Hi,
I am unsure of what you are trying to achieve...
If you want to print drawing to pdf you need to use a installed PDF-printer such as Adobe PDF or CutePDF and then print.
Here is an example:
PrintManager pm = _doc.GetPrintManager();
pm.SelectNewPrinter("Adobe PDF");
//Find your printsettings by looking here
var printSettingsList = _doc.GetPrintSettingIds().Select(x=>_doc.GetElement(x));
//Set appropriate printsetting
pm.CurrentPrintSetting = [the printsetting you want]
pm.Apply();
//find all your views and then iterate over them and submit print for each
pm.SubmitPrint([view])