将数据库中数据绑定到TREEVIEW

public    DataSet    ds=null;   
   private    void    Load(object    sender,    System.EventArgs    e)   
   {   
   //    定义数据库连接   
   SqlConnection    CN    =    new    SqlConnection();   
   try     
   {   
   //初始化连接字符串   
   CN.ConnectionString=    "data    source=pmserver;initial    catalog=Benchmark;persist    security    info=False;user    id=sa;Password=sa;";   
   CN.Open();   
    
   SqlDataAdapter    adp    =    new    SqlDataAdapter("select    *    from    tbTree",CN);   
     ds=new    DataSet();   
   adp.Fill(ds);   
    
   }   
   catch    (Exception    ex)   
   {   
   throw    ex;   
   }   
   finally     
   {   
   CN.Close();   
   }   
   //调用递归函数，完成树形结构的生成   
   AddTree(0,    (TreeNode)null);   
   }   
    
   //    递归添加树的节点   
   public    void    AddTree(int    ParentID,TreeNode    pNode)