bugmenot1234 wrote: I'd expect the XmlDataSource.Save() method to write my TreeView back to the bound data source. I would ask you to check that if you are getting any exception while performing Save. I was going through the MSDN [^]documentation of Save method, I found few points which you should consider as it can be used only for following scenarios - 1. The XML data is loaded from an XML file indicated by the DataFile property, not from inline XML data specified in the Data property. 2. No XSLT transformation is specified in the Transform or TransformFile properties. Also, keep in mind Save does not handle concurrent scenario. Regards, Arindam Sinha MyBlog - http://arindamsinha.wordpress.com/ Please give your feedback on this message using rating.

bugmenot1234 wrote: will I need to develop actually on the SharePoint server itself Yes, this is in the documentation. You can copy the SharePoint assemblies to your local machine so they can be referenced but you will not be able to debug your code. bugmenot1234 wrote: it needs to be made available within an IFRAME in another (large) web application. What about security? Will this be an anonymous SharePoint site or will it use Windows or Forms authentication? Including SharePoint in an IFRAME won't work. I think you need to spend a little time understanding what SharePoint is and isn't before proceeding. only two letters away from being an asset