TreeView控件的使用小结

TreeView控件是APS.NET中的常用控件，现对其用法做一简单小结，具体内容如下：

1.public TreeNode FindNode(string valuePath) { ... }   其中valuePath指节点的值路径 示例代码如下：

 

        /// <summary>
        /// 填充左侧的模块树
        /// </summary>
        /// <param name="tv_modules">树形控件</param>
        /// <param name="selectedMID">选中的模块组号</param>
        public void BuildLeftTree(TreeView tv_modules, int selectedMID)
        {
            //添加根节点
            TreeNode rootTN = new TreeNode();
            rootTN.Text = SysConfig.LEFTTREE_ROOT_TEXT;
            rootTN.Value = SysConfig.LEFTTREE_ROOT_VALUE;
            rootTN.ImageUrl = SysConfig.LEFTTREE_ROOT_IMAGEURL;
            rootTN.NavigateUrl = SysConfig.LEFTTREE_ROOT_NAVIGATEURL;
            rootTN.Target = SysConfig.LEFTTREE_ROOT_TARGET;
            rootTN.PopulateOnDemand = false;
            rootTN.SelectAction = TreeNodeSelectAction.None;
            rootTN.Expand();
            tv_modules.Nodes.Add(rootTN);

            PlatformAccessor pa = new PlatformAccessor();

            DataSet ds = pa.getCodeRow(6, 1);
            DataTable dt = ds.Tables[0];
            DataRow dr = dt.Rows[0];

            string content = dr["CONTENTS"].ToString();

            XmlNodeList nodes = _xmldoc.SelectNodes("/Root/MyModules/Item");

            if (content == "1")
            {
                //添加“我的模块”节点
                TreeNode mymodulesTN = new TreeNode();
                mymodulesTN.Text = SysConfig.LEFTTREE_MYMODULES_TEXT;
                mymodulesTN.Value = SysConfig.LEFTTREE_MYMODULES_VALUE;
                mymodulesTN.ImageUrl = SysConfig.LEFTTREE_MYMODULES_IMAGEURL;
                mymodulesTN.NavigateUrl = SysConfig.LEFTTREE_MYMODULES_NAVIGATEURL;
                mymodulesTN.Target = SysConfig.LEFTTREE_MYMODULES_TARGET;
                mymodulesTN.PopulateOnDemand = false;
                mymodulesTN.SelectAction = TreeNodeSelectAction.None;
                mymodulesTN.Expand();
                rootTN.ChildNodes.Add(mymodulesTN);

                //添加“我的模块”
                foreach (XmlNode xmlnode in nodes)
                {
                    _addOneTreeNode(mymodulesTN, xmlnode, false);
                }

            }

            PlatformAccessor pfa = new PlatformAccessor();

            DataRow row = pfa.getModuleData(selectedMID);

            int mlevel = int.Parse(row["MLEVEL"].ToString());
            int mtopid = int.Parse(row["MTOPID"].ToString());

            if (mlevel == 1 && mtopid == -1)
            {
                XmlNodeList rootList = _xmldoc.SelectNodes("/Root/Item");

                foreach (XmlNode xn in rootList)
                {
                    _addOneTreeNode(rootTN, xn, false, selectedMID);
                }

                return;
            }
            else
            {
                int mid = selectedMID;

                int[] mids = new int[mlevel];

                for (int i = 0; i < mlevel; i++)
                {
                    DataRow dr_Temp = pfa.getModuleData(mid);

                    mids[i] = int.Parse(dr_Temp["MID"].ToString());

                    mid = int.Parse(dr_Temp["MTOPID"].ToString());
                }

                int[] sort_mids = new int[mlevel];

                for (int i = 0; i < mlevel; i++)
                {
                    sort_mids[i] = mids[mlevel - 1 - i];
                }

                for (int i = 0; i < mlevel; i++)
                {
                    if (i == 0)
                    {
                        XmlNodeList rootList = _xmldoc.SelectNodes("/Root/Item");

                        foreach (XmlNode xn in rootList)
                        {
                            _addOneTreeNode(rootTN, xn, false, sort_mids[i]);
                        }
                    }
                    else
                    {
                        string temp = "";

                        for (int k = 0; k < (i + 1); k++)
                        {
                            temp += "/" + sort_mids[k].ToString();
                        }

                        //string valuePath = "ROOT/1031/1036";

                        string valuePath = SysConfig.LEFTTREE_ROOT_VALUE + temp;

                        TreeNode treeNode = tv_modules.FindNode(valuePath);

                        treeNode.Expand();
                    }

                }

            }

 

        }