asp.net gridview作分页显示时，有点有关问题，解决全给他分了

asp.net gridview作分页显示时，有点问题，解决全给他分了。
我在点1,2,3,4,5...下一页时，这些链接到前一页后一页的超链接数字没有了，很郁闷，不知道什么原因，帮看看吧，朋友。
主要在这里运行后，出问题:

C# code

        protected void myDataGrid_PageIndexChanging(object sender, GridViewPageEventArgs e)        {            this.myDataGrid.PageIndex = e.NewPageIndex;            startIndex = myDataGrid.PageSize * this.myDataGrid.PageIndex;            if(Session["RuleID"]!=null){                ruleID = (long)Session["RuleID"];            }            startTime = DateTime.Parse(txStartTime.Text);            endTime = DateTime.Parse(txEndTime.Text);            EQID = ddToolList.Text;            chamberID = lsChamberList.Text;            DataSet alarmDataDS = GetChamberAlarmData(ruleID, startIndex, pageSize, EQID, chamberID, startTime, endTime);            DataTable objTable = GetObjectTable(alarmDataDS);            myDataGrid.DataSource = objTable;            this.myDataGrid.DataBind();            for (int j = 0; j < myDataGrid.Rows.Count; j++)            {                myDataGrid.Rows[j].Cells[1].Text = string.Format("<a href='ByRaw.aspx?UpPage=RawData&RunID={0}'>{0}</a>", myDataGrid.Rows[j].Cells[1].Text); ;            }        }

如下代码也参考一下：
 public DataSet GetAlarmData(long ruleID,int startIndex,int pageSize, string EQID, string chamberID, DateTime SDT, DateTime EDT)
  {
  string sqlText = @"SELECT Q.RUNID,Q.QTY FROM (SELECT T.RUNID,COUNT(*) AS QTY FROM ALARMHIST T WHERE 
  T.RULEID=:RuleID 
  AND T.EQID=:EqID 
  AND T.CHAMBERID=:ChamberID
  AND T.DATETIME BETWEEN :StartT AND :EndT
  GROUP BY T.RUNID)Q
  ORDER BY Q.QTY DESC,Q.RUNID";
  OracleCommand cmd = new Oracle.DataAccess.Client.OracleCommand(sqlText, summaryConn);
  cmd.CommandType = System.Data.CommandType.Text;
  cmd.Parameters.Add(new Oracle.DataAccess.Client.OracleParameter { ParameterName = "RuleID", DbType = System.Data.DbType.Decimal });
  cmd.Parameters["RuleID"].Direction = System.Data.ParameterDirection.Input;
  cmd.Parameters["RuleID"].Value = ruleID;

  cmd.Parameters.Add(new Oracle.DataAccess.Client.OracleParameter { ParameterName = "EqID", DbType = System.Data.DbType.String });
  cmd.Parameters["EqID"].Direction = System.Data.ParameterDirection.Input;
  cmd.Parameters["EqID"].Value = EQID;

  cmd.Parameters.Add(new Oracle.DataAccess.Client.OracleParameter { ParameterName = "ChamberID", DbType = System.Data.DbType.String });
  cmd.Parameters["ChamberID"].Direction = System.Data.ParameterDirection.Input;
  cmd.Parameters["ChamberID"].Value = chamberID;

  cmd.Parameters.Add(new Oracle.DataAccess.Client.OracleParameter { ParameterName = "StartT", DbType = System.Data.DbType.DateTime });
  cmd.Parameters["StartT"].Direction = System.Data.ParameterDirection.Input;
  cmd.Parameters["StartT"].Value = SDT;

  cmd.Parameters.Add(new Oracle.DataAccess.Client.OracleParameter { ParameterName = "EndT", DbType = System.Data.DbType.DateTime });
  cmd.Parameters["EndT"].Direction = System.Data.ParameterDirection.Input;
  cmd.Parameters["EndT"].Value = EDT;
  DataSet ds;
  ds = new DataSet();
  OracleDataAdapter oraDataAdapter = new OracleDataAdapter(cmd);