急求!!请问如何让ColumnModel根据ComboBox选项来动态即时加载更新ColumnMo...答:var cm = [{ header : "编号",dataIndex : "id",width : 65 }, { header : "名称",dataIndex : "name",width : 65 }, { header : "路径",dataIndex : "url",width : 65 }]var colModel = new Ext.grid.ColumnModel({ columns : cm });var fd = ["id", "name", "url"]...