Hello,

1)Let's say I've this form:

<%Using(Html.BeginForm()){%>
 <% = Html.Hidden("myObject", 
                   (cast to the appropriate type)ViewData["KeyForMyObject"]%>     
 <input type = "submit" "Submit Object">
<%}%>

2) Here's the Action which's supposed to intercept the value of the object

public ActionResult MyAction(Type myObject)
{
  //Do Something with the object 
}

Here's my question: What type of objects the Hidden field can support?

In fact, when ViewData["KeyForMyObject"] contains a string, int, or bool, myAction is able to retrieve the value.

But, when it comes to objects, such as List, and dictionary, nothing happens. When I debug to check the local values, I see null for Type myObject in the MyMethod.

So what are the rules in MVC when it comes to a List or Dictionary?

================================= EDIT

To make things simpler, can I write something like this

<% = Html.Hidden("contactDic", (Dictionary<string, string>) ViewData["contacts"])%>

and expect to retrieve the dictionary in the action Method like this

public ActionResult myMethod(Dictionary<string, string> contactDic)
{
  //Do something with the dictionary
}

Thanks for Helping