jqgrid下treeGrid的插件配置

function gridList() {
var $gridList = $("#gridList");
$gridList.jqGrid({
treeGrid: true, 
datatype: "json",
auto true,
//rownumbers: true,
shrinkToFit: false,
gridview: true,    
treeGridModel: "adjacency",
ExpandColumn: "org_name",
url: "/index.php/organise/organise_list",
height: $(window).height() - 96,
colModel: [
{ label: "主键", name: "org_Id", hidden: true, key: true },
{ label: '名称', name: 'org_name',  200, align: 'left' },
{ label: '编号', name: 'org_num',  150, align: 'left' },
{ label: '分类', name: 'org_category',  150, align: 'left' },
{ label: '备注', name: 'description',  150, align: 'left' },

{ label: '操作', name: 'org_Id',  150, align: 'center',
formatter: function (org_Id,options, rowObject) {
var showStatus=rowObject.is_delete==0?"启用":"禁用";
return '<a href="/index.php?/organise/organise_edit/'+org_Id+'">编辑</a> | <a href="/index.php?/organise/organise_del/'+org_Id+'">'+showStatus+'</a></td>';

}
}    
]
});
}

{
    "rows": [
        {
            "level": 1,
            "isLeaf": false,
            "expanded": true,
            "org_Id": "2",
            "parent": "1",
            "org_name": "北京伟景行股份有限公司",
            "org_num": "无",
            "org_category": "公司",
            "description": "无"
        },
        {
            "level": 2,
            "isLeaf": true,
            "expanded": false,
            "org_Id": "3",
            "parent": "2",
            "org_name": "行政部",
            "org_num": "无",
            "org_category": "部门",
            "description": "无"
        },
        {
            "level": 2,
            "isLeaf": true,
            "expanded": false,
            "org_Id": "4",
            "parent": "2",
            "org_name": "财务部",
            "org_num": "无",
            "org_category": "部门",
            "description": "无"
        },
        {
            "level": 2,
            "isLeaf": true,
            "expanded": false,
            "org_Id": "5",
            "parent": "2",
            "org_name": "信息部",
            "org_num": "无",
            "org_category": "部门",
            "description": "无"
        },
        {
            "level": 1,
            "isLeaf": false,
            "expanded": true,
            "org_Id": "6",
            "parent": "1",
            "org_name": "伟景行科技有限公司",
            "org_num": "无",
            "org_category": "公司",
            "description": "无"
        },
        {
            "level": 2,
            "isLeaf": true,
            "expanded": false,
            "org_Id": "7",
            "parent": "6",
            "org_name": "新业务部",
            "org_num": "无",
            "org_category": "部门",
            "description": "无"
        },
        {
            "level": 2,
            "isLeaf": false,
            "expanded": true,
            "org_Id": "8",
            "parent": "6",
            "org_name": "数据中心",
            "org_num": "无",
            "org_category": "部门",
            "description": "无"
        },
        {
            "level": 3,
            "isLeaf": true,
            "expanded": false,
            "org_Id": "9",
            "parent": "8",
            "org_name": "项目一部",
            "org_num": "无",
            "org_category": "部门",
            "description": "无"
        },
        {
            "level": 3,
            "isLeaf": false,
            "expanded": true,
            "org_Id": "10",
            "parent": "8",
            "org_name": "项目二部",
            "org_num": "无",
            "org_category": "部门",
            "description": "无"
        },
        {
            "level": 4,
            "isLeaf": true,
            "expanded": false,
            "org_Id": "11",
            "parent": "10",
            "org_name": "智慧城市",
            "org_num": "无",
            "org_category": "小组",
            "description": "无"
        },
        {
            "level": 4,
            "isLeaf": true,
            "expanded": false,
            "org_Id": "12",
            "parent": "10",
            "org_name": "智慧旅游",
            "org_num": "无",
            "org_category": "小组",
            "description": "无"
        }
    ]
}

"level": 2, "isLeaf": false, "expanded": true,"parent": "10",  很重要，应该是缺一不可