Hello Hrushikesh,
You can set ClientSettings.EnablePostBackOnRowClick to true along with ClientSettings.Selecting.AllowRowSelect to achieve this.
Regards,
Vlad
the Telerik team
http://www.telerik.com/forums/selectedindexchanged-event-of-radgrid
RadGrid SelectedIndexChanged 事件没反应的解决方法
原文：http://www.cnblogs.com/songjiefa/p/4654768.html