Hello test_components123,

There is no "true" infinite scrolling available in WebDataGrid, however the Virtual Scrolling behavior can be used to fetch more rows from the server dynamically in order to increase performance with large data sources:

http://help.infragistics.com/doc/ASPNET/2013.2/CLR4.0/?page=WebDataGrid_Virtual_Scrolling.html

Please do not hesitate to contact me if you have any questions.