Hi Sandeep,
Our grid requires it to be binded it in the webforms Init event. also if the datatable doesn''t have a primary column you should specify one.
Please have a look at the documentation that ships with our essential grid install. Here please look in to the section "EssentialGrid->ASP.net->Introducing Essentialgroupinggrid fro Asp.net-> using GridGroupingControl->Setting upDataBinding"
and make sure these steps are followed in your project.
You can also view the same in our online documentation under the same hierarchy location as mentioned above
Online Documentation
Regards,
A.Sivakumar