title: How can I add default value to a RadComboBox?
body: <p>I am trying to add an extra item to my WCF service. Here is my code. I have a code which gets the values from the database. I would like to add default item 'All' to array. Here is my WCF code. </p>
  
  <pre><code>RadComboBoxData result = new RadComboBoxData();
  var listView = new listTypedView();
  
  //In case the user typed something - filter the result set
  string text = String.Concat("%", context.Text, "%");
  if (!String.IsNullOrEmpty(text))
  {
      using (DataAccessAdapter adapter = LLBLGenAdapterUtility.GetAdapter())
      {
          RelationPredicateBucket filter = new RelationPredicateBucket();
          filter.PredicateExpression.Add(ViewNameFields.Name % text);
          adapter.FetchTypedView(personView.GetFieldsInfo(), listView, filter, 0, null, false);
      }
  }
  
  var allList = from n in listView
                    select new RadComboBoxItemData
                    {
                        Text = n.pName,
                        Value = n.Id.ToString()
                    };
  result.Items = allList.ToArray();
  </code></pre>