Calling UpdateModel with a collection of complex data types reset all non-bound values?

Question

I\'m not sure if this is a bug in the DefaultModelBinder class or what. But UpdateModel usually doesn\'t change any values of the model except the ones it found a match for.

Answer 1

You just gave me an idea to dig into ASP.NET MVC 2 source code. I have been struggling with this for two weeks now. I found out that your solution will not work with nested lists. I put a breakpoint in the UpdateCollection method ,and it never gets hit. It seems like the root level of model needs to be a list for this method to be called

This is in short the model I have..I also have one more level of generic lists, but this is just a quick sample..

public class Borrowers
{
   public string FirstName{get;set;}
   public string LastName{get;set;}
   public List
 Addresses{get;set;}
}

I guess that, I will need to dig deeper to find out what is going on.

UPDATE: The UpdateCollection still gets called in asp.net mvc 2, but the problem with the fix above is related to this HERE