We are trying to use the built-in DotNetNuke List functionality to populate a State Drop-Down list in an information request module. We get the list populated and the functionality appears to be fine until the postback that saves the data to the table.

At that point, the dropdown list control is empty. The selectedindex property of the ddlState control is -1 and the SelectedValue is blank.

The problem appears to be a state issue where the values of the dropdown control are not passed back (or possibly not actually set by the control).

Anyone have any similar problems or suggestions...Don't want to have to provide a state table when the list already exists in DNN...(but the DropDownList bound to the States Table via a SQL Query works!!)

Here is the code used to load and bind to the ddl control:

Within the html Table on the ascx form, here is the row that contains the drop down control:

<tr valign="top">

Module Level assignment:

In the Page_Load method, inside of a If Not Page.IsPostBack statement I have the following code:

The ddlState control has EnableViewState to TRUE in the ascx code...

The States appears, including the Select State, which is the first item in the list. I can select the state in the dropdownlist, and all appears to be fine.

However, when I try to pull the data from the form field TextBox and DDL controls, the ddlState is completely empty. No DataSource, no DataValueField, no DataTextField, nothing...The SelectedListIndex is -1 (Not zero, which is is when the page displays). I'm completely baffled...

David - empty drop down lists on postback are generally one of these things;
1.  no viewstate either on control, container or page level

2. databind event somewhere in the pageload functionality (databinding actions should run under a 'if not isPostback' condition)

3. Logic somewhere in your postback code that is clearing the list incorrectly

I doubt it has anything in particular to do with using the DNN list functionality, because it doesn't look at the postback status of a page.