BLOB to Bitmap in axapta - blob

Question

I have declared a variable as
Bitmap image;
Container storeImg;
I am storing the image as
storeImg+= image;
the image is stored as BLOB type in container
Later On when I try to retrieve the image in a Bitmap variable e.g.
Bitmap image2;
image2 = conpeek(storeImg,1);
I get an "operand mismatch error"
My question is I have declared the image as bitmap and stored in a container then why the error when I am trying to retrieve the same in a bitmap datatype only?
Thanks in advance.

Answer 1

The Bitmap extended data type is really a container.
Adding containers gives concatenation which may be (part of) your problem:
static void BitmapTest(Args _args)
{
Bitmap image1 = [1,2,3];
Bitmap image2 = [7,8,9];
Container storeImg;
;
storeImg += image1;
storeImg += image2;
print conlen(storeImg);
pause;
}
This prints 6, not 2 as you may assume.
Also blob and container is not the same thing:
static void BitmapTest(Args _args)
{
BinData b = new BinData();
Bitmap image1 = b.getData();
Bitmap image2 = b.getData();
Container storeImg;
;
storeImg += image1;
storeImg += image2;
image2 = conpeek(storeImg,1);
pause;
}
This will fail because storeImg contains two blob values.
Change the assignments to:
storeImg += [image1];
storeImg += [image2];
This will work, because now storeImg contains two container values (containing a blob).
Also see Load and Save file from and to container field