I could solve it myself:
internal enum DrawingType
{
Unknown=0,
PID=1,
P3D=2,
Ortho=3,
Iso=4
}
Autodesk.AutoCAD.ApplicationServices.Document activeDocument = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;
Autodesk.AutoCAD.Interop.AcadDocument activeAcadDocument = Autodesk.AutoCAD.ApplicationServices.DocumentExtension.GetAcadDocument(ActiveDocument) as Autodesk.AutoCAD.Interop.AcadDocument;
Autodesk.AutoCAD.DatabaseServices.Database activeDatabase = ActiveDocument.Database;
Autodesk.ProcessPower.ProjectManager.PlantProject plantProject = Autodesk.ProcessPower.PlantInstance.PlantApplication.CurrentProject;
Autodesk.ProcessPower.ProjectManager.ProjectUnitsType projectUnits = pipingProjectPart.ProjectUnitsType;
Autodesk.ProcessPower.ProjectManager.Project pnidProjectPart = plantProject.ProjectParts["PnID"];
Autodesk.ProcessPower.ProjectManager.Project pipingProjectPart = plantProject.ProjectParts["Piping"];
Autodesk.ProcessPower.ProjectManager.Project orthoProjectPart = plantProject.ProjectParts["Ortho"];
Autodesk.ProcessPower.ProjectManager.Project isometricProjectPart = plantProject.ProjectParts["Iso"];
Autodesk.ProcessPower.DataLinks.DataLinksManager pnidDataLinksManager = pnidProjectPart.DataLinksManager;
Autodesk.ProcessPower.DataLinks.DataLinksManager pipingDataLinksManager = pipingProjectPart.DataLinksManager;
Autodesk.ProcessPower.DataLinks.DataLinksManager orthoDataLinksManager = orthoProjectPart.DataLinksManager;
Autodesk.ProcessPower.DataLinks.DataLinksManager isometricDataLinksManager = isometricProjectPart.DataLinksManager;
if (pnidDataLinksManager.GetDrawingId(db) != -1)
{
drawingType = DrawingType.PID;
}
else if (pipingDataLinksManager.GetDrawingId(db) != -1)
{
drawingType = DrawingType.P3D;
}
else if (orthoDataLinksManager.GetDrawingId(db) != -1)
{
drawingType = DrawingType.Ortho;
}
else if (isometricDataLinksManager.GetDrawingId(db) != -1)
{
drawingType = DrawingType.Iso;
}
else
{
}
switch (drawingType)
{
case DrawingType.PID:
{
// Get the piping drawing category names
List<string> catNames = pnidProjectPart.GetCategoryNames(CategoryType.eDrawing);
foreach (string catName in catNames)
{
List<KeyValuePair<string, string>> props = pnidProjectPart.GetDrawingProperties(fileName, catName);
foreach (KeyValuePair<string, string> prop in props)
{
System.Diagnostics.Debug.Print($"{catName}, {prop.Key}, {prop.Value}");
}
}
}
break;
case DrawingType.P3D:
{
// Get the piping drawing category names
List<string> catNames = pipingProjectPart.GetCategoryNames(CategoryType.eDrawing);
foreach (string catName in catNames)
{
List<KeyValuePair<string, string>> props = pipingProjectPart.GetDrawingProperties(fileName, catName);
foreach (KeyValuePair<string, string> prop in props)
{
System.Diagnostics.Debug.Print($"{catName}, {prop.Key}, {prop.Value}");
}
}
}
break;
case DrawingType.Ortho:
{
// Get the piping drawing category names
List<string> catNames = orthoProjectPart.GetCategoryNames(CategoryType.eDrawing);
foreach (string catName in catNames)
{
List<KeyValuePair<string, string>> props = orthoProjectPart.GetDrawingProperties(fileName, catName);
foreach (KeyValuePair<string, string> prop in props)
{
System.Diagnostics.Debug.Print($"{catName}, {prop.Key}, {prop.Value}");
}
}
}
break;
case DrawingType.Iso:
{
// Get the piping drawing category names
List<string> catNames = isometricProjectPart.GetCategoryNames(CategoryType.eDrawing);
foreach (string catName in catNames)
{
List<KeyValuePair<string, string>> props = isometricProjectPart.GetDrawingProperties(fileName, catName);
foreach (KeyValuePair<string, string> prop in props)
{
System.Diagnostics.Debug.Print($"{catName}, {prop.Key}, {prop.Value}");
}
}
}
break;
default:
break;
}
