function Newfile as fileinfo
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Dim dic As New System.IO.DirectoryInfo("C:\Users\Q\Desktop\数据")
Dim files = dic.GetFiles.OrderByDescending(Function(s) s.CreationTime)
if files.
return files.first
end function
注意引入 system.linq
先用System.IO.Directory.GetDirectories函数获取子目录的名称(包括其路径),再用System.IO.Path.GetFileName获取子目录的名称。下面是代码:
Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
For Each s In System.IO.Directory.GetDirectories("C:\Windows")
Console.WriteLine(System.IO.Path.GetFileName(s))
Next
End Sub
下面是部分输出:
Application Data
AppPatch
assembly
BOCNET
Boot
Branding
ConfigSetRoot
Cursors
Debug
DigitalLocker
Downloaded Installations
Downloaded Program Files
ehome
en-US
Fonts
Globalization
Help
...
可能有更简洁的方法,你可以到MSDN看看
System.IO.Directory.GetDirectories:
System.IO.Path.GetFileName:
通用 I/O 任务:
Dim dDirectory As System.IO.Directory
Dim sName() As String
sName = dDirectory.GetFiles(path)
Dim dialog As OpenFileDialog = New OpenFileDialog
If dialog.ShowDialog() = Windows.Forms.DialogResult.OK Then
Dim filename As String
filename = dialog.FileName
Dim results() As String
results = filename.Split("\")
filename = results(results.Length - 1)
filename = filename.Substring(0, filename.LastIndexOf("."))
MessageBox.Show(filename)
End If
dialog.Dispose()
获取方法,参考实例如下:
'获取路径名各部分: 如: c:\dir1001\aaa.txt
'获取路径路径 c:\dir1001\
Public Function GetFileName(FilePathFileName As String) As String '获取文件名 aaa.txt
On Error Resume Next
Dim i As Integer, J As Integer
i Len(FilePathFileName)
J InStrRev(FilePathFileName, "\")
GetFileName Mid(FilePathFileName, J + 1, i)
End Function
''获取路径路径 c:\dir1001\
Public Function GetFilePath(FilePathFileName As String) As String '获取路径路径 c:\dir1001\
On Error Resume Next
Dim J As Integer
J InStrRev(FilePathFileName, "\")
GetFilePath Mid(FilePathFileName, 1, J)
End Function
'获取文件名但不包括扩展名 aaa
Public Function GetFileNameNoExt(FilePathFileName As String) As String '获取文件名但不包括扩展名 aaa
On Error Resume Next
Dim i As Integer, J As Integer, k As Integer
i Len(FilePathFileName)
J InStrRev(FilePathFileName, "\")
k InStrRev(FilePathFileName, ".")
If k 0 Then
GetFileNameNoExt Mid(FilePathFileName, J + 1, i - J)
Else
GetFileNameNoExt Mid(FilePathFileName, J + 1, k - J - 1)
End If
End Function
'===== '获取扩展名 .txt
Public Function GetFileExtName(FilePathFileName As String) As String '获取扩展名 .txt
On Error Resume Next
Dim i As Integer, J As Integer
i Len(FilePathFileName)
J InStrRev(FilePathFileName, ".")
If J 0 Then
GetFileExtName ".txt"
Else
GetFileExtName Mid(FilePathFileName, J, i)
End If
End Function
使用DOS命令就可以完成:DIR D:\文件\ * TXT / S / / B D:\ 1.txt文件。使所有的TXT集成到1.txt文件的文件名。