about asp.net controls

learnig asp.net ...MSDN is best

you can start from here which list all controls including user controls and webparts controls
http://msdn.microsoft.com/en-us/library/bb386451.aspx
Later, you can just check for tutorials for complex controls like gridviews from search..

MSDN will list you all the properties, methods and events related to each and every asp.net controls. If you are a beginner, MSDN is the primary option.
 
There were lots of C-SharpCorner articles that provides you the sample project explaining about the controls in .net. You can search it in articles session of C-Sharpcorner

Hi Kritika I prefer taking a asp.net book and read all the basics before starting a project.

check here  ASP.NET Web Server Controls