我遇到了一个问题。
我想遍历本地PC文件夹，包括目录，并针对文件系统层次结构中的每个文件夹计算编号系统。
根文件夹应计算为1,2,3等。
如果文件夹1中有三个子文件夹，则计算出的数字应为： 1.1,1.2,1.3
如果上面的子文件夹中有三个子文件夹，则计算出的数字应为： 1.1.1,1.1.2,1.1.3
如果文件夹2（根文件夹）中有三个子文件夹，则计算出的数字应为： 2.1,2.2,2.3
或以另一种方式表达：
1 Root Folder
1.1 Root Sub Folder 1
1.1.1 Sub Folder
1.1.2 Sub Folder
1.2 Root Sub Folder 2
1.2.1 List item
1.2.2 List item
等。等
然后应将此逻辑应用于所有文件夹和子文件夹。
输出示例
1.1.1 | "c:\Root\Folder1\Folder1\"
到目前为止，我在某些情况下似乎工作正常但在其他情况下可能会失败：
private string rootpath = @"C:\FolderHierarchy\";
private string FolderSequenceCountBase = "";
private int CurrentRootPathCount = 0;
private int Counter = 0;
private void CalculateFolderHierarchyNumbers()
{
//Get First List of Folders
string[] Dirs = Directory.GetDirectories(rootpath, "*.*", SearchOption.TopDirectoryOnly);
for (int i = 0; i < Dirs.Count(); i++)
{
FolderSequenceCountBase = (i + 1).ToString();
CurrentRootPathCount = i + 1;
Console.WriteLine("Processed folder '{0}'.", Dirs[i] + " = " + (i + 1));
GetSubDirs(Dirs[i]);
}
}
private void GetSubDirs(string item)
{
//Get next list of folders in the folder hierarchy
string[] SubDirs = Directory.GetDirectories(item, "*.*", SearchOption.TopDirectoryOnly);
foreach (var DirPath in SubDirs)
{
//Increment count of folders within the current folder list
Counter += 1;
Console.WriteLine("Processed folder '{0}'.", DirPath + " = " + FolderSequenceCountBase + "." + Counter);
}
Counter = 0;
//Get next list of folders in the folder hierarchy
foreach (var DirPath in SubDirs)
{
FolderSequenceCountBase += ".1";
GetSubDirs(DirPath);
}
}
希望这很清楚。
由于 瑞克
答案 0 :(得分：0)
所以你想要找到一个文件并获取它在目录及其所有父目录中的数量？因为我发现它很有趣我从头开始写东西。请注意，它目前尚未经过测试，但无论如何它可能会给你一个想法：
public static IEnumerable<FileEntryInfo> EnumerateFindFiles(string fileToFind, StringComparison comparison = StringComparison.CurrentCultureIgnoreCase, DirectoryInfo rootDir = null, string[] drivesToSearch = null)
{
IEnumerable<FileEntryInfo> foundEntries = Enumerable.Empty<FileEntryInfo>();
if (rootDir != null && drivesToSearch != null)
throw new ArgumentException("Specify either the root-dir or the drives to search, not both");
else if (rootDir != null)
{
foundEntries = EnumerateFindEntryRoot(fileToFind, rootDir, comparison);
}
else
{
if (drivesToSearch == null) // search the entire computer
drivesToSearch = System.Environment.GetLogicalDrives();
foreach (string dr in drivesToSearch)
{
System.IO.DriveInfo di = new System.IO.DriveInfo(dr);
if (!di.IsReady)
{
Console.WriteLine("The drive {0} could not be read", di.Name);
continue;
}
rootDir = di.RootDirectory;
foundEntries = foundEntries.Concat(EnumerateFindEntryRoot(fileToFind, rootDir, comparison));
}
}
foreach (FileEntryInfo entry in foundEntries)
yield return entry;
}
public class FileEntryInfo
{
public FileEntryInfo(string path, int number)
{
this.Path = path;
this.Number = number;
}
public int Number { get; set; }
public string Path { get; set; }
public FileEntryInfo Root { get; set; }
public IEnumerable<int> GetNumberTree()
{
Stack<FileEntryInfo> filo = new Stack<FileEntryInfo>();
FileEntryInfo entry = this;
while (entry.Root != null)
{
filo.Push(entry.Root);
entry = entry.Root;
}
while(filo.Count > 0)
yield return filo.Pop().Number;
yield return this.Number;
}
public override bool Equals(object obj)
{
FileEntryInfo fei = obj as FileEntryInfo;
if(obj == null) return false;
return Number == fei.Number && Path == fei.Path;
}
public override int GetHashCode()
{
return Path.GetHashCode();
}
public override string ToString()
{
return Path;
}
}
private static IEnumerable<FileEntryInfo> EnumerateFindEntryRoot(string fileNameToFind, DirectoryInfo rootDir, StringComparison comparison = StringComparison.CurrentCultureIgnoreCase)
{
Queue<FileEntryInfo> queue = new Queue<FileEntryInfo>();
FileEntryInfo root = new FileEntryInfo(rootDir.FullName, 1);
queue.Enqueue(root);
while (queue.Count > 0)
{
FileEntryInfo fe = queue.Dequeue();
List<FileEntryInfo> validFiles = new List<FileEntryInfo>();
try
{ // you cannot yield from try-catch, hence this approach
FileAttributes attr = File.GetAttributes(fe.Path);
//detect whether its a directory or file
bool isDirectory = (attr & FileAttributes.Directory) == FileAttributes.Directory;
if (isDirectory)
{
int entryCount = 0;
foreach (string entry in Directory.EnumerateFileSystemEntries(fe.Path))
{
entryCount++;
FileEntryInfo subEntry = new FileEntryInfo(entry, entryCount);
subEntry.Root = fe;
queue.Enqueue(subEntry);
attr = File.GetAttributes(entry);
isDirectory = (attr & FileAttributes.Directory) == FileAttributes.Directory;
if(!isDirectory)
validFiles.Add(subEntry);
}
}
} catch (Exception ex)
{
Console.Error.WriteLine(ex); // ignore, proceed
}
foreach (FileEntryInfo entry in validFiles)
{
string fileName = Path.GetFileName(entry.Path);
if (fileName.Equals(fileNameToFind, comparison))
yield return entry;
}
}
}
以下是我测试的方式：
var allEntriesFound = EnumerateFindFiles("PresentationFramework.dll").ToList();
if(allEntriesFound.Any())
{
foreach (FileEntryInfo entry in allEntriesFound)
Console.WriteLine("{0}: Number: {1}", entry.Path, entry.Number);
// here your exact requirement:
string result = string.Join(".", allEntriesFound[0].GetNumberTree());
Console.WriteLine(result);
}
还添加了一种指定根目录的方法，以防止搜索整个文件系统，用法：
var allEntriesFound = EnumerateFindFiles(
"PresentationFramework.dll",
StringComparison.CurrentCultureIgnoreCase,
new DirectoryInfo(@"C:\Windows"))
.ToList();