How to get Type Parameters of beam?

[Anonymous]

Hello,

I am new to programming Revit APIs, so I would need some help to start. I am trying to create simple API for calculating beams. To do taht I need Beam Type Parameters.

Can anyone tell me how to get Type Parameter, or send me related link ( I can find any).

I suppose code should looks something like this:

        Selection sel = uidoc.Selection;

        Reference pickedRef = null;

        pickedRef = sel.PickObject(ObjectType.Element, "Please select beam");

        Element e = doc.GetElement(pickedRef);

        //don't know which parameter of Element object to use

        double sectionHeight = e.???

Or should I create some other object, not Element object to get Type Parameters?

Thanks,

Milos

[Revitalizer · Accepted solution]

Hi,

an Element's type parameters are in fact its ElementType's instance parameters:

http://forums.autodesk.com/t5/revit-api/reading-instance-parameters-by-api/td-p/5904422

Revitalizer

[Anonymous]

Hi,

Thanks! Yes, that was what I did't know.

I supose now I sould select type parameter like this:

        Element e = doc.GetElement(pickedRef);

        ElementType type = doc.GetElement(e.GetTypeId()) as ElementType;

        BuiltInParameter height = BuiltInParameter.FAMILY_HEIGHT_PARAM;
        Parameter h = type.get_Parameter(height);

But where I try to use that Parameter h, I get null exception, am I missing somthing again?

[Revitalizer · Accepted solution]

Hi MilosNS90,

I would suppose to use RevitLookup to examine the parameters of these objects:

Element e

ElementType type

and, if e is a FamilyInstance and type is a FamilySymbol,

this FamilySymbols's Family also has a set of its own parameters.

If BuiltInParameter.FAMILY_HEIGHT_PARAM is not present, you may find the matching BuiltInParameter this way.

Revitalizer

[Anonymous · Accepted solution]

Hi,

this would be what I was looking for:

        Element e = doc.GetElement(pickedRef);

        ElementType type = doc.GetElement(e.GetTypeId()) as ElementType;

        //to get height of section
        Parameter h = type.LookupParameter("h");
        double height = h.AsDouble();

        //to get width of section
        Parameter b = type.LookupParameter("b");
        double width = b.AsDouble();

        //and so on...

[hauvillec]

Hi ! 

I am trying to do the same with a "bathtube" family to get the width and length of it but it's not successful...

Any idea ?