prevent duplicate site / page / layouts / templates / webparts, possible

We have a sharepoint environment with many sites (and sometime开发者_开发知识库s many site collections). Each site (or site collection) has the same default page with some custom webparts that use sitecolumn values (for example a projectcode or clientcode) to show information from external systems. (for each project we have to create a separate site (or site collection) because of other reasons)

What is the best approach to minimize duplication? The dynamic parts of the page are stored in site columns. When we add a new webpart, ideally the default page every site/page should show the new webpart without spreading the update to the individual pages

Thanks

One approach you may want to take is to use the web part as a wrapper for a user control. The user control does the heavy lifting on the site. Once the web part is included on your pages, the user control should be able to tell which site it is being executed on and pull the necessary dynamic data from your site columns.

When you need to make updates, you update the user control and then redeploy the solution package to the farm. Each site will pick up the change as soon as the solution is deployed.

Here is a little information about this approach:

http://msdn.microsoft.com/en-us/library/ff649867.aspx.

The above article relates to WSS 3.0, but that should give you a starting point.

An approach you may want to look at for SharePoint 2010 is a visual web part. More info can be found here: http://msdn.microsoft.com/en-us/library/ff597539.aspx.