这里有代码：
using System;
using System.Collections.Generic;
namespace FolderTree
{
public class Folder
{
public string Name { get; set; }
public List<Folder> Folders { get; set; } = new List<Folder>();
public List<File> Files { get; set; } = new List<File>();
}
public class File
{
public string Name { get; set; }
}
class Program
{
static void Main(string[] args)
{
var cars = new List<string>()
{
"Car/",
"Car/BMW/",
"Car/Great Wall/",
"Car/Great Wall/Another/",
"Car/Great Wall/Another/test - file.bak",
"Car/Great Wall/Another/second - file.bak",
"Car/Great Wall/Car/",
"Car/Great Wall/local - copy.bak",
"Car/Great Wall/local - copy(2).bak",
"Car/Mercedes/process - file.bak",
"Car/Mercedes/process - file(2).bak",
"Car/test123 - file.bak"
};
var folders = GetFoldersFormStrings(cars);
ShowFolders(folders);
}
static List<Folder> GetFoldersFormStrings(List<string> strings)
{
var folders = new List<Folder>();
strings.Sort(StringComparer.InvariantCultureIgnoreCase);
var folderByPath = new Dictionary<string, Folder>();
foreach (var str in strings)
{
if (str.EndsWith("/")) // we have a folder
{
EnsureFolder(folders, folderByPath, str);
}
else // we have a file
{
var lastSlashPosition = str.LastIndexOf("/");
var parentFolderPath = str.Substring(0, lastSlashPosition + 1);
var parentFolder = EnsureFolder(folders, folderByPath, parentFolderPath);
var fileName = str.Substring(lastSlashPosition + 1);
var file = new File
{
Name = fileName
};
parentFolder.Files.Add(file);
}
}
return folders;
}
private static Folder EnsureFolder(List<Folder> rootFolders, Dictionary<string, Folder> folderByPath, string folderPath)
{
if (!folderByPath.TryGetValue(folderPath, out var folder))
{
var folderPathWithoutEndSlash = folderPath.TrimEnd('/');
var lastSlashPosition = folderPathWithoutEndSlash.LastIndexOf("/");
List<Folder> folders;
string folderName;
if (lastSlashPosition < 0) // it's a first level folder
{
folderName = folderPathWithoutEndSlash;
folders = rootFolders;
}
else
{
var parentFolderPath = folderPath.Substring(0, lastSlashPosition + 1);
folders = folderByPath[parentFolderPath].Folders;
folderName = folderPathWithoutEndSlash.Substring(lastSlashPosition + 1);
}
folder = new Folder
{
Name = folderName
};
folders.Add(folder);
folderByPath.Add(folderPath, folder);
}
return folder;
}
private static void ShowFolders(List<Folder> folders)
{
foreach (var folder in folders)
{
ShowFolder(folder, 0);
}
}
private static void ShowFolder(Folder folder, int indentation)
{
string folderIndentation = new string(' ', indentation);
string fileIndentation = folderIndentation + " ";
Console.WriteLine($"{folderIndentation}-{folder.Name}");
foreach (var file in folder.Files)
{
Console.WriteLine($"{fileIndentation}-{file.Name}");
}
foreach (var subfolder in folder.Folders)
{
ShowFolder(subfolder, indentation + 2);
}
}
}
}
我对字符串进行排序，以防止尝试在父文件夹之前创建子文件夹，并防止在创建包含文件夹之前添加文件。
对于每个字符串，如果它以斜杠结尾，则创建一个文件夹，否则创建文件。我按路径维护文件夹字典，以便在需要时获取父文件夹，这样我就可以将文件夹或文件添加到包含的文件夹中。
为了显示文件夹结构，我使用递归算法，当您深入树时，该算法会增加缩进。
剩下的只是字符串操作。
这是程序的输出：
-Car
-test123 - file.bak
-BMW
-Great Wall
-local - copy(2).bak
-local - copy.bak
-Another
-second - file.bak
-test - file.bak
-Car
-Mercedes
-process - file(2).bak
-process - file.bak
