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27-Nov-2018 18:49

Note: The approach taken to edit instructor course data works well when there is a limited number of courses.

For collections that are much larger, a different UI and a different updating method would be required.

The Course Index page is displayed with the new course added to the list.

The department name in the Index page list comes from the navigation property, showing that the relationship was established correctly.

To provide data to the view for the list of check boxes, you'll use a view model class.

Create [Http Post] [Validate Anti Forgery Token] public Action Result Edit(int id, Form Collection form Collection, string[] selected Courses) private void Update Instructor Courses(string[] selected Courses, Instructor instructor To Update) The code then loops through all courses in the database and checks each course against the ones currently assigned to the instructor versus the ones that were selected in the view.

To facilitate efficient lookups, the latter two collections are stored in This code creates an HTML table that has three columns.

In each column is a check box followed by a caption that consists of the course number and title.

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.

To facilitate this, the scaffolded code includes controller methods and Create and Edit views that include a drop-down list for selecting the department.



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