I explain my need :
When the user click on a button, I want to get all data on my grid with filters set on my grid to do an action. I can have a lot of datas (many thousand), in this case, the grid is virtualized.
In this case :
I add equal filter in ship country for get all rows where value is France.
When I click on "Get sum Freight", I want to get the sum of all rows which match. In my code, the sum take only 30 rows (1 page) from current page.
What is the best way to perform that ?