递归统计指定目录下所有文件容量总和

Public Class ShowDirSize
'递归统计指定目录下所有文件容量总和
Public Shared Function DirSize(ByVal d As IO.DirectoryInfo) As Long
Dim Size As Long = 0
' 统计本目录下所有文件容量总和
Dim fis As IO.FileInfo() = d.GetFiles()
Dim fi As IO.FileInfo
For Each fi In fis
Size += fi.Length
Next fi
' 递归统计所有子目录下所有文件容量总和
Dim dis As IO.DirectoryInfo() = d.GetDirectories()
Dim di As IO.DirectoryInfo
For Each di In dis
Size += DirSize(di)
Next di
Return Size
End Function
End Class

'调用代码
Dim dir As New System.IO.DirectoryInfo(TxtDir.Text)
TxtMessage.Text = ShowDirSize.DirSize(dir)