在程序中要做一个复制文件夹的功能,用递归写起来很方便。后来要某位仁兄(自己知道就行了 - -)实现一个类似的,貌似不是那么顺利,这里把复制文件夹的递归代码丢出来:

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Public Shared Sub CopyDirectory(source As String, destination As String)
  If Directory.Exists(destination) = False Then
    Try
      Directory.CreateDirectory(destination)
    Catch ex As Exception
      Logger.LogError(Logger.SourceType.Application, "Copy build process: Cannot create folder: " & destination)
      Return
    End Try
  End If
   
  For Each paths As String In Directory.GetDirectories(source)
    CopyDirectory(paths, Path.Combine(destination, paths.Substring(paths.LastIndexOfAny({""c, "/"c}) + 1)))
  Next
   
  For Each files As String In Directory.GetFiles(source)
    Try
      File.Copy(files, Path.Combine(destination, files.Substring(files.LastIndexOfAny({""c, "/"c}) + 1)), True)
      _copiedFiles += 1
    Catch ex As Exception
      Logger.LogError(Logger.SourceType.Application, "Copy build process: Cannot copy file: " & files)
    End Try
  Next
   
End Sub

递归的程序实在是很简洁很漂亮吧?后来又写了一个在文件夹中搜索文件的方法,也是递归的,那么在这里就一并丢出来:

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''' <summary>
''' Search the specified file in the folder and its sub folders and return its full path name. Empty string if not found.
''' </summary>
''' <param name="fileName">The file to search (no folder).</param>
''' <remarks></remarks>
Public Shared Function SearchFile(folder As String, fileName As String) As String
  If Directory.Exists(folder) = False Then Return String.Empty
   
  fileName = fileName.Trim.ToLower
   
  If fileName.IndexOfAny({""c, "/"c}) >= 0 Then
    fileName = GetFileName(fileName)
  End If
   
  Dim list() As String = Directory.GetFiles(folder)
   
  For i As Integer = 0 To list.GetUpperBound(0)
    If GetFileName(list(i)).Trim.ToLower = fileName Then Return list(i)
  Next
   
  Dim directories() As String = Directory.GetDirectories(folder)
   
  For i As Integer = 0 To directories.GetUpperBound(0)
    Dim return_file As String = SearchFile(directories(i), fileName)
   
    If return_file.Length > 0 Then Return return_file
  Next
   
  Return String.Empty
End Function

  GetFileName是我自己写的一个把路径去掉只剩下文件名和扩展名的方法。

  这两段代码实在是太简单了,所以我觉得没有什么地方要解释了(其实是准备下班走人了)。