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Type Parametres from systemfamilies

Message 1 of 6
2390 Views, 5 Replies

Type Parametres from systemfamilies


Hope some one can help me to get type parameters from a system family

I can get the instants like Area & Volume, but not eg. Keynote


With compoment families do I use eg Door.Symbol.get_Parameter(BuiltInParameter.KEYNOTE_PARAM);


But I can't get it to work with system families like floors.


Where do I fail ?? 🙂


FilteredElementCollector FMFloorCollector = new FilteredElementCollector(OpenDoc);


foreach (Floor FMFloor in FMFloorCollector)


Floor_Keynote = FMFloor.get_Parameter(BuiltInParameter.KEYNOTE_PARAM);

Floor_Family = FMFloor.get_Parameter(BuiltInParameter.ALL_MODEL_FAMILY_NAME);

Floor_Mark = FMFloor.get_Parameter(BuiltInParameter.ALL_MODEL_MARK);

Floor_Type = FMFloor.get_Parameter(BuiltInParameter.ALL_MODEL_TYPE_NAME);

Floor_Description = FMFloor.get_Parameter(BuiltInParameter.ALL_MODEL_DESCRIPTION);

Floor_Area = FMFloor.get_Parameter(BuiltInParameter.HOST_AREA_COMPUTED);

Floor_Volume = FMFloor.get_Parameter(BuiltInParameter.HOST_VOLUME_COMPUTED);


Message 2 of 6

Dear Anders,


Thank you for your query.


I have no idea what you are doing wrong.


However, I can certainly tell you how to do it right:


Simply download the built-in parameter checker and see how it is done there:




It is available from the BipChecker GitHub repository:


I hope this helps.


Best regards,



Jeremy Tammik
Developer Technical Services
Autodesk Developer Network, ADN Open
The Building Coder

Message 3 of 6



I tried, but Microsoft Visual Studio Express 2013, will not open the BipChecker.csproj file



I tried to run the addin in Revit 2016 (via the Add-in Managere (Manual mode), if that makes a diffirent 🙂

And got this message:


System.MissingMethodException: Method not found:

' Autodesk.Revit.DB.Element.get_parameter(System.AString)'.

at eseebase_AutoData.sharedParameterLoad.Execute(ExternalCommandDataCommandData, String& Message, elementSet elements) at AddinManager.AIMRunActtiveCommand(ExternalCommandData data, String& message, ElementSet elements)


Does that give you any ideas ? 🙂





Message 4 of 6

Dear Anders,


How you run it should make no difference.


The get_Parameter method is obsolete.


It is actually an auto-generated wrapper for the Parameter property.


It has been replaced by the GetParameter method, which now no longer is a property.


Are you sure you are using the most up-to-date version?


Probably not.


Check here:


The latest version is





Jeremy Tammik
Developer Technical Services
Autodesk Developer Network, ADN Open
The Building Coder

Message 5 of 6



It looks like you are trying to get information from instances of a floor. You are not having trouble with instance-based parameters, but you can't get type-based parameters. I would suggest that you find each instance, get the instance-based information, then find the type and get the type-based information.


I would suggest this:


foreach (Floor FMFloor in FMFloorCollector)
	//instance params
	Parameter Floor_Family = FMFloor.get_Parameter(BuiltInParameter.ALL_MODEL_FAMILY_NAME);
	Parameter Floor_Mark = FMFloor.get_Parameter(BuiltInParameter.ALL_MODEL_MARK);
	Parameter Floor_Type = FMFloor.get_Parameter(BuiltInParameter.ALL_MODEL_TYPE_NAME);
	Parameter Floor_Area = FMFloor.get_Parameter(BuiltInParameter.HOST_AREA_COMPUTED);
	Parameter Floor_Volume = FMFloor.get_Parameter(BuiltInParameter.HOST_VOLUME_COMPUTED);

	Element el = FMFloor as Element;
	ElementId typeid = el.GetTypeId();
	Element floortype = OpenDoc.GetElement(typeid);

	//type params
	Parameter Floor_Keynote = floortype.get_Parameter(BuiltInParameter.KEYNOTE_PARAM);
	Parameter Floor_Description = floortype.get_Parameter(BuiltInParameter.ALL_MODEL_DESCRIPTION);


Note that get_Parameter(string) is obsolete, but get_Parameter(BuiltInParameter) still works.

Message 6 of 6


That worked

Thanks a lot 🙂




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