AJAX allows the component to refresh without refreshing the entire page. You can add AJAX support to the FpSpread component by setting the EnableAjaxCall property. This affects several features including expanding and collapsing child sheets in a hierarchical display, column sorting, inserting rows, and paging.

If the ClientAutoCalculation property is true, then after a cell value is changed, an AJAX call is made to the FpSpread component. Then the component calculates the formulas and sends the values to the client side. The component then updates the values at the client side.