CODEWITHSUNDEEP
c#asp.net-mvc-5model-binding
jmoreno
jmoreno

Reputation: 13561

MVC5 model binding -- child objects all null

When my parent class/model is posted back to the server and I use the BindAttribute "Bind", child objects are all null.

If I don't include the binding, then it works
public ActionResult SaveEdit(int id, Person person)

For instance the person.Address property is not null, and it's properties are set based upon the form submission.

Just FYI, Address is created in the view using a EditorFor, everything is included in the request form.

But if I use Bind, it doesn't work..

public ActionResult SaveEdit(int id, [Bind(Include = "PersonId, AddressId, Address.AddressId, Address.Line1, Address.City, Address.State, Address.Zip")] Person person)

person.PersonId and person.AddressId are set correctly, but person.Address is null.

If use Bind and multiple parameters, like so...

    public ActionResult SaveEdit(int id, [Bind(Include = "PersonId")] Person person, 
       [Bind(Prefix = "Address", Include = "AddressId, Line1, City, State, Zip")] Address address)

It halfway works, both object are created, neither has related properties that would normally be there.

Is this normal behavior, or have I done something wrong?

Upvotes: 2

Views: 2121

Answers (1)

user3559349
user3559349

Reputation:

You have not shown your model, but assuming it contains properties PersonId, AddressId and Address where Address is a complex object then it needs to be

public ActionResult SaveEdit(int id, [Bind(Include = "PersonId, AddressId, Address")] Person person)

However, the better approach is to use a view model containing only those properties you are editing and avoid the use of [Bind(Include = "properties, list")]

Upvotes: 4

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