MVC Action has missing data

Question

I send my viewmodel from my get action method to a view for update, the view has a submit button which takes returns control to the post action method. The viewmodel is of this form

public class MyViewModel
{
   public someObject a;
   public someOtherObject b;
}

Now, in the get method someOtherObject b has data in it, in the view it has data in it, but in the post method it is null. Why might this be?

Thanks,

Did you bind the property in your view? Can you post a part of your view? — Styxxy, Jun 12 '12 at 11:55
@Styxxy code posted - actually, I have another problem also. — Sachin Kainth, Jun 12 '12 at 12:19
How are you calling the action in the view? How are you passing the parameters? The code you have posted has strictly nothing to do with the model class you have shown. — Darin Dimitrov, Jun 12 '12 at 12:19

score 1 · Accepted Answer · answered Jun 12 '12 at 12:17

Without looking into it in too much detail, I'd take a guess at the problem being that your model has fields instead of properties. Try this instead:

public class MyViewModel
{
   public someObject a { get; set; }
   public someOtherObject b { get; set; }
}

The default MVC model binder examines your model for settable properties (hence the overridable SetProperty() method taking a PropertyDescriptor) and sets those values, so I'm guessing that fields are ignored.

Then do you need to update your question? Because on your question they're fields. — Steve Wilkes, Jun 12 '12 at 12:22

MVC Action has missing data

1 Answers1