uctree.ascx.cs

高校 学籍管理、成绩、收费、网上教学

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 System.IO;

public partial class UserControl_UCTree : System.Web.UI.UserControl
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }

    public void Treeview1_TreeNodePopulate(object sender, TreeNodeEventArgs e)
    {
        if (true)
        {
            if (e.Node.ChildNodes.Count == 0)
            {
                LoadChildNode(e.Node);
            }
        }
    }

    private void LoadChildNode(TreeNode node)
    {

        DirectoryInfo directory;
        directory = new DirectoryInfo(node.Value);

        foreach (DirectoryInfo sub in directory.GetDirectories())
        {

            TreeNode subNode = new TreeNode(sub.Name);
            subNode.Value = sub.FullName;

            try
            {
                if (sub.GetDirectories().Length > 0 || sub.GetFiles().Length > 0)
                {
                    subNode.SelectAction = TreeNodeSelectAction.SelectExpand;
                    subNode.PopulateOnDemand = true;
                    subNode.NavigateUrl = "#";
                }
            }
            catch { subNode.ImageUrl = "WebResource.axd?a=s&r=TreeView_XP_Explorer_ParentNode.gif&t=632242003305625000"; }
            node.ChildNodes.Add(subNode);

        }

        foreach (FileInfo fi in directory.GetFiles())
        {
            TreeNode subNode = new TreeNode(fi.Name);
            node.ChildNodes.Add(subNode);
        }
    }

}