When using custom paging you should implement code logic which to extract merely a fixed number of records from the grid source and present them in the grid structure. You also have to define the total number of records in the grid source and set the VirtualItemCount
property of the MasterTableView
. Thus the grid "understands" that the data source contains the specified number of records and it should fetch merely part of them at a time to execute requested operation.
All the best,
the Telerik team
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