问题
I am using visual basic and I want to count all the files that exist in a folder and in its subfolders.. I tried this :
Dim counter = My.Computer.FileSystem.GetFiles("C:\Folder")
MsgBox("number of files is " & CStr(counter.Count))
but it only counts files in the C:\Folder and not in C:\Folder\Sub-Folder\AnotherSubFolder What should I do? Thank's for help!
回答1:
Use Directory.GetFiles() as defined here: https://msdn.microsoft.com/en-us/library/ms143316(v=vs.110).aspx
So you'd just use
Dim counter As Integer = Directory.GetFiles(someString, "*.*", SearchOption.AllDirectories).Length;
MsgBox("Number of files is : " + counter)
someString being the top-level directory you want to start at
"*.*" being the search pattern you want to match. This gets all files. If you wanted only text files, for example, you could do "*.txt".
SearchOption enum has two options: AllDirectories or TopDirectoryOnly if you're only interested in the exact directory passed, obviously.
来源：https://stackoverflow.com/questions/32277848/counting-all-files-in-folder-and-subfolder