The Complete Guide to ASP.NET Core MVC (.NET 5) - Upsert Page Handlers

The video tutorial explains how to create an 'upsert' page that combines the functionality of both create and edit views in a web application. It guides through copying and modifying existing views, handling create and update operations, and using database retrieval methods. The tutorial also covers the logic for post handlers, including model state validation and updating book properties.

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