InfoPath Dev

I am using an xml datasource to bind my infopath dropdown list to my list view with a custom column from a sharpoint list. I've manage to do it however I get "string;#" in front of the value in the dropdown list. e.g. string;#John Smith

 Any solutions? I just wanted to concat 2 columns (firs and last name) into the dopdown list.

thanks.

 Solved my own problem using the below code snippet:

             XPathNodeIterator contactList = DataSources["myDataSource"].CreateNavigator().Select("xmlPath", NamespaceManager);
           
             foreach (XPathNavigator contact in contactList)
            {
                string field = contact.SelectSingleNode("myFieldName", NamespaceManager).Value.Replace("string;#", "");
                contact.SelectSingleNode("myFieldName").SetValue(field);
            }

 I'm a bit new to InfoPath so can you explain where that code snippet goes? Thanks.