Persist Selection Across Pages

As of 2.10.0 this behavior is available out of the box. The new SelectAllMode parameter of the selection column can provide you with more flexibility as well. You can read more about it in the Multi-row selection article.

This example shows how you can keep the selected rows across different pages, so that the user can select multiple items from different pages without losing previous selection. With the built-in functionality of the grid, they can do that by using the individual row checkboxes, or by holding the Ctrl key when selecting/deselecting concrete rows. With the built-in functionality, using the header checkbox clears all other selection apart from the current page. This example shows how you can add rows to the selection without using the keyboard and by using the header checkbox.

Key points of the implementation:

1. Set the SelectedItems to a list that will keep all selected items across all pages.
2. Set variables for the page size and current page (the current page needs two-way binding).
3. Handle the SelectedItemsChanged event of the grid.
4. In the event handler, implement logic that adds newly selected items and removes deselected items from the persistent collection.
5. Do NOT use two-way binding of the selected items.

This project demonstrates one way to implement such logic, feel free to improve it for performance and open a pull request.