ASPxGridView - Keep detail grid selection in DataItemTemplate checkbox on paging main grid

By default, the detail grid loses its selection if a user goes to another page of a master grid and comes back to the current page.
This example shows how to keep selection in the detail grid. The example is based on the E1318 concept (keep information on the client-side using the ASPxHiddenField) and post it to the server on demand.

See Also:
ASPxGridView - how to keep selection in detail grids when paging the master grid within a CommandColumn's SelectionCheckbox