It seems that mojoportal does not have a simple image version control system. The closest to image version control is to use share file folder to upload iamges. However if a page contains an image link to http://postmojo/SharedFiles/Download.aspx?pageid=16&fileid=14&mid=45, when user upload a new image, the new image link is http://postmojo/SharedFiles/Download.aspx?pageid=16&fileid=15&mid=45. User has to manually update all page content which has links to fileid=14&mid=45 to fileid=15&mid=45. This approach is not error prone, as when there are multiple pages linking to the same image which is updated, user might forget to update some links.

Another idea I tried to get around this problem is to use url redirect, but this attempt failed.

Here are the detail steps I performed":

1) On http://postmojo/test-artisteer-xlu.aspx
I made an image link to: http://postmojo/SharedFiles/Download.aspx?pageid=16&fileid=14&mid=45
This link is obtained from sharefile image.

2) Then I tried both in Url Manager and 301 Redirect manager to redirect Url:
http://postmojo/SharedFiles/Download.aspx?pageid=16&fileid=14&mid=45

to

http://postmojo/SharedFiles/Download.aspx?pageid=16&fileid=15&mid=45

However the image on http://postmojo/testpage.aspx still displays the old version image.  Why is this approach failing? Perhaps the url redirect happens after the rendering of image?

Another idea idea is to write a new share file component in mojoportal, then somehow map the old image url with the new one automatically before image is rendered. Can someone tell me whether there is existing method to do what I want, automatic image version control without requiring user to update all page linking the the image which is being version controlled? That way, I don't have to write a new component and duplicate other people's effort.

Thank you in advance for any suggestions.

Xiaoming