$("#NextNodeIds").combobox({ editable: false, url: "/WorkFlow/NextNodeForComBox?flowId=" + "@Model.FlowNode.FLOW_ID", valueField: 'NodeId', textField: 'NodeName', multiple: true, onLoadSuccess: function() { var nodeIds = "@Model.NodeCfg.NextNodeIds"; $("#NextNodeIds").combobox("setValues", nodeIds.split(',')); } }); <input type="text" class="text" id="NextNodeIds" name="NextNodeIds" panelHeight="130" /> [HttpPost] public ActionResult NextNodeForComBox(string flowId) { var rows = WorkFlowService.SelectNodesByFlow(flowId).Select(o => new { NodeId = o.NODE_ID, NodeName = o.NODE_NAME }); return Json(rows); }