How does a multiple select list work with model binding in ASP.NET MVC?

Question

If you have a select list set to multiple in ASP.NET MVC, how does the modelbinding work?

What does it return for your selected items, an array?

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Answer 1

Yes, by default a multiselectlist will post through an array of the selected values.

This article has further information, including how to use strongly-typed views with a multiselectlist.

From the linked "article":

• Your model or view model class needs a collection property for the IDs for the selected option items, e.g. List ToppingIds.
• In the controller action method to which the form containing your multi-select-list POSTs, you can access the selected option items thru the collection property you added to the model or view model class.