DAL 数据访问层代码：
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//绑定IDList,显示所有人员列表
  public DataSet SelectIDListAll()
  {
       string Str = "select p_number,p_name from t_people";
       DataSet ds = new DataSet();

       myCon = new SqlConnection(DAL.DALConfig.ConnectionString);
       try
       {
        SqlDataAdapter mycomm = new SqlDataAdapter(Str,myCon);
        mycomm.Fill(ds,"t_people");   
               
        return ds;
       }
       catch(Exception exc)
       {
        throw exc;
       }
  }

BLL业务层代码：
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//绑定IDList,显示所有人员列表
  public ArrayList  SelectIDListAll()
  {
       DAL.TPeopleDao peopledao = new TPeopleDao();
       DataSet ds = new DataSet();
       ds = peopledao.SelectIDListAll();

       // Creates and initializes a new ArrayList.
       ArrayList myAL = new ArrayList();
       for(int i=0;i<ds.Tables[0].Rows.Count;i++)
       {
        myAL.Add(ds.Tables[0].Rows[i][0].ToString() + " " +ds.Tables[0].Rows[i][1].ToString() );           
       }
       return myAL;
  }

页面层代码：
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//绑定IDList,显示所有人员列表
  private void SelectIDListAll()
  {
       Lab.BLL.TPeopleBiz peoplebiz = new TPeopleBiz();
       ArrayList myAL = peoplebiz.SelectIDListAll();
       this.P_IDlist.Items.Clear();

       for(int i = 0 ;i<myAL.Count;i++)
       {
        this.P_IDlist.Items.Add(myAL[i]);
       }

  }