public static void ModifyReport(Report report, string reportName, FeatureLayer featureLayer) { #region Rename Report //Note: Call within QueuedTask.Run() ReportProjectItem reportProjItem = Project.Current.GetItems <ReportProjectItem>().FirstOrDefault(item => item.Name.Equals(reportName)); reportProjItem.GetReport().SetName("RenamedReport"); #endregion #region Modify the Report datasource //Note: Call within QueuedTask.Run() //Remove Groups // The fields in the datasource used for the report var listFields = new List <string> { "STATE_NAME" }; report.RemoveGroups(listFields); //Add Group report.AddGroup("STATE_NAME", true, true, ""); //Modify the Definition Query var defQuery = "STATE_NAME LIKE 'C%'"; report.SetDefinitionQuery(defQuery); #endregion #region Modify the report Page //Note: Call within QueuedTask.Run() var cimReportPage = new CIMPage { Height = 12, StretchElements = false, Width = 6.5, ShowRulers = true, ShowGuides = true, Margin = new CIMMargin { Bottom = 1, Left = 1, Right = 1, Top = 1 }, Units = LinearUnit.Inches }; report.SetPage(cimReportPage); //Change only the report's page height report.SetPageHeight(12); #endregion }