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POASP.Net MVC - model with collection not populating on postback
 

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    <p>I have an ASP.Net MVC application with a model which is several layers deep containing a collection. </p> <p>I believe that the view to create the objects is all set up correctly, but it just does not populate the collection within the model when I post the form to the server. </p> <p>I have a piece of data which is found in the class hierarchy thus: </p> <pre><code>person.PersonDetails.ContactInformation[0].Data; </code></pre> <p>This class structure is created by LinqToSQL, and ContactInformation is of type <code>EntitySet&lt;ContactData&gt;</code>. To create the view I pass the following: </p> <pre><code>return View(person); </code></pre> <p>and within the view I have a form which contains a single text box with a name associated to the above mentioned field: </p> <pre><code>&lt;%= Html.TextBox("person.PersonDetails.ContactInformation[0].Data")%&gt; </code></pre> <p>The post method within my controller is then as follows: </p> <pre><code>[AcceptVerbs(HttpVerbs.Post)] public ActionResult Create (Person person) { //Do stuff to validate and add to the database } </code></pre> <p>It is at this point where I get lost as person.PersonDetails.ContactInformation.Count() ==0. So the ModelBinder has created a ContactInformation object but not populated it with the object which it should hold (i.e ContactData) at index 0.</p> <p>My question is two fold: 1. Have I taken the correct approach.. i.e. should this work? 2. Any ideas as to why it might be failing to populate the ContactInformation object?</p> <p>Many thanks, Richard</p>
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