ReportParameterCollection reportparameter = new ReportParameterCollection();
reportparameter.Add(new ReportParameter("productType", Globalvariables.username.ToString()));
reportparameter.Add(new ReportParameter("customername", Globalvariables.username.ToString()));
reportparameter.Add(new ReportParameter("customeraddress", Globalvariables.username.ToString()));
this.ReportViewer1.LocalReport.SetParameters(reportparameter);
this.ReportViewer1.LocalReport.Refresh();