Best For SharePoint

Refer this link for sharepoint books,examples etc.
http://knarayanarao.wordpress.com/

FileUpload Control in Update Panel using ASP.NET AJAX

Generally We face Problem with Fileupload control & tree view when place inside Update control.

This cen be solved in many ways,

1- can use HTML Fileupload control in place of asp.net fileupload control

2-refer

http://www.c-sharpcorner.com/UploadFile/prathore/FileUpload04292009022804AM/FileUpload.aspx

3- U can add trigger in update panel ,if any of the event is not fired.

Sending Multiple Rows For Updation in Sql

Update OR Insertion of multiple rows  into database from Application ,can be done easily .
This problem can be   handeled :
refer
http://www.sqlservercentral.com/articles/Comma+seperated/67417/