asp:TreeNode 问题

Question

asp:TreeNode 可以隐藏一部分吗？
要是可以的话 代码怎么写？

Answer 1

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using His.Oracle;
using System.Data.OracleClient;public partial class kmgl_kmgl : System.Web.UI.Page
{
    private Database db = new Database();
    protected void Page_Load(object sender, EventArgs e)
    {
        CreateNewTree();
        TreeView1.CollapseAll();
        if (Request.Params["Tree"] != null)
        {
            TreeView1.Nodes[0].Expand();
            TreeView1.Nodes[0].ImageUrl = "~/images/treeImage/c.gif";
            string strKmdm = Request.Params["Tree"].ToString().Trim();
            int length = strKmdm.Length / 3;
            foreach (TreeNode tn in TreeView1.Nodes[0].ChildNodes)
            {
                if (tn.Value == strKmdm.Substring(0, 3))
                {
                    tn.Expand();
                    //tn.Parent.Expand();
                    tn.Selected = true;
                    //tn.Parent.Selected = true;
                    tn.ImageUrl = "~/images/treeImage/c.gif";
                    //tn.Parent.ImageUrl = "~/images/treeImage/c.gif";
                    extend(tn, length, strKmdm);
                }
                else
                {
                    tn.Selected = false;
                }
            }
        }    }
    private void extend(TreeNode tn, int intDepth, string value)
    {
        foreach (TreeNode tnc in tn.ChildNodes)
        {
            for (int i = 1; i < intDepth + 1; i++)
            {
                if (tnc.Value == value.Substring(0, 3 * i))
                {
                    tnc.Expand();
                    tnc.Selected = true;
                    tnc.ImageUrl = "~/images/treeImage/c.gif";
                    extend(tnc, intDepth, value);
                }
                else
                {
                    tnc.Selected = false;
                }
            }
        }
    }
    private void CreateNewTree()
    {
        TreeNode FirstNode = new TreeNode();
        FirstNode.Text = "科目管理";
        FirstNode.Value = "0";
        FirstNode.SelectAction = TreeNodeSelectAction.Expand;        FirstNode.ImageUrl = "~/images/treeImage/d.gif";
        TreeView1.Nodes.Add(FirstNode);        #region 一级根
        DataSet ds1 = new DataSet();
        string strSql = "select * from kmgl where kmdm like '00_' and deflag='0' order by kmbm";
        ds1 = db.GetDataSet(strSql);
        DataRow[] dr1 = ds1.Tables["MyData"].Select("1=1");
        if (dr1.Length > 0)
        {
            for (int i = 0; i < dr1.Length; i++)
            {
                TreeNode node1 = new TreeNode();
                node1.Text = dr1[i]["kmbm"].ToString().Trim() + " " + dr1[i]["kmmc"].ToString().Trim();
                node1.Value = dr1[i]["kmdm"].ToString().Trim();
                node1.NavigateUrl = "kmgl_Main.aspx?par=" + node1.Value;
                node1.Target = "kmgl_Main";
                node1.ImageUrl = "~/images/treeImage/d.gif";
                node1.SelectAction = TreeNodeSelectAction.Expand;
                TreeView1.Nodes.Add(node1);
                FirstNode.ChildNodes.Add(node1);
                CreateChildrenNode(dr1[i]["kmdm"].ToString(), node1);
            }
        }
        else
        {
            return;
        }    }
        #endregion    /// <summary>
    /// 绑定树
    /// </summary>
    /// <param name="table">树数据集</param>
    /// <param name="strKmdm">父节点代码</param>
    /// <param name="node">父节点</param>
    private void CreateChildrenNode(string strKmdm, TreeNode node)
    {        // 子树集合
        DataSet ds = new DataSet();
        string strSql1 = "select * from kmgl where kmdm like '" + strKmdm + "___' and kmdm!='" + strKmdm + "' and deflag='0' order by kmbm";
        ds = db.GetDataSet(strSql1);
        DataRow[] dr = ds.Tables["MyData"].Select("1=1");
        if (dr.Length > 0)
        {
            for (int i = 0; i < dr.Length; i++)
            {
                TreeNode node2 = new TreeNode();                node2.Text = dr[i]["kmbm"].ToString().Trim() + " " + dr[i]["kmmc"].ToString().Trim();
                node2.Value = dr[i]["kmdm"].ToString().Trim();
                node2.NavigateUrl = "kmgl_Main.aspx?par=" + node2.Value;
                node2.Target = "kmgl_Main";
                node2.ImageUrl = "~/images/treeImage/d.gif";
                node2.SelectAction = TreeNodeSelectAction.Expand;
                node.ChildNodes.Add(node2);
                CreateChildrenNode(dr[i]["kmdm"].ToString(), node2);            }        }
        else
        {
            return;
        }    }
}从数据库动态生成的

Answer 2

遍历循环 无限递归  private Database db = new Database();
    protected void Page_Load(object sender, EventArgs e)
    {
        CreateNewTree();
        TreeView1.CollapseAll();
        if (Request.Params["Tree"] != null)
        {
            TreeView1.Nodes[0].Expand();
            TreeView1.Nodes[0].ImageUrl = "~/images/treeImage/c.gif";
            string strKmdm = Request.Params["Tree"].ToString().Trim();
            int length = strKmdm.Length / 3;
            foreach (TreeNode tn in TreeView1.Nodes[0].ChildNodes)
            {
                if (tn.Value == strKmdm.Substring(0, 3))
                {
                    tn.Expand();
                    //tn.Parent.Expand();
                    tn.Selected = true;
                    //tn.Parent.Selected = true;
                    tn.ImageUrl = "~/images/treeImage/c.gif";
                    //tn.Parent.ImageUrl = "~/images/treeImage/c.gif";
                    extend(tn, length, strKmdm);
                }
                else
                {
                    tn.Selected = false;
                }
            }
        }    }
    private void extend(TreeNode tn, int intDepth, string value)
    {
        foreach (TreeNode tnc in tn.ChildNodes)
        {
            for (int i = 1; i < intDepth + 1; i++)
            {
                if (tnc.Value == value.Substring(0, 3 * i))
                {
                    tnc.Expand();
                    tnc.Selected = true;
                    tnc.ImageUrl = "~/images/treeImage/c.gif";
                    extend(tnc, intDepth, value);
                }
                else
                {
                    tnc.Selected = false;
                }
            }
        }
    }
    private void CreateNewTree()
    {
        TreeNode FirstNode = new TreeNode();
        FirstNode.Text = "科目管理";
        FirstNode.Value = "0";
        FirstNode.SelectAction = TreeNodeSelectAction.Expand;        FirstNode.ImageUrl = "~/images/treeImage/d.gif";
        TreeView1.Nodes.Add(FirstNode);        #region 一级根
        DataSet ds1 = new DataSet();
        string strSql = "select * from kmgl where kmdm like '00_' and deflag='0' order by kmbm";
        ds1 = db.GetDataSet(strSql);
        DataRow[] dr1 = ds1.Tables["MyData"].Select("1=1");
        if (dr1.Length > 0)
        {
            for (int i = 0; i < dr1.Length; i++)
            {
                TreeNode node1 = new TreeNode();
                node1.Text = dr1[i]["kmbm"].ToString().Trim() + " " + dr1[i]["kmmc"].ToString().Trim();
                node1.Value = dr1[i]["kmdm"].ToString().Trim();
                node1.NavigateUrl = "kmgl_Main.aspx?par=" + node1.Value;
                node1.Target = "kmgl_Main";
                node1.ImageUrl = "~/images/treeImage/d.gif";
                node1.SelectAction = TreeNodeSelectAction.Expand;
                TreeView1.Nodes.Add(node1);
                FirstNode.ChildNodes.Add(node1);
                CreateChildrenNode(dr1[i]["kmdm"].ToString(), node1);
            }
        }
        else
        {
            return;
        }    }
        #endregion    /// <summary>
    /// 绑定树
    /// </summary>
    /// <param name="table">树数据集</param>
    /// <param name="strKmdm">父节点代码</param>
    /// <param name="node">父节点</param>
    private void CreateChildrenNode(string strKmdm, TreeNode node)
    {        // 子树集合
        DataSet ds = new DataSet();
        string strSql1 = "select * from kmgl where kmdm like '" + strKmdm + "___' and kmdm!='" + strKmdm + "' and deflag='0' order by kmbm";
        ds = db.GetDataSet(strSql1);
        DataRow[] dr = ds.Tables["MyData"].Select("1=1");
        if (dr.Length > 0)
        {
            for (int i = 0; i < dr.Length; i++)
            {
                TreeNode node2 = new TreeNode();                node2.Text = dr[i]["kmbm"].ToString().Trim() + " " + dr[i]["kmmc"].ToString().Trim();
                node2.Value = dr[i]["kmdm"].ToString().Trim();
                node2.NavigateUrl = "kmgl_Main.aspx?par=" + node2.Value;
                node2.Target = "kmgl_Main";
                node2.ImageUrl = "~/images/treeImage/d.gif";
                node2.SelectAction = TreeNodeSelectAction.Expand;
                node.ChildNodes.Add(node2);
                CreateChildrenNode(dr[i]["kmdm"].ToString(), node2);            }        }
        else
        {
            return;
        }    }