如何用treeview控件显示硬盘中的文件和目录？

Question

如何用treeview控件遍历显示硬盘中的文件和目录？

Answer 1

下面的是前两天我用vb.net写的一个用树显示当前虚拟目录文件夹的代码，你可以参考一下：Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
    '在此处放置初始化页的用户代码
    If Not IsPostBack Then
        Dim getdir As New DirectoryInfo(Server.MapPath("/"))
        For Each fsi As DirectoryInfo In getdir.GetDirectories
            Dim fi As DirectoryInfo = CType(fsi, DirectoryInfo)
            Dim myTreeNode As New TreeNode
            myTreeNode.Text = fi.Name
            myTreeNode.NodeData = fi.FullName
            TreeView1.Nodes.Add(myTreeNode)
            If (fi.GetDirectories.Length > 0) Then
                Dim myTreeNode1 As New TreeNode
                myTreeNode1.Text = ""
                TreeView1.Nodes(TreeView1.Nodes.IndexOf(myTreeNode)).Nodes.Add(myTreeNode1)
            End If
        Next
    End If
End SubPrivate Sub TreeView1_SelectedIndexChange(ByVal sender As Object, ByVal e As Microsoft.Web.UI.WebControls.TreeViewSelectEventArgs) Handles TreeView1.SelectedIndexChange
    TreeViewNodeLoad(TreeView1, e.NewNode)
End SubPrivate Sub TreeView1_Expand(ByVal sender As Object, ByVal e As Microsoft.Web.UI.WebControls.TreeViewClickEventArgs) Handles TreeView1.Expand
    TreeViewNodeLoad(TreeView1, e.Node)
End SubPrivate Sub TreeViewNodeLoad(ByVal sender As Object, ByVal e As String)
    Dim tn As TreeNode = CType(CType(sender, TreeView).GetNodeFromIndex(e), TreeNode)
    Dim text As String = tn.NodeData
    tn.Nodes.Clear()
    For Each fsi As String In Directory.GetDirectories(text)
        Dim myTreeNode As New TreeNode
        Dim getdir As New DirectoryInfo(fsi)
        myTreeNode.Text = getdir.Name
        myTreeNode.NodeData = fsi
        CType(sender, TreeView).GetNodeFromIndex(e).Nodes.Add(myTreeNode)
        If (getdir.GetDirectories.Length > 0) Then
            Dim myTreeNode1 As New TreeNode
            myTreeNode1.Text = ""
            CType(sender, TreeView).GetNodeFromIndex(e).Nodes(CType(sender, TreeView).GetNodeFromIndex(e).Nodes.IndexOf(myTreeNode)).Nodes.Add(myTreeNode1)
        End If
    Next
End Sub你只需加入文件的显示即可

Answer 2

可以参考这个：
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.IO;namespace FolderBrowser
{
/// <summary>
/// Summary description for Form1.
/// </summary>
public class FolderDialog : System.Windows.Forms.Form
{
        private System.Windows.Forms.ImageList fileIconList;
        private System.Windows.Forms.TreeView FolderTree;
        private System.ComponentModel.IContainer components; public FolderDialog()
{
//
// Required for Windows Form Designer support
//
InitializeComponent(); //
// TODO: Add any constructor code after InitializeComponent call
//
} /// <summary>
/// Clean up any resources being used.
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null) 
{
components.Dispose();
}
}
base.Dispose( disposing );
} #region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
            this.components = new System.ComponentModel.Container();
            System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(FolderDialog));
            this.fileIconList = new System.Windows.Forms.ImageList(this.components);
            this.FolderTree = new System.Windows.Forms.TreeView();
            this.SuspendLayout();
            // 
            // fileIconList
            // 
            this.fileIconList.ColorDepth = System.Windows.Forms.ColorDepth.Depth8Bit;
            this.fileIconList.ImageSize = new System.Drawing.Size(16, 16);
            this.fileIconList.ImageStream = ((System.Windows.Forms.ImageListStreamer)(resources.GetObject("fileIconList.ImageStream")));
            this.fileIconList.TransparentColor = System.Drawing.Color.Transparent;
            // 
            // FolderTree
            // 
            this.FolderTree.Anchor = (((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
                | System.Windows.Forms.AnchorStyles.Left) 
                | System.Windows.Forms.AnchorStyles.Right);
            this.FolderTree.ImageList = this.fileIconList;
            this.FolderTree.Name = "FolderTree";
            this.FolderTree.Nodes.AddRange(new System.Windows.Forms.TreeNode[] {
                                                                                   new System.Windows.Forms.TreeNode("我的电脑", 0, 0)});
            this.FolderTree.Size = new System.Drawing.Size(470, 350);
            this.FolderTree.TabIndex = 0;
            this.FolderTree.AfterSelect += new System.Windows.Forms.TreeViewEventHandler(this.FolderTree_AfterSelect);
            // 
            // FolderDialog
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
            this.ClientSize = new System.Drawing.Size(472, 353);
            this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                          this.FolderTree});
            this.Name = "FolderDialog";
            this.Text = "浏览我的电脑";
            this.ResumeLayout(false);        }
#endregion /// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main() 
{
Application.Run(new FolderDialog());
}        private void FolderTree_AfterSelect(object sender, System.Windows.Forms.TreeViewEventArgs e)
        {
            if(e.Node.Text.ToString()!="我的电脑")
                EnumDirectories(e.Node);
            else
                EnumDrives(e.Node);
        }        private void EnumDrives(TreeNode ParentNode)
        {
            if(ParentNode.Nodes.Count==0)
            {    
                foreach(string drive in Directory.GetLogicalDrives())
                {
                    FolderTree.SelectedNode=ParentNode;
                    TreeNode TempNode=new TreeNode();
                    TempNode.Text=drive.Substring(0,drive.Length-1);
                    TempNode.Tag=drive;
                    TempNode.ImageIndex=1;
                    TempNode.SelectedImageIndex=1; 
                    FolderTree.SelectedNode.Nodes.Add(TempNode);
                    FolderTree.SelectedNode.Nodes[FolderTree.SelectedNode.Nodes.Count-1].EnsureVisible();
                }
            }
        }        private void EnumDirectories(TreeNode ParentNode)
        {
            FolderTree.SelectedNode=ParentNode;
            string DirectoryPath=ParentNode.Tag.ToString();
            if(ParentNode.Nodes.Count==0)
            {
                if(DirectoryPath.Substring(DirectoryPath.Length-1)!=@"\")
                    DirectoryPath+=@"\";
                try
                {
                    foreach(string directory in Directory.GetDirectories(DirectoryPath))
                    {
                        TreeNode TempNode=new TreeNode();
                        TempNode.Text=directory.Substring(directory.LastIndexOf(@"\")+1);
                        TempNode.Tag=directory;
                        TempNode.ImageIndex=3;
                        TempNode.SelectedImageIndex=2;
                        FolderTree.SelectedNode.Nodes.Add(TempNode);
                        FolderTree.SelectedNode.Nodes[FolderTree.SelectedNode.Nodes.Count-1].EnsureVisible();
                    }
                }
                catch(Exception)
                {
                }
            }
        }
}
}

Answer 3

我觉得应该讲原理比较好，不要动不动就帖一大段代码，没有意思。
我们假设您已经知道如何给TreeView添加节点，现在主要的难题是怎么取得目录与文件，在.NET中，类DirectoryInfo可以取得目录及其子目录（使用DirectoryInfo对象的GetDirectories()方法），而DirectoryInfo对象的GetFiles()方法可以得到FileInfo[]，它就是一个目录下面的所有文件。
其实是一个遍历所有文件和目录的过程，最后你就可以得到硬盘中的所有文件/目录结构！