Auto-suggestion editor

using System;
using System.Collections.Generic;
using System.Linq;
using EPiServer.ServiceLocation;
using EPiServer.Shell.ObjectEditing;

namespace EPiServer.Samples {
  [ServiceConfiguration(typeof (ISelectionQuery))]
  public class MySelectionQuery: ISelectionQuery {
    SelectItem[] _items;
    public MySelectionQuery() {
      _items = new SelectItem[] {
        new SelectItem() {
            Text = String.Empty, Value = String.Empty
          },
          new SelectItem() {
            Text = "Alternative1", Value = "1"
          },
          new SelectItem() {
            Text = "Alternative 2", Value = "2"
          }
      };
    }
    //Will be called when the editor types something in the selection editor.
    public IEnumerable<ISelectItem> GetItems(string query) {
      return _items.Where(i => i.Text.StartsWith(query, StringComparison.OrdinalIgnoreCase));
    }
    //Will be called when initializing an editor with an existing value to get the corresponding text representation.
    public ISelectItem GetItemByValue(string value) {
      return _items.FirstOrDefault(i => i.Value.Equals(value));
    }
  }
}

[AutoSuggestSelection(typeof (MySelectionQuery))]
public virtual string SelectionEditor1 {
  get;
  set;
}

[AutoSuggestSelection(typeof (MySelectionQuery), AllowCustomValues = true)]
public virtual string SelectionEditor2 {
  get;
  set;
}