SharePoint 2007 does not enable ASP.NET AJAX by default. Although the process to enable ASP.NET AJAX on a SharePoint 2007 web application is rather straightforward, it can be time consuming and error prone due to the amount of web.config entries
ASP.NET AJAX Page Methods Performance Analysis
As we have previously seen, ASP.NET AJAX Page Methods are a great way to return the minimum amount of data required in an AJAX request. But the question remains, just how much bandwidth can you save by using Page Methods
ASP.NET AJAX Page Methods
ASP.NET contains some controls which makes adding AJAX features to your application rather easy. For example, Microsoft has provided us with the UpdatePanel. The UpdatePanel control allows you to partially render individual portions of your pages without initiating a full