C# 构建目录结构
我的情况是,我得到了一个代表目录结构的列表,格式如下:C# 构建目录结构,c#,recursion,C#,Recursion,我的情况是,我得到了一个代表目录结构的列表,格式如下: "My Folder\Images" "My Folder\Images\Gif" "My Folder\Images\JPG" "My Folder\Media" "My Folder\Media\Mov" "My Folder\Media\Mov\QT" "My Folder\Media\MPG" 对可以嵌套多少层没有限制 我需要构建一个表示树视图的东西,格式如下: public class Folder { public s
"My Folder\Images"
"My Folder\Images\Gif"
"My Folder\Images\JPG"
"My Folder\Media"
"My Folder\Media\Mov"
"My Folder\Media\Mov\QT"
"My Folder\Media\MPG"
对可以嵌套多少层没有限制
我需要构建一个表示树视图的东西,格式如下:
public class Folder
{
public string FolderName { get; set; }
public List<Folder> Folders{ get; set; } // a list of subfolders
}
公共类文件夹
{
公共字符串FolderName{get;set;}
公用列表文件夹{get;set;}//子文件夹列表
}
我只是无法获得构建此功能的重现功能。任何来自大师的帮助都将不胜感激
短暂性脑缺血发作
编辑:我的完整类定义是:
public class Folder
{
public string Name { get; set; }
public List<Folder> Folders { get; set; }
public Folder(List<string> input)
{
foreach (var folder in input)
{
var delimPos = folder.IndexOf("\\");
if (delimPos == -1)
{
Name = folder ;
}
else
{
Name = folder.Substring(0, delimPos);
var subFolders= input.Select(o => o.Substring(delimPos + 1)).ToList();
Folders= new List<Folder>();
foreach (var subFolder in subFolders)
{
Folders.Add(new Folder(new List<string>() { subFolder }));
}
}
}
}
}
公共类文件夹
{
公共字符串名称{get;set;}
公用列表文件夹{get;set;}
公用文件夹(列表输入)
{
foreach(输入中的var文件夹)
{
var delimPos=folder.IndexOf(“\\”);
如果(delimPos==-1)
{
名称=文件夹;
}
其他的
{
Name=folder.Substring(0,delimPos);
var subFolders=input.Select(o=>o.Substring(delimPos+1)).ToList();
文件夹=新列表();
foreach(子文件夹中的var子文件夹)
{
添加(新文件夹(新列表(){subFolder}));
}
}
}
}
}
有关通过字符串解析进行的简单节点遍历,请参考以下示例
private void button1_Click(object sender, EventArgs e)
{
var folders = ProcessNode("My Folder\\Media\\Mov\\QT", 0);
MessageBox.Show("finished");
}
private Folder ProcessNode(string input, int index)
{
var newIndex = input.IndexOf("\\", index + 1);
if (newIndex < 0) return new Folder() { FolderName = input.Substring(index, input.Length - index) };
var nodeName = input.Substring(index, newIndex - index);
var thisFolder = new Folder()
{
FolderName = nodeName,
Folders = new List<Folder>()
};
thisFolder.Folders.Add(ProcessNode(input, newIndex));
return thisFolder;
}
private void按钮1\u单击(对象发送者,事件参数e)
{
var folders=ProcessNode(“我的文件夹\\媒体\\Mov\\QT”,0);
MessageBox.Show(“完成”);
}
私有文件夹ProcessNode(字符串输入,int索引)
{
var newIndex=input.IndexOf(“\\”,index+1);
if(newIndex<0)返回新文件夹(){FolderName=input.Substring(index,input.Length-index)};
var nodeName=input.Substring(index,newIndex-index);
var thisFolder=新文件夹()
{
FolderName=nodeName,
文件夹=新列表()
};
添加(ProcessNode(输入,newIndex));
返回此文件夹;
}
如果要使用拆分函数和列表
private void button1_Click(object sender, EventArgs e)
{
var splitted = "My Folder\\Media\\Mov\\QT".Split('\\').ToList();
var foldersList = ProcessNode(splitted, 0);
MessageBox.Show("finished");
}
private Folder ProcessNode(List<string> input, int index)
{
if (index >= input.Count) return null;
var thisFolder = new Folder()
{
FolderName = input[index],
Folders = new List<Folder>()
};
thisFolder.Folders.Add(ProcessNode(input, index + 1));
return thisFolder;
}
private void按钮1\u单击(对象发送者,事件参数e)
{
var splitted=“My Folder\\Media\\Mov\\QT”.Split('\\').ToList();
var foldersList=ProcessNode(已拆分,0);
MessageBox.Show(“完成”);
}
私有文件夹ProcessNode(列表输入,int索引)
{
if(index>=input.Count)返回null;
var thisFolder=新文件夹()
{
FolderName=输入[索引],
文件夹=新列表()
};
添加(ProcessNode(输入,索引+1));
返回此文件夹;
}
您当然会遇到这样的问题:在分割和处理图像\Gif
之后,在分割和处理图像\JPG
时,您将重新添加另一个图像
文件夹。第一个将有一个子文件夹Gif
,第二个将有一个子文件夹JPG
您可以通过在第一个零件上分组并仅处理以下零件来解决此问题:
public static List<Folder> ParseInputRecursive(string[] input)
{
var foldersInParts = input.Select(f => f.Split(new [] { '\\' }, StringSplitOptions.RemoveEmptyEntries).ToList()).ToList();
return ParseInputRecursive(foldersInParts);
}
public static List<Folder> ParseInputRecursive(List<List<string>> input)
{
var folders = new List<Folder>();
foreach (var folderPartsGroup in input.GroupBy(p => p[0]))
{
var folder = new Folder { Name = folderPartsGroup.Key };
// Remove parent name, skip parent itself
var subFolders = folderPartsGroup.Select(f => f.Skip(1).ToList()).Where(f => f.Count > 0).ToList();
folder.Folders = ParseInputRecursive(subFolders);
folders.Add(folder);
}
return folders;
}
鉴于这一投入:
var input = new string[]
{
@"F1\Images",
@"F1\Images\Gif",
@"F1\Images\JPG",
@"F1\Media",
@"F1\Media\Mov",
@"F2\Docs",
@"F2\Docs\Foo",
};
给出此输出:
F1
*Images
**Gif
**JPG
*Media
**Mov
F2
*Docs
**Foo
下面是一个非递归解决方案,它根据需要解析和打印值。如果有帮助,请告诉我 逻辑
共享您的递归函数。让我们看看编辑有什么问题:添加了完整的类定义@我现在有点困惑。您想遍历单个字符串还是字符串列表?我希望每个文件夹都有一个名称属性以及它包含的子文件夹列表(每个子文件夹都有相同的操作)。请查看下面的非递归方法,并让我知道它是否适合您。完美。正是我需要的。
F1
*Images
**Gif
**JPG
*Media
**Mov
F2
*Docs
**Foo
public static IEnumerable<Folder> Parse(IEnumerable<string> locations)
{
var folders = new List<Folder>();
foreach (var location in locations)
{
var parts = location.Split(new[]{Path.DirectorySeparatorChar}, StringSplitOptions.RemoveEmptyEntries);
Folder currentFolder = null;
foreach (var part in parts)
{
var parentFolders = currentFolder!=null ? currentFolder.Folders : folders;
currentFolder = parentFolders.Find(folder => folder.Name == part) ?? new Folder { Name = part };
if (!parentFolders.Any(folder => folder.Name.Equals(currentFolder.Name)))
{
parentFolders.Add(currentFolder);
}
}
}
return folders;
}
//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5
using System;
using System.IO;
using System.Linq;
using System.Collections.Generic;
namespace Rextester
{
public class Folder
{
public string Name { get; set; }
public List<Folder> Folders { get; internal set; }
public Folder()
{
this.Folders = new List<Folder>();
}
public static IEnumerable<Folder> Parse(IEnumerable<string> locations)
{
var folders = new List<Folder>();
foreach (var location in locations)
{
var parts = location.Split(new[]{Path.DirectorySeparatorChar}, StringSplitOptions.RemoveEmptyEntries);
Folder currentFolder = null;
foreach (var part in parts)
{
var parentFolders = currentFolder!=null ? currentFolder.Folders : folders;
currentFolder = parentFolders.Find(folder => folder.Name == part) ?? new Folder { Name = part };
if (!parentFolders.Any(folder => folder.Name.Equals(currentFolder.Name)))
{
parentFolders.Add(currentFolder);
}
}
}
return folders;
}
public override string ToString()
{
if (this.Folders.Count == 0)
{
return this.Name;
}
else
{
var folders = this.Folders
.SelectMany(folder => folder.ToString().Split(new[] { Environment.NewLine }, StringSplitOptions.None))
.Select(f => this.Name + Path.DirectorySeparatorChar + f);
return string.Join(Environment.NewLine, folders);
}
}
}
public class Program
{
public static void Main(string[] args)
{
var locationList = new List<string>()
{
@"My Folder\Images",
@"My Folder\Media",
@"My Folder\Images\Gif",
@"My Folder\Images\JPG",
@"My Folder\Media\Mov",
@"My Folder\Media\Mov\QT",
@"My Folder\Media\MPG"
};
var folderLists = Folder.Parse(locationList);
Console.WriteLine(string.Join(Environment.NewLine, folderLists));
Console.ReadLine();
}
}
}
My Folder\Images\Gif
My Folder\Images\JPG
My Folder\Media\Mov\QT
My Folder\Media\MPG