Hello,

I'm testing some concepts in ASP.NET MVC multisteps (Style Wizards) with a small application which allow me to records organizations in a database.

To make things easier, I've a class OrganizationFormModelView that contains an object of class Organization and a property called ParentOrgList of SelectList type. The only purpose of the selectList property is to be used by a DropDownList.

I've also serialize OrganizationFormModelView to get the multisteps Wizard effect.

In my first view (or first step), I use a dropdownlist helper to assign a value to one of the the Organization's property called ParentOrganization, which draws data from the ParentOrgList.

...
<% = Html.DropDownList("Organization.ParentOrganization", Model.ParentOrgList)%>
... 

The first time the page loads, I'm able to make a choice. And, my choice is reflected in my object Model all along the wizard' steps(see Visual studio in debugging mode).

But, when any time I'm redirected back to the first view (first step), I get the following error message:

"The ViewData item with the key 'Organization.ParentOrganization' is of type 'System.String' but needs to be of type 'IEnumerable'."

Thanks for helping