empImage.SetSource(mm);
        return empImage;
    }

But there is a 'Unspecified' error at commented line (empImage.SetSource(mm);).

Please help Me......

BitmapImage.SetSource accepts a Stream (you can leave out the CreateOptions if you don't need to access the bytes immediately afterwards):

public object Convert(object value, Type targetType, object parameter,
       System.Globalization.CultureInfo culture)
{
    byte[] data = (byte[])value;

    using (MemoryStream stream = new MemoryStream(data))
    {
        BitmapImage image = new BitmapImage
        {
            CreateOptions = BitmapCreateOptions.None
        };

        image.SetSource(stream);

        return image;
    }
}

Also, I don't think an IValueConverter is the right place for this sort of code.

And finally, the image database type has been deprecated in favour of varbinary(MAX)