Please add the 'onEndEdit' event handler for your datagrid.
$('#dtg_test').edatagrid({
	onEndEdit:function(index,row){
		var editors = $(this).edatagrid('getEditors',index);
		for(var i=0; i<editors.length; i++){
			var ed = editors[i];
			var t = $(ed.target);
			if (t.hasClass('textbox-f')){
				t.textbox('textbox').trigger('blur')
				row[ed.field] = t.textbox('getValue');
			}
		}
	}
});