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);