Images locked by go web

GoDiagram
#1

I am using GoIconicNode that loads images of bmp format that are different sizes from a filepath. For example, I call Initialize(null, filepath, “Test”) on rendering the nodes and all images load fine.

The problem comes when I want to edit one of the images. Whether the web page still has goview loaded or has been closed, the image becomes locked and cannot be edited. I have to kill aspnet_wp.exe process in order to unlock all images that were rendered. Is there something wrong in the way I’m loading the image file or can I call something in code to release the files? Should I be using a resx file in the first place?

Thanks,
J

#2

That’s right – you should be using a resource file instead of accessing the image files on disk. All of the samples are organized that way.

#3

Walter, our scenario goes like this:

- images are submitted by the users through fileUpload, saved on the server, paths make it to a db
- entities that are associated with the images are at some point also defined by the users and eventually make to a GoView
- the user may be interested in changing and resubmitting the image - again, through, fileUpload and seeing the changes' effect on a GoView
- we control the point of image submittal but have not been able to achieve unlock/reload-like functionality with resource managers
basically, we will greately appreciate any advice on how this can be done
Thanks!
#4

The basic issue is that System.Drawing.Image.FromFile locks the file as long as the Image is in use.

I believe (but am not certain) that adding such Images to a ResourceManager would make a copy of the Image. (If that isn't the case, you could certain copy it explicitly.) The original Image could then be Disposed, thereby freeing the lock on the file.