formcollection only holds the selected html.listbox items values? MVC

Question

My scenario is this: I have two listbox\'s, one that contains all my database items, and an empty one. The user adds the items needed from the full listbox to the empty list

Answer 1

Because it's just selectbox. You cannot post all values in selectbox. You have to use javascript to catch added items and store them in hidden input.

Un-tested code, but i think it help you.

<%= Html.Hidden("hdSelectedItems") %>
<%= Html.ListBox("AllItems", Model.Items)%>
<%= Html.ListBox("lbSelectedItems") %>
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