Create subdirectory in Sql Server FileTable

Question

I have a simple script that creates subdirectory in FileTable:

INSERT INTO MyFiles (name, is_directory)    
VALUES ('SomeFolder', 1, 0)

It works corrrect and if I run it SqlServer creates subdirectory 'SomeFolder'. But if I try to create nested subfolder I face with an error:

INSERT INTO MyFiles (name, is_directory)    
VALUES ('FirstLevel\SecondLevel', 1)

Error message is: An invalid filename, 'FirstLevel\\SecondLevel', caused a FileTable check constraint error. Use a valid Windows filename An invalid filename, 'FirstLevel\\SecondLevel', caused a FileTable check constraint error. Use a valid Windows filename .

As I know I must add parent_path_locator column for parent folder, for instance:

INSERT INTO MyFiles (name, is_directory, parent_path_locator)   
VALUES ('SecondLevel', 1, pathLocatorForFirstLevel)

But I have not pathLocatorForFirstLevel cause FirstLevel is not created yet. Maybe anyone know how to create subfolder with arbitrary name?

Answer 1

Using some C# code, the folder can be quickly verified and created if it does not exist.

using System.IO;            
DirectoryInfo di = Directory.CreateDirectory(FileServerPath + @"\" + 'FirstLevel\SecondLevel');