rptViewer.ShowCredentialPrompts = false;

            rptViewer.ProcessingMode = Microsoft.Reporting.WebForms.ProcessingMode.Remote;

            rptViewer.ServerReport.ReportServerCredentials = new ReportCredentials("spsqlrptadmin", "AbcD123", "US");

            rptViewer.ServerReport.ReportServerUrl = new Uri("http://WIN12ABC/ReportServer_ABCD1dev");

            rptViewer.ServerReport.ReportPath = "/SSRSDemo/SSRSDemo";

            List<ReportParameter> parameters = new List<ReportParameter>();

            parameters.Add(new ReportParameter("ID_Number", "86745"));

           rptViewer.ShowParameterPrompts = false;

            rptViewer.ShowPromptAreaButton = false;

            rptViewer.ServerReport.SetParameters(parameters);

            rptViewer.ServerReport.Refresh();