求助 水晶报表导出PDF或Word文档遇到问题

我的水晶报表加入下面这句之后，预览正常但是导出PDF或Word文档时就全是空白,应该是和Session["T_No"]有关，但是这个翻页时是要用的。还请大家帮帮忙，谢谢！
<sessionState mode= "StateServer" stateConnectionString= "tcpip=127.0.0.1:42424" sqlConnectionString= "data 
source=127.0.0.1;Trusted_Connection=yes" cookieless= "false"  timeout= "7200"/>--代码--using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.OleDb;
using CrystalDecisions.Shared;
using CrystalDecisions.CrystalReports.Engine;namespace PWMS.front
{
    public partial class print_crystal : System.Web.UI.Page
    {
        protected void Page_Init(object sender, EventArgs e)
        {
            if (Session["T_No"] != null)
            {
                CrystalReportViewer1.ReportSource = (ReportDocument)Session["T_No"];
            }
        }
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
               Report_bind();            }
        }
        private void Report_bind()
        {
            using (OleDbConnection con = new OleDbConnection(System.Configuration.ConfigurationManager.AppSettings["connStr"]))
            {
                
OleDbDataAdapter da = new OleDbDataAdapter();
                
                da = new OleDbDataAdapter("select Cust_Nm, SN_No, Contract_No, from dbo.Print_Save where T_No = '" + Server.UrlDecode(Request.QueryString["T_No"]) + "'", con);
                
                DataSet dt1 = new DataSet();
                
                da.Fill(dt1, "myTable");                ReportDocument myReport = new ReportDocument();
                string reportPath = Server.MapPath(@"pack_list.rpt");
                myReport.Load(reportPath);                
                myReport.SetDataSource(dt1.Tables[0].DefaultView);
                
                CrystalReportViewer1.ReportSource = myReport;                Session["T_No"] = myReport;            }
        }
    }
}