Printing Crystal Report in loop

  private void btnGenerate_Click(object sender, EventArgs e) {

    try
    {
        axCrystalActiveXReportViewer1.ReportSource = null;

        ReportDocument cryRpt = new ReportDocument();
        TableLogOnInfos crtableLogoninfos = new TableLogOnInfos();
        TableLogOnInfo crtableLogoninfo = new TableLogOnInfo();
        ConnectionInfo crConnectionInfo = new ConnectionInfo();
        Tables CrTables;


        crConnectionInfo.ServerName = Configuration.ServerName;
        crConnectionInfo.DatabaseName = Configuration.DataBaseName;
        crConnectionInfo.UserID = Configuration.Server_userName;
        crConnectionInfo.Password = Configuration.Server_password;



        CrTables = cryRpt.Database.Tables;
        foreach (CrystalDecisions.CrystalReports.Engine.Table CrTable in CrTables)
        {
            crtableLogoninfo = CrTable.LogOnInfo;
            crtableLogoninfo.ConnectionInfo = crConnectionInfo;
            CrTable.ApplyLogOnInfo(crtableLogoninfo);
        }

       for(int i=0; i<=x; i++)
        {
            DataSet ds_ViewTermMarkSheet = new DataSet();
            Hashtable htViewTermMarkSheet = new Hashtable();

            htViewTermMarkSheet.Add("@Year", txtYear.Text);
            htViewTermMarkSheet.Add("@Faculty", cboFaculty.Text);
            htViewTermMarkSheet.Add("@Level", cboClass.Text);
            htViewTermMarkSheet.Add("@Section", cboSection.Text);
            htViewTermMarkSheet.Add("@term", cboTerm.Text);
            htViewTermMarkSheet.Add("@CRN",.ToString());

            DbOperations _dbAccess = new DbOperations();
            _dbAccess.selectStoredProcedure(ds_ViewTermMarkSheet, "spSelectExamView_Exam_TermWiseMarkSheet", htViewTermMarkSheet, "Marks");





        cryRpt.SetDataSource(ds_ViewTermMarkSheet.Tables["Marks"]);
       }



            axCrystalActiveXReportViewer1.Refresh();


        cryRpt.Close();

    }
    catch (Exception ex)
    {
        MessageBox.Show("Mark Sheet generation was not successful.\r" + ex.Message, "Error!");
    }
}