Hi, In a grid, I want to display a serial number along with my data. I am u

May be you can add pagingInfo startIndex to the enumerate function instead of 1.
Example : enumerate(length(datasubset.data))+local!pagingInfo.startIndex

Thanks @janakik!

The other option is that you could have enumerated on the totalcount of the datasubset, such as:

enumerate(datasubset.totalCount)+1.

Your other solution works as well though.

Thanks guys for this!
Can I ask you if we could disable the sort functionality from the grid header?

The best option I have found is instead of saving the entire paging info, only saving startIndex and batchSize, while not saving sort info. The code for the save into in the grid is the following:

saveInto: {
a!save(
ri!pagingInfo,
a!pagingInfo(
startIndex: save!value.startIndex,
batchSize: save!value.batchSize
)
)
}

If the user does click on the top of a column to sort, it will keep the items in the original order but take them to the top of the grid, so this works best with grids that are not often paged through.

Disabling sort can be done indirectly by resetting the sortInfo every time user interacts with the grid or by capturing only the startIndex. In this way you have to only update the startIndex of the pagingInfo variable that you are using and then reset the sortInfo as a second step in grid saveInto block. Something like the following...
saveInto:{
a!save(local!pagingInfo.startIndex, save!value.startIndex)
}

You can use this code in grid field value , 

value: wherecontains ( fv!identifier , tointeger ( fv!currentPage.identifiers ) ) + fv!currentPage.startIndex - 1,