or
Filter filter1 = new Filter();filter1.Expression = "=Fields.DAYNUMBER";filter1.Operator = FilterOperator.TopN;filter1.Value = "1";this.table2.RowGroups[0].ChildGroups[1].Filters.Add(filter1);Dim report1 As New myReports.ProjectListDim tbl As DataTable = db.ExecuteDataTable("SELECT * FROM mydata WHERE ProgramID = " & nProgramID)report1.DataSource = tblReportViewer1.Report = report1Dim report1 As New myReports.ProjectListDim tbl As DataTable = db.ExecuteDataTable("SELECT * FROM mydata WHERE ProgramID = " & nProgramID)report1.DataSource = tblDim instanceReportSource As New Telerik.Reporting.InstanceReportSource()instanceReportSource.ReportDocument = report1ReportViewer1.ReportSource = instanceReportSource