The tutorial series comprises 12 sections in total.
(A later tutorial shows how to handle concurrency conflicts, and if you only want individual fields to be updated in the database, you can set the entity to Unchanged and set individual fields to Modified.) As a best practice to prevent overposting, the fields that you want to be updateable by the Edit page are whitelisted in the parameters.
In the Details page you'll display the contents of the collection in an HTML table. id=1&Course ID=2021 The URLs are created by Action Link statements in the Razor view.
In the following code, the idparameter matches the default route, so id is added to the route data. The new code reads the existing entity and calls Try Update Model to update fields from user input in the posted form data.
This causes its entity state to automatically be changed to , the Entity Framework generates a SQL UPDATE statement that updates only the actual properties that you changed.
The disconnected nature of web apps doesn't allow for this continuous sequence.