RadRotator LoadOnDemand from XML File

[Phill Hodgkinson]

Hi There,

Is is possible to use the RadRotator in LoadOnDemand mode when the data comes from an XML file? I have an xml file with approx 200 images listed. I want users to be able to scroll one image at a time but naturally I don't want to have to load 200 images when the rotator loads, I want to be able to load images one at a time.

Any pointers to pull this off, preferably without having to write a web service, would be greatly appreciated.

Regards,
Phill

[Niko]

Hi Phill,

Usually the easiest way would be to use a web service for loading dynamically the rotator items, as this functionality is already built-in. For a reference here is the URL to the demo for LoadOnDemand - http://demos.telerik.com/aspnet-ajax/rotator/examples/loadondemand/defaultcs.aspx.
If you decide to do a custom implementation you will need to recreate the build-in functionality. Here is a draft of the basic things that you will need to implement for this scenario:

1. Create a handler that gets the needed image from the XML data file.
2. The rotator needs to be set of type FromCode
3. The advancing of the rotator should be a custom implementation and should be synchronized with the data loaded from the server.
4. In the hander of the Ajax request the following client side API functions should be used: addRotatorItem and after that repaint of the rotator.

Basically implementing a custom solution appears to be more complex that creating a simple web service.

Hope this helps.

All the best,
Nikodim
the Telerik team