方法：  

public DataSet GetAllMenu()
  {
   //ManagerMenu.aspx
   //get all menu info
   DataSet ds = new DataSet();
   //选取用户的所有权限菜单
   string str00="select * from quan_menut order by menu_type,menu_seq";
   OracleDataAdapter da = new OracleDataAdapter(str00,MyConnection);
   da.Fill(ds,"tree");
   return ds;
  }

页面

  private void Page_Load(object sender, System.EventArgs e)
  {
   // 在此处放置用户代码以初始化页面
   CreateDataSet();
   InitTree(TreeViewMenu.Nodes,"0");
  }

  //取数据到TreeView控件中
  //建立数据集
  private DataSet CreateDataSet()
  {
//   string cmdSelect="select * from quan_menut order by menu_type,menu_seq";
//   OracleDataAdapter myCmd=new OracleDataAdapter(cmdSelect,MyConnection);
//   ds=new DataSet();
//   myCmd.Fill(ds,"tree");
//   return ds;

   DataSelectStr DSTR = new DataSelectStr();
   ds = DSTR.GetAllMenu();
   return ds;
  }
  //建树的基本思路是：从根节点开始递归调用显示子树
  private void InitTree(TreeNodeCollection Nds,string parentId)
  {
   DataView dv=new DataView();
   TreeNode tmpNd;
   string intId;
   dv.Table=ds.Tables["tree"];
   dv.RowFilter="menu_parentid="+parentId+"" ;
   foreach(DataRowView drv in dv)
   {
    tmpNd=new TreeNode();
    tmpNd.ID=drv["menu_noteid"].ToString();
    tmpNd.Text=drv["menu_noteid_name"].ToString();
//    tmpNd.ImageUrl="../images/"+drv["Icon"].ToString();
//    tmpNd.NavigateUrl="../"+drv["Address"].ToString();
    Nds.Add(tmpNd);
    intId=drv["menu_parentid"].ToString();
    InitTree(tmpNd.Nodes,tmpNd.ID);
   }
  }

/

/

  private void Page_Load(object sender, System.EventArgs e)
  {
   if(!IsPostBack)
   {
    // 在此处放置用户代码以初始化页面
    CreateDataSet();
    InitTree(TreeViewMenu.Nodes,"0");
    BindGrid();
   }
  }

  private void CreateDataSet()
  {   
   DataAccess.Database data = new DataAccess.Database();
   OracleDataReader dataReader;
   string userid = "1418";
   string groupid ="1";
   OracleParameter[] param = {            
            data.MakeInParam("userid",OracleType.VarChar,8,userid),
            data.MakeInParam("groupid",OracleType.VarChar,6,groupid),
            data.MakeOutParam("RetCursor",OracleType.Cursor,0)
           };
   data.RunProc("chmcoa_package_t.infousermenu",param,out dataReader);
   dataTbl1 = ConvertDataReaderToDataTable(dataReader);
   dataTbl1.TableName = "TreeView";  
  }

  #region 将DataReader 转为 DataTable
  ///


  /// 将DataReader 转为 DataTable
  ///
  /// DataReader
  public DataTable ConvertDataReaderToDataTable(OracleDataReader dataReader)
  {
   //WebUI.ClassFile.Database data = new WebUI.ClassFile.Database();
   DataTable datatable = new DataTable();
   DataTable schemaTable = dataReader.GetSchemaTable();
   //动态添加列
   foreach(DataRow myRow in schemaTable.Rows)
   {
    DataColumn myDataColumn = new DataColumn();
    myDataColumn.DataType = System.Type.GetType("System.String");
    myDataColumn.ColumnName = myRow[0].ToString();
    datatable.Columns.Add(myDataColumn);
   }
   //添加数据
   while(dataReader.Read())
   {
    DataRow myDataRow = datatable.NewRow();
    for(int i=0;i<schemaTable.Rows.Count;i++)
    {
     myDataRow[i] = dataReader[i].ToString();
    }
    datatable.Rows.Add(myDataRow);
    myDataRow = null;
   }
   schemaTable = null;
   dataReader.Close();
   return datatable;
  }
  #endregion

  private void InitTree(TreeNodeCollection Nds,string parentId)
  {
   DataView dv=new DataView();
   TreeNode tmpNd;
   string intId;
   dv = dataTbl1.Copy().DefaultView;
   dv.RowFilter="menu_parentid="+parentId+"" ;
   foreach(DataRowView drv in dv)
   {
    tmpNd=new TreeNode();
    tmpNd.ID=drv["menu_noteid"].ToString();
    tmpNd.Text=drv["menu_noteid_name"].ToString();
    //    tmpNd.ImageUrl="../images/"+drv["Icon"].ToString();
    //    tmpNd.NavigateUrl="../"+drv["prog_address"].ToString();
    Nds.Add(tmpNd);
    intId=drv["menu_parentid"].ToString();
    InitTree(tmpNd.Nodes,tmpNd.ID);
   }
  }