asp.net mvc default model binder for model that has inheritance

Question

I have a form that I binding to that has the following structure:

public class Status
{
   public List<ABCAttachment> ABCAttachments_Files { get; set; }
}

public class Attachment
{
  public string Id { get; set; }
}

public class ABCAttachment : Attachment
{
   string Name { get; set; }
}

My action looks like this:

public ActionResult SaveAttachment(Status status)
{
  ....
}

The data is coming over in the form

ABCAttachments_Files[0].Id="0", ABCAttachments_Files[0].Name="test"

When I access status in my SaveAttachments action the Id is there, but the Name is not. I see it correctly being posted, but why is it not binding properly?

Are you sure the ID is there? Technically, in your example, it is default(int), and could thus be uninitialized. :) — bzlm
– bzlm, Commented Dec 31, 2010 at 13:47

amurra · Accepted Answer · 2013-01-10 18:39:51Z

1

Looks like the Name property needs to be public or it won't be bounded to:

public class ABCAttachment : Attachment
{
   string Name { get; set; }
}

should be

public class ABCAttachment : Attachment
{
   public string Name { get; set; }
}

edited Jan 10, 2013 at 18:39

answered Dec 31, 2010 at 16:15

amurra

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