Get DataKey values in GridView RowCommand

http://stackoverflow.com/questions/2818203/get-datakey-values-in-gridview-rowcommand

More than one command argument in datagrid

http://forums.asp.net/t/732910.aspx

ASP.NET Validation in Depth

http://msdn.microsoft.com/en-us/library/aa479045.aspx

Validation Examples

http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.validationsummary.aspx

SharePoint: Document Library

http://blogs.techrepublic.com.com/msoffice/?p=217

ASP.NET AJAX UpdatePanel Triggers

Understanding ASP .NET Ajax Updatepanel Triggers

How IIS Process ASP.Net Request

Beginners Guide : How IIS Process ASP .NET Request

Use Microsoft Chart Controls for .NET Framework in a SharePoint web site

Using Chart Control in Sharepoint

Essential SharePoint Programming Tasks

http://msdn.microsoft.com/en-us/library/ee534973.aspx

How to: Return Items from a List

http://msdn.microsoft.com/en-us/library/ms456030.aspx

How to: Read the Value of a Field in a List Item

http://msdn.microsoft.com/en-us/library/ff521580.aspx

Best Practices: Common Coding Issues When Using the SharePoint Object Model

http://msdn.microsoft.com/en-us/library/bb687949(v=office.12).aspx

Getting References to Sites, Web Applications, and Other Key Objects

http://msdn.microsoft.com/en-us/library/ms468609.aspx