Images are stored as byte arrays in database blob fields. So here is a Google Search with Code first & DB first (not knowing which EF approach you are using) solutions: working with blobs in entity framework - Google Search
]. One of these should suit your requirements.
here is a two-part video tutorial of ASP.NET uploading, Saving, and loading Images to/from DB (from above Google Search):
* part 1 - Save image to database using asp net - YouTube
* Part 2 - Load image from database in asp net - YouTube