In this article we will see 2 functionalities.
1. Create a table that contain Blob field which will store the file content.
2.Create a Page and add an action for Import File and Export File to Upload and download it.
3. Create functions for upload and download file.
4. Call these functions on OnAction trigger.
Now we will see that how it work.
We will import 3 types of files: text, pdf and jpg.
Now we will export these files and we can download them.
So using InStream and OutStream we can upload and download file in Business Central.