Using Treeview to display a directory structure

最新推荐文章于 2025-12-20 19:54:17 发布

转载最新推荐文章于 2025-12-20 19:54:17 发布 · 75 阅读

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原文链接：http://www.cnblogs.com/OceanChen/archive/2009/01/28/1381210.html

文章标签：

#xhtml #c#

本文介绍了一个使用 ASP.NET 和 C# 编写的简单应用，该应用能够递归地读取服务器上的目录结构，并将其展示为树形视图。通过 TreeNode 对象实现了文件夹及其子文件夹和文件的展示。

OK, I post the code directly with no unnecessary words:

Code
<%@ Page Language="C#" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">
    protected void Page_Load(object sender, EventArgs e)
    {
        if (Page.IsPostBack == false)
        {
            System.IO.DirectoryInfo RootDir = new System.IO.DirectoryInfo(Server.MapPath("~/"));

            // output the directory into a node
            TreeNode RootNode = OutputDirectory(RootDir, null);

            // add the output to the tree
            TreeView1.Nodes.Add(RootNode);
        }
    }

    TreeNode OutputDirectory(System.IO.DirectoryInfo directory, TreeNode parentNode)
    {
        // validate param
        if (directory == null) return null;

        // create a node for this directory
        TreeNode DirNode = new TreeNode(directory.Name);

        // get subdirectories of the current directory
        System.IO.DirectoryInfo[] SubDirectories = directory.GetDirectories();

        // output each subdirectory
        for (int DirectoryCount = 0; DirectoryCount < SubDirectories.Length; DirectoryCount++)
        {
            OutputDirectory(SubDirectories[DirectoryCount], DirNode);
        }

        // output the current directories files
        System.IO.FileInfo[] Files = directory.GetFiles();

        for (int FileCount = 0; FileCount < Files.Length; FileCount++)
        {
            DirNode.ChildNodes.Add(new TreeNode(Files[FileCount].Name));
        }

        // if the parent node is null, return this node
        // otherwise add this node to the parent and return the parent
        if (parentNode == null)
        {
            return DirNode;
        }
        else
        {
            parentNode.ChildNodes.Add(DirNode);
            return parentNode;
        }
    }
</script>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Using Treeview to display a directory structure</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:TreeView ID="TreeView1" runat="server">
        </asp:TreeView>
    </div>
    </form>
</body>
</html>

转载于:https://www.cnblogs.com/OceanChen/archive/2009/01/28/1381210.html