(1)看一下效果截图：

（图 1）

实现界面的代码：

<table id="w清单明细" title="清单明细"class="easyui-treegrid" style="width:1300px;height:200px" data-options=" iconCls: 'icon-ok',rownumbers: true,//显示行数animate: true,collapsible: true,fitColumns:true,//自动设置宽度lines:true, idField: 'id', //节点idtreeField: 'text',//节点文本onClickRow:XuanZhong,//单击事件"><thead><tr><th data-options="field:'InventoryDetailID' ,width:60,hidden:true" >清单明细ID</th>// field:'InventoryDetailID，要和控制器传来的值对应//清单明细ID:写给人们看的<th data-options="field:'ProjectOrderID' ,width:60,hidden:true" >工程量订单ID</th><th data-options="field:'text' ,width:100" >编号</th><th data-options="field:'Name' ,width:100" > 名称</th><th data-options="field:'Unit' ,width:80" >单位</th><th data-options="field:'Price' ,width:80" > 单价</th><th data-options="field:'Amount' ,width:60" >数量</th><th data-options="field:'AllPrice' ,width:60" >合价</th>          <th data-options="field:'Remark' ,width:80" >备注</th><th data-options="field:'Classification' ,width:120" > 类别</th><th data-options="field:'InventoryDetailFur_id' ,width:60,hidden:true" >工程量订单ID</th><th data-options="field:'PriceNumber' ,width:80" >单价编号</th></tr></thead></table>

把从控制器传来的额数据绑定到treegrid中：

 function onClickTree(){var BindingQuota = $('#Project').combobox('getValue');$.getJSON("/GongChengLiangQingDan/SelectedInventoryDetail?ProjectOrderID="+BindingQuota,function(data){//把从控制器查出的数据绑定到w清单明细'中$('#w清单明细').treegrid('loadData',data);});

控制器所涉及的方法：

 #region 查询清单明细public ActionResult SelectedInventoryDetail(string ProjectOrderID){DataTable dt = myInventoryDetail.SelectedInventoryDetail(Convert.ToInt32(ProjectOrderID));//调用逻辑层的方法StringBuilder stringbuilder = new StringBuilder();//实例化stringbuilderstringbuilder.Append(GetDataString(dt, "0"));//调用GetDataString方法（dt, "0"是两个参数）if (stringbuilder.Length > 0){//如果最后所传来的数剧>0,则就移除最后两个长度stringbuilder = stringbuilder.Remove(stringbuilder.Length - 2, 2);return Content(stringbuilder.ToString());//然后再返回给界面层}else{//return Content("no:no");string strin = "{}";//声明{}return Content(strin.ToString());//把转化的字符串用{}括起来，返回给界面层}}public string GetDataString(DataTable dt, string id){StringBuilder stringbuilder = new StringBuilder();//实例化stringbuilderDataView dv = new DataView(dt);//把dt的数据赋值给dvdv.RowFilter = "InventoryDetailFur_id=" + id;DataTable dtChild = dv.ToTable();if (dtChild.Rows.Count > 0){stringbuilder.Append("[");for (int i = 0; i < dtChild.Rows.Count; i++){string leiid = dtChild.Rows[i]["InventoryDetailID"].ToString();string chidstring = GetDataString(dt, dtChild.Rows[i]["InventoryDetailID"].ToString());if (!string.IsNullOrEmpty(chidstring)){   stringbuilder.Append("{ \"id\":\"" + dtChild.Rows[i]["InventoryDetailID"].ToString().Trim() + "\",\"text\":\"" + dtChild.Rows[i]["Number"].ToString().Trim() + "\",\"Name\":\"" + dtChild.Rows[i]["Name"].ToString().Trim() + "\",\"Unit\":\"" + dtChild.Rows[i]["Unit"].ToString().Trim() +"\",\"Price\":\"" + dtChild.Rows[i]["Price"].ToString().Trim() + "\",\"Amount\":\"" + dtChild.Rows[i]["Amount"].ToString().Trim() + "\",\"AllPrice\":\"" + dtChild.Rows[i]["AllPrice"].ToString().Trim() + "\",\"Remark\":\"" + dtChild.Rows[i]["Remark"].ToString().Trim() + "\",\"Classification\":\"" + dtChild.Rows[i]["Classification"].ToString().Trim() + "\",\"InventoryDetailFur_id\":\"" + dtChild.Rows[i]["InventoryDetailFur_id"].ToString().Trim() +"\",\"PriceNumber\":\"" + dtChild.Rows[i]["PriceNumber"].ToString().Trim() + "\",\"state\":\"closed\",\"children\":");stringbuilder.Append(chidstring);}else{stringbuilder.Append("{\"id\":\"" + dtChild.Rows[i]["InventoryDetailID"].ToString().Trim() + "\",\"text\":\"" + dtChild.Rows[i]["Number"].ToString().Trim() + "\",\"Name\":\"" + dtChild.Rows[i]["Name"].ToString().Trim() + "\",\"Unit\":\"" + dtChild.Rows[i]["Unit"].ToString().Trim() +"\",\"Price\":\"" + dtChild.Rows[i]["Price"].ToString().Trim() + "\",\"Amount\":\"" + dtChild.Rows[i]["Amount"].ToString().Trim() + "\",\"AllPrice\":\"" + dtChild.Rows[i]["AllPrice"].ToString().Trim() + "\",\"Remark\":\"" + dtChild.Rows[i]["Remark"].ToString().Trim() + "\",\"Classification\":\"" + dtChild.Rows[i]["Classification"].ToString().Trim() + "\",\"InventoryDetailFur_id\":\"" + dtChild.Rows[i]["InventoryDetailFur_id"].ToString().Trim() +"\",\"PriceNumber\":\"" + dtChild.Rows[i]["PriceNumber"].ToString().Trim() + "\" },");}}stringbuilder.Replace(',', ' ', stringbuilder.Length - 1, 1);stringbuilder.Append("]},");}return stringbuilder.ToString();}#endregion

从逻辑层调用的方法：

#region 查询清单明细public DataTable SelectedInventoryDetail(int ProjectOrderID){SqlParameter[] mySQL = {new SqlParameter("@Type",SqlDbType.Char),  new SqlParameter("@ProjectOrderID",SqlDbType.Int)};mySQL[0].Value = "SelectedInventoryDetail";//和存储过程名对应mySQL[1].Value = ProjectOrderID;DataTable dt = myDALMethod.DAL_SelectDB_Par("BillOfQuantities", mySQL);return dt;//把数据返回给控制器}#endregion

数据层的SQL查询语句：

if @Type='SelectedInventoryDetail'begin
SELECT     InventoryDetailID, ProjectOrderID,LTRIM(rtrim( Number))as Number,LTRIM (rtrim(PriceNumber)) as PriceNumber, ltrim(rtrim(Name)) as Name, ltrim(rtrim(Unit)) as Unit,LTRIM(rtrim(Price)) as Price, Ltrim(rtrim(Amount)) as Amount,LTRIM(RTRIM(AllPrice)) as AllPrice, ltrim(rtrim(Remark)) as Remark,LTRIM(rtrim(Classification)) as Classification, InventoryDetailFur_id
FROM         SYS_InventoryDetailList
where  SYS_InventoryDetailList.ProjectOrderID=@ProjectOrderIDend

（2）展开treegrid的方法：

（图 2）

//  展开下拉树function expand() {var BindingQuota = $('#Project').combobox('getValue');//这个是根据工程ID来展开的（如果你做的不需要任何条件，就不需要这个）$('#w清单明细').treegrid({url: '/GongChengLiangQingDan/SelectedInventoryDetail?ProjectOrderID='+BindingQuota });setTimeout(function () { aa(); }, 500);//调用展开方法}function aa() {$('#w清单明细').treegrid('expandAll');//展开全部的treeg}

（3）合拢treegrid：

//合拢下拉树function collapse(){$('#w清单明细').treegrid('collapseAll');}

只供学习参考，禁止商业用途，否则后果自负！