How can i use web parts for performing drag and drops ?
2 Answers
Here is the official MSDN documentation for ASP.NET WebParts. This is the opening article containing all the links to subsequent chapters to help you further understand and implement the WebParts into an ASP.NET application.
Comments
There are also books dedicated to web parts, e.g. ASP.NET 2.0 Web Parts in Action: Building Dynamic Web Portals (APress).