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.

What should be done if the model state is not valid in the post handler?

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When should the update method be used directly instead of retrieving the book from the database?

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What are the next steps after implementing the upsert get and post handlers?

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