Updating framework

A check box for every course in the database is displayed, and the ones that the instructor is currently assigned to are selected.

The user can select or clear check boxes to change course assignments.

id) [Http Post, Action Name("Edit")] [Validate Anti Forgery Token] public Action Result Edit Post(int?

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When you edit an instructor record, you want to be able to update the instructor's office assignment. Now you'll enhance the Instructor Edit page by adding the ability to change course assignments using a group of check boxes, as shown in the following screen shot: The relationship between the navigation property.

The Run the page (select the Instructors tab and then click Edit on an instructor). The UI that enables you to change which courses an instructor is assigned to is a group of check boxes.

For most relationships, this can be done by updating either foreign key fields or navigation properties.

For many-to-many relationships, the Entity Framework doesn't expose the join table directly, so you add and remove entities to and from the appropriate navigation properties.

For Course entities the scaffolder does include an text box for the attribute means the user should be able enter the primary key value.

But it doesn't understand that because the number is meaningful you want to see it in the other views, so you need to add it manually.The Contoso University sample web application demonstrates how to create ASP.NET MVC 5 applications using the Entity Framework 6 Code First and Visual Studio 2013.If the number of courses were much greater, you would probably want to use a different method of presenting the data in the view, but you'd use the same method of manipulating navigation properties in order to create or delete relationships.To provide data to the view for the list of check boxes, you'll use a view model class.The Course views are already scaffolded with drop-down lists for the department field, but you don't want the Department ID caption for this field, so make the following highlighted change to the .

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