dhtmlxTreeGrid is an Ajax UI component that empowers web developers to create editable data grids with expandable rows. TreeGrid represents both hierarchical and tabular data and supports rich client-side data entry, editing and sorting. Comprehensive and flexible JavaScript API allows complete customization of the component to meet any application needs. dhtmlxTreeGrid supports paging output, column resizing, drag-and-drop, serialization to XML/SCV, filtering, searching.