Hi @svisveswaraiya_285988
Please have a look at support article CS314439 on how to enable the SelectedRows from service functionality. For the paging use case the table that has all data bound to it will need to use the auto select first row functionality and will most likely need to be an invisible table.
Please note: In 8.5.X the Advanced Grid is the standard grid widget and Auto Select first row is achieved with the following two properties:
- RowSelection: Single or Multiple
- DefaultSelectedRows: 1
I was able to use the selected rows event following the article. An alternative if you are using the Grid Advanced widget to visualize your data, there is a SelectedRows property. Binding the output of this property to a different table did update with the selection. You should be able to use this to feed your popup mashup.