I want to implement the filtering using combobox.

I want to implement the filtering using combobox. So how can I implement. So, can you please help me. I want to implement that filtering combobox in header portion. So, Please help me.

Please check if you have attached dhtmlxgrid_filter.js.
More information abut in-grid filtering you can find here dhtmlx.com/dhxdocs/doku.php?id=d … :filtering
Also there are a lot of working samples at your dhtmlxGrid and dhtmlxConnector packages.