vb.net CDN图像仅在生产中

Question

Whats the right way to change the url for all the images on my site to use a cdn url or not based on a web.config value.

I have this web.config value

<add key="UseCDN" value="1"/>

now my page has a whole bunch of <\\asp:image imageurl="RELATIVEPATH" tags.

I want them to point to my machine when "useCDN" = 0 and to cdn.com\\RELATIVEPATH when "useCDN" = 1

whats the best way to do this?

Answer 1

For you to implement a cross cutting solution, you have to extend the image control class and override the Render method to use the use the CDN value (if in production).

Or just create a normal ASCX user control and use it. Can't search now but a simple search will get you plenty of tutorials.

UPDATE:

A tutorial to help you do it