如何在树视图中显示文件夹下的所有文件 [英] How to display all files under folders in treeview

问题描述

我正在尝试使用 winforms 获取树视图控件中的所有驱动器、文件夹、子文件夹和文件.我看过以下文章.

解决方案

更改 try 块中的代码(来自:

Iam trying to get all drives, folders, subfolders and files in treeview control using winforms. I have seen the following article.

http://codehill.com/2013/06/list-drives-and-folders-in-a-treeview-using-c/

but this only shows drives, folders and sub folders but not the files containing in these folders.

Please anyone help and guide that how can i view all these files under these folders in treeview, thanks in advance.

EDIT:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace GetDrives
{
    public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
        }

        private void Form2_Load(object sender, EventArgs e)
        {

            //get a list of the drives
            string[] drives = Environment.GetLogicalDrives();

            foreach (string drive in drives)
            {
                DriveInfo di = new DriveInfo(drive);
                int driveImage;

                switch (di.DriveType)    //set the drive's icon
                {
                    case DriveType.CDRom:
                        driveImage = 3;
                        break;
                    case DriveType.Network:
                        driveImage = 6;
                        break;
                    case DriveType.NoRootDirectory:
                        driveImage = 8;
                        break;
                    case DriveType.Unknown:
                        driveImage = 8;
                        break;
                    default:
                        driveImage = 2;
                        break;
                }

                TreeNode node = new TreeNode(drive.Substring(0, 1), driveImage, driveImage);
                node.Tag = drive;

                if (di.IsReady == true)
                    node.Nodes.Add("...");

                dirsTreeView.Nodes.Add(node);
            }

        }

        private void dirsTreeView_BeforeExpand(object sender, TreeViewCancelEventArgs e)
        {
            if (e.Node.Nodes.Count > 0)
            {
                if (e.Node.Nodes[0].Text == "..." && e.Node.Nodes[0].Tag == null)
                {
                    e.Node.Nodes.Clear();

                    //get the list of sub direcotires
                    string[] dirs = Directory.GetDirectories(e.Node.Tag.ToString());

                    foreach (string dir in dirs)
                    {
                        DirectoryInfo di = new DirectoryInfo(dir);
                        TreeNode node = new TreeNode(di.Name, 0, 1);

                        try
                        {
                            //keep the directory's full path in the tag for use later
                            node.Tag = dir;

                            //if the directory has sub directories add the place holder
                            if (di.GetDirectories().Count() > 0)
                                node.Nodes.Add(null, "...", 0, 0);

                            foreach (var file in di.GetFiles())
                            {
                                TreeNode n = new TreeNode(file.Name, 13, 13);
                                node.Nodes.Add(n);
                            }

                        }
                        catch (UnauthorizedAccessException)
                        {
                            //display a locked folder icon
                            node.ImageIndex = 12;
                            node.SelectedImageIndex = 12;
                        }
                        catch (Exception ex)
                        {
                            MessageBox.Show(ex.Message, "DirectoryLister",
                                MessageBoxButtons.OK, MessageBoxIcon.Error);
                        }
                        finally
                        {
                            e.Node.Nodes.Add(node);
                        }
                    }
                }
            }
        }
    }
}

I have now updated my code in application and using only one treeview, but the problem still exists. You can see in image, in my C drive i have a file name "courses outline.html" and ab.txt which are not showing in application, which i need to see. Please see iamge below to easily understand my requirement.

解决方案

Change the code in the try block (from: List Drives and Folders in a TreeView Using C#) as following:

EDIT:

Added following code, because the files of the root-directory were ignored:

//add files of rootdirectory
DirectoryInfo rootDir = new DirectoryInfo(e.Node.Tag.ToString());
foreach (var file in rootDir.GetFiles())
{
    TreeNode n = new TreeNode(file.Name, 13, 13);
    e.Node.Nodes.Add(n);
}

Full class:

private void treeView1_BeforeExpand(object sender, TreeViewCancelEventArgs e)
{
    if (e.Node.Nodes.Count > 0)
    {
        if (e.Node.Nodes[0].Text == "..." && e.Node.Nodes[0].Tag == null)
        {
            e.Node.Nodes.Clear();

            //get the list of sub direcotires
            string[] dirs = Directory.GetDirectories(e.Node.Tag.ToString());

            //add files of rootdirectory
            DirectoryInfo rootDir = new DirectoryInfo(e.Node.Tag.ToString());
            foreach (var file in rootDir.GetFiles())
            {
                TreeNode n = new TreeNode(file.Name, 13, 13);
                e.Node.Nodes.Add(n);
            }

            foreach (string dir in dirs)
            {
                DirectoryInfo di = new DirectoryInfo(dir);
                TreeNode node = new TreeNode(di.Name, 0, 1);

                try
                {
                    //keep the directory's full path in the tag for use later
                    node.Tag = dir;

                    //if the directory has sub directories add the place holder
                    if (di.GetDirectories().Count() > 0)
                        node.Nodes.Add(null, "...", 0, 0);

                    foreach (var file in di.GetFiles())
                    {
                        TreeNode n = new TreeNode(file.Name, 13, 13);
                        node.Nodes.Add(n);
                    }

                }
                catch (UnauthorizedAccessException)
                {
                    //display a locked folder icon
                    node.ImageIndex = 12;
                    node.SelectedImageIndex = 12;
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message, "DirectoryLister",
                        MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
                finally
                {
                    e.Node.Nodes.Add(node);
                }
            }
        }
    }
}

This look like following picture:

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