var report1 = new reportViewer1();
            var objectDataSource1 = new Telerik.Reporting.ObjectDataSource();
            objectDataSource1.DataSource = classes.Stu;
            report1.DataSource = objectDataSource1;
            Telerik.Reporting.ReportParameter reportParameter1 = new Telerik.Reporting.ReportParameter();
            reportParameter1.Name = "yearParam";
            reportParameter1.Text = "Enter Value for year";
            reportParameter1.Type = Telerik.Reporting.ReportParameterType.String;
            reportParameter1.AllowBlank = false;
            reportParameter1.AllowNull = false;
            reportParameter1.Value = cvyear.ToString();
            reportParameter1.Visible = true;

            
            reportParameter1.AvailableValues.DataSource = objectDataSource1;
            reportParameter1.AvailableValues.ValueMember = "= Fields.Anno";
  
            Telerik.Reporting.Filter filter1 = new Telerik.Reporting.Filter();
            filter1.Expression = "= Fields.Anno";
            filter1.Operator = Telerik.Reporting.FilterOperator.Equal;
            filter1.Value = "= Parameters.yearParam.Value";

            Telerik.Reporting.InstanceReportSource reportSource = new Telerik.Reporting.InstanceReportSource();
            reportSource.ReportDocument = report1;
            reportViewer1.ReportSource = reportSource;
            reportViewer1.RefreshReport();