<SharePoint:FormField 
                    runat="server" 
                    ID="field_Domain" 
                    ControlMode="New" 
                    FieldName="Domain"/>

I want to fill the formfield above with data comming from an array of string.
The context: a list custom form (New), sharepoint 2010.

The control is part of the .ascx of a webpart used to create a list custom new form. The data processing is done in the code behind (.cs).