what is diiference between following filter

Dear Sir

what is diiference between following filter:
1)select_filter, combo_filter
2)select_filter, connector_select_filter

what rule we should follow when apply it to the development?

Thanks in adance

If you are using dhtmlxConnector on the server side, you should use “connector_select_filter”

“combo_filter” may be used only if all rows are loaded at once. This type of filter is available in PRO version only as it creates dhtmlxCombo select box in the grid header.