c# app telerik reportViewer, ReportSource, Report class with ReportParameters

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using HO.MCAA.GHD.Model;
using HO.MCAA.GHD.Controls;
using HO.MCAA.GHD.Reports;
using HiimelOyun.App.Lib.Settings;
using System.Collections;

namespace HO.MCAA.GHD.Jagsaalt
{
    public partial class frmProductRequestReportViewer : Form
    {
        public ProductRequestHeaderInfo DataHeader { get; set; }

        public frmProductRequestReportViewer()
        {
            InitializeComponent();
        }

        protected override void OnLoad(EventArgs e)
        {
            base.OnLoad(e);
        }

        protected override void OnClosing(CancelEventArgs e)
        {
            //this.reportViewer.Report.Dispose();
            this.reportViewer1.Dispose();

            base.OnClosing(e);
        }

        private void frmProductRequestReportViewer_Load(object sender, EventArgs e)
        {
            ProductRequestReport report = new ProductRequestReport();
            Hashtable setting = FormSettingManager.loadSetting(FormSettingManager.GetFilename("frmSetting"));
            try
            {
                report.DataSource = DataHeader.ProductRequestDetails.ToList();
               
                string parDate = DataHeader.RequestDate.Year + " оны " + DataHeader.RequestDate.Month
                    + " -р сарын " + DataHeader.RequestDate.Day + " -ны өдөр";
                string parCentre = (setting["Setting_CentreName"] + string.Empty).ToString();
                string parCode = (setting["Setting_CentreCode"] + string.Empty).ToString();

                //report.ReportParameters["ParDate"].Text;
                report.ReportParameters["ParDate"].Value = parDate;
                report.ReportParameters["ParCentre"].Value = parCentre;
                report.ReportParameters["ParCode"].Value = parCode;
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "Алдаа", MessageBoxButtons.OK, MessageBoxIcon.Error);
                this.Close();
            }
            try
            {
                string companyLogo32 = (setting["Setting_CompanyLogo48"] + string.Empty).ToString();
                report.LogoBox.Style.BackgroundImage.ImageData = new Bitmap(companyLogo32);
            }
            catch { }


            // perform additional operations on the report object if needed          
            Telerik.Reporting.InstanceReportSource instanceReportSource = new Telerik.Reporting.InstanceReportSource();
            instanceReportSource.ReportDocument = report;
            this.reportViewer1.ReportSource = instanceReportSource;
            //this.reportViewer1.Report = report;
            this.reportViewer1.RefreshReport();
        }
    }
}