public static object GetReportParameters(ReportViewer element) =>
 element.GetValue(ReportParametersProperty);
 public static string GetDataSourceName(ReportViewer element) =>
 (string)element.GetValue(DataSourceNameProperty);
 public static object GetDataSourceValue(ReportViewer element) =>
 element.GetValue(DataSourceValueProperty);
 public static string GetReportSource(ReportViewer element) =>
 (string)element.GetValue(ReportSourceProperty);