DropDownList绑定ArrayList

namespace CDR.components
{

 public enum AgentLevel
 {
  K,
  A,
  B,
  C
 }

 public class Agent
 {
  public AgentLevel Level
  {
   get{return _level;}
  }
  public string Name
  {
   get{return _name;}
  }
  
  private AgentLevel _level;
  private string _name;
  
  public Agent(AgentLevel l,string n)
  {
   _level = l;
   _name  = n;
  }
 }

 /// <summary>
 /// AgentLevels 的摘要说明。
 /// </summary>
 public class AgentLevels
 {
  public static ArrayList Levels = new ArrayList();
  
  static AgentLevels()
  {
   Levels.Add(new Agent(AgentLevel.K,"最终客户"));
   Levels.Add(new Agent(AgentLevel.C,"三级代理"));
   Levels.Add(new Agent(AgentLevel.B,"二级代理"));
   Levels.Add(new Agent(AgentLevel.A,"一级代理"));
  }
 }
}

  private void BindAgentLevels(DropDownList ddl)
  {
   try
   {
    ddl.DataSource = AgentLevels.Levels;
    ddl.DataTextField = "Name";
    ddl.DataValueField = "Level";
    ddl.DataBind();
   }
   catch
   {}
  }