Recursively get all files and folders under the specified drive letter

<summary>
Recursively get all files and folders under the specified drive letter
There is a partial folder access permission issue
</summary>
<param name= "path" >string path = @ "G:\"; </param>
<param name= "Filter" >string filter = "*.mp3";</param>

2. private static void Parsedirectory (string path, String filter)
4. {
6. Get all folder paths under directory
8. string[] dirs = directory.getdirectories (path);
10. if (dirs. Length = = 0)
12. Return
14. IEnumerator iter = dirs. GetEnumerator ();
16. Traverse folder path and file name under current path
18. while (ITER. MoveNext ())
20. {
22. String str = (string) (ITER. Current);
24. Parsedirectory (str, filter);
26. }
30. Gets the specified content in the specified folder
32. string[] files = directory.getfiles (path, filter);
34. if (Files. Length > 0)
36. {
38. M_pathlist.add (files);
40. }
42. }

  recursion (recursion): Programming skills that the program calls itself.

Recursion satisfies 2 conditions:

1) There is a process of repeated execution (call itself)

2) There are conditions for jumping out of the iterative process (recursive exit)

Recursively get all files and folders under the specified drive letter