<%@ Page Title="主頁" Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true"
    CodeBehind="Default.aspx.cs" Inherits="選擇伺服器裡面的檔案._Default" %>

<asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent">
    <script type="text/javascript">
        function postBackByObject() {
            var o = window.event.srcElement;
            if (o.tagName == "INPUT" && o.type == "checkbox") {
                __doPostBack("", "");
            }
        } 
    </script>
</asp:Content>
<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
    <h2>
        歡迎使用 ASP.NET!
    </h2>
    <p>
        若要了解關於 ASP.NET 的詳細資訊，請訪問 <a href="http://www.asp.net/cn" title="ASP.NET 網站">www.asp.net/cn</a>。
    </p>
    <p>
        您還可以找到 <a href="http://go.microsoft.com/fwlink/?LinkID=152368" title="MSDN ASP.NET 文件">
            MSDN 上有關 ASP.NET 的文件</a>。
    </p>
    <asp:Button runat="server" ID="獲取檔案路徑" Text="獲取檔案路徑" OnClick="獲取檔案路徑_Click" />
    <asp:TreeView ID="tvFloder" runat="server" ShowCheckBoxes="Leaf" OnTreeNodeExpanded="tvFloder_TreeNodeExpanded"
        OnTreeNodeCheckChanged="tvFloder_TreeNodeCheckChanged">
    </asp:TreeView>
</asp:Content>
 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;
using System.Data;

namespace 選擇伺服器裡面的檔案
{
    public partial class _Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            tvFloder.Attributes.Add("onclick", "postBackByObject()"); 
        }




        protected void tvFloder_TreeNodeExpanded(object sender, TreeNodeEventArgs e)
        {
            if (e.Node.Depth == 0)
                return;
                e.Node.ChildNodes.Clear();

                GetDirectories(e.Node.Value, e.Node);
        }


        /// <summary>
        /// 迴圈遍歷獲得某一目錄下的所有檔案資訊
        /// </summary>
        /// <param name="path">目錄名</param>
        /// <param name="tn">樹節點</param>
        private static void GetDirectories(string path, TreeNode tn)
        {
            if (string.IsNullOrEmpty(path))
                return;

            if (!Directory.Exists(path))
                return;

            string[] directories = Directory.GetFileSystemEntries(path);

            //先遍歷這個目錄下的資料夾
            foreach (string dir in directories)
            {
                TreeNode subtn = new TreeNode();
                if (File.Exists(dir))
                {
                    subtn.ShowCheckBox = true;
                    subtn.ImageUrl = "images/file.png";
                }
                else
                {
                    subtn.ShowCheckBox = false;
                    subtn.ImageUrl = "images/folder.png";
                }
                subtn.Text = dir;
                subtn.Expanded = false;
                GetDirectories(dir, subtn);
                tn.ChildNodes.Add(subtn);
            }
        }



        protected void 獲取檔案路徑_Click(object sender, EventArgs e)
        {
            string path = "F:\\技術研究\\選擇伺服器裡面的檔案\\選擇伺服器裡面的檔案\\files";
            TreeNode tnThird = new TreeNode();
            tnThird.Text = "根節點";
            tvFloder.Nodes.Add(tnThird);
            GetDirectories(path, tnThird);
        }

        protected void tvFloder_TreeNodeCheckChanged(object sender, TreeNodeEventArgs e)
        {
           Response.Write("<script>alert('"+e.Node.Text+"')</script>");
        }




    }
}