Support persistent data storage

joeldevlearning / wf-poll

A WinForms Poll App

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Support persistent data storage #9

Open joeldevlearning opened 7 years ago

joeldevlearning commented 7 years ago

If using a backing file, users should have the option of saving their data and reloading on the next instance.

Persistence can just the basics and not involve UI changes:

a flag must be set for persistence to be supported (i.e. don't overwrite a file)
the program will check for filetype matching the type of storage; if not found, it will skip this step
the storage type must NOT be in-memory; anything else

joeldevlearning commented 7 years ago

Hold off on this until new backends (#7) are added. Consider having persistent storage implement a new interface, IPersistantStorage, to complement the more basic IStorage.