Landscape by default for printing GanttChartDataGrid (WPF)

If you want to set up printing as Landscape by default when you use GanttChartDataGrid or other components from DlhSoft Gantt Chart Light Library for WPF, it’s as easy as this:

var dialog = new PrintDialog();
dialog.PrintTicket.PageOrientation = PageOrientation.Landscape;
if (dialog.ShowDialog() == true)
{
  var documentPaginator = new GanttChartDataGrid.DocumentPaginator(GanttChartDataGrid);
  documentPaginator.PageSize = new Size(dialog.PrintableAreaWidth, dialog.PrintableAreaHeight);
  dialog.PrintDocument(documentPaginator, "Gantt Chart document");
}

And if you also want to print the entire grid and chart on a single page, just follow the guidelines (or the sample app) here.