TreePanel 操作之一：加载树

     加载树有两种方法，一是通过js，二是直接在后台绑定。

     第一种方法：

<ext:TreePanel ID="ClientJobTree" runat="server" Icon="Note" Border="false"   AutoScroll="true">
   <Listeners>
     <Before Fn="LoadeNode" />
   </Listeners>
</ext:TreePanel>

脚本代码：

        function LoadeNode(node) {
            Coolite.AjaxMethods.NodesBind(node.id, {
                success: function(result) {
                    var data = eval("(" + result + ")");
                    node.loadNodes(data);
                },

                failure: function(errorMsg) {
                    Ext.Msg.alert('Failure', errorMsg);
                }
            });
        }

后台代码：

加载一级和二级菜单

        /// <summary>
        /// 绑定树
        /// </summary>
        public void TreeBind()
        {
            string projectID = Request.QueryString["ProjectID"].ToString();
            string Name = TextFieldName.Text.ToString();
            string clientGroup = ExtComboBoxParameterGroup.SelectedItem.Text.ToString();
            string services = ExtComboBoxParameterServices.SelectedItem.Text.ToString();
            Coolite.Ext.Web.TreeNode root = new Coolite.Ext.Web.TreeNode();
            //通过ProjectID找到Name
            PROJ_ProjectBase projectBase = this.logic.GetProjectBaseByProjectID(projectID);
            root.Text = projectBase.project_name;
            ClientJobTree.Root.Add(root);
            List<PROJ_ClientJob> rootList = this.logic.GetClientJob(projectID, Name, services,clientGroup);
            foreach (PROJ_ClientJob item in rootList)
            {
                string clientID = item.clientJob_id;
                string clientName = item.job_name;
                AsyncTreeNode rootNode = new AsyncTreeNode();
                rootNode.NodeID = clientID;
                rootNode.Text = clientName;
                rootNode.Icon = Icon.Folder;
                rootNode.Expanded = true;
                root.Nodes.Add(rootNode);
            }
        }

绑定三级菜单

        /// <summary>
        /// 树节点的绑定
        /// </summary>
        /// <param name="nodes">节点集合</param>
        /// <param name="parentNodeID">父节点号</param>
        public void NodeBind(Coolite.Ext.Web.TreeNodeCollection nodes, string parentNodeID)
        {
            string projectID = Request.QueryString["ProjectID"].ToString();
            List<PROJ_WBS> wbsList = this.logic.GetProjectWbsByClientJobID(parentNodeID, projectID);
            foreach (PROJ_WBS item in wbsList)
            {
                Coolite.Ext.Web.AsyncTreeNode treeNode = new Coolite.Ext.Web.AsyncTreeNode();
                treeNode.NodeID = item.wbs_id;
                treeNode.Text = item.wbs_name;
                treeNode.Icon = Icon.Folder;
                treeNode.Expanded = false;
                nodes.Add(treeNode);
            }
        }

        /// <summary>
        /// 绑定树节点
        /// </summary>
        /// <param name="nodeID"></param>
        /// <returns></returns>
        [AjaxMethod]
        public string NodesBind(string nodeID)
        {
            Coolite.Ext.Web.TreeNodeCollection nodes = new Coolite.Ext.Web.TreeNodeCollection();
            this.NodeBind(nodes, nodeID);
            return nodes.ToJson();
        }

第二种方法：（直接在后台绑定，不需要<beforeLoad fn="" />

/// <summary>
        /// 绑定树
        /// </summary>
        public Coolite.Ext.Web.TreeNodeCollection TreeBind()
        {
            Coolite.Ext.Web.TreeNodeCollection nodes = new Coolite.Ext.Web.TreeNodeCollection();
            string projectID = Request.QueryString["ProjectID"].ToString();
            string name = TextFieldName.Text.ToString();
            string clientGroup = ComboBoxClientGroup.SelectedItem.Text.ToString();
            string services = ComboBoxClientService.SelectedItem.Text.ToString();
            Coolite.Ext.Web.TreeNode root = new Coolite.Ext.Web.TreeNode();
            //通过ProjectID找到Name
            PROJ_ProjectBase projectBase = this.logic.GetProjectBaseByProjectID(projectID);
            root.Text = projectBase.project_name;
            ClientJobTree.Root.Add(root);
            List<PROJ_ClientJob> rootList = this.logic.GetClientJob(projectID, name, services, clientGroup);
            foreach (PROJ_ClientJob item in rootList)
            {
                string clientID = item.clientJob_id;
                string clientName = item.job_name;
                Coolite.Ext.Web.TreeNode supernode = new Coolite.Ext.Web.TreeNode();
                supernode.NodeID = clientID;
                supernode.Text = clientName;
                supernode.Icon = Icon.Folder;
                supernode.Expanded = true;
                root.Nodes.Add(supernode);
                this.NodeBind(clientID, supernode);
            }

            return ClientJobTree.Root;
        }

        /// <summary>
        /// 树节点的绑定
        /// </summary>
        /// <param name="parentNodeID">父节点号</param>
        /// <param name="parentcode">父节点</param>
        public void NodeBind(string parentNodeID, Coolite.Ext.Web.TreeNode parentcode)
        {
            string projectID = Request.QueryString["ProjectID"].ToString();
            List<PROJ_WBS> wbsList = this.logic.GetProjectWbsByClientJobID(parentNodeID, projectID);
            foreach (PROJ_WBS item in wbsList)
            {
                Coolite.Ext.Web.TreeNode node = new Coolite.Ext.Web.TreeNode();
                string wbsID = item.wbs_id;
                node.NodeID = item.wbs_id;
                node.Text = item.wbs_name;
                node.Icon = Icon.Folder;
                //node.Expanded = false;
                parentcode.Nodes.Add(node);
                this.NodeBind(wbsID, node);
            }
        }