topic Re: How to get Angle parameter from FamilyInstance in Revit API Forum

How to get Angle parameter from FamilyInstance

kireandreev — Sat, 09 Jan 2021 01:58:42 GMT

Dear,

I would like to ask how to get Angle parameter from FamilyInstance?

I try with:

var angle=e.LookupParameter("Size").AsString(); retrieve value null, but Angle in Revit Properties->Dimensions is 90 degree.

Best Regard.

Re: How to get Angle parameter from FamilyInstance

architect.bim — Sat, 09 Jan 2021 08:37:22 GMT

Hi!

What do you mean by "Angle" parameter. What category does your family instance belong to?

If parameter's name is "Angle" why do you use name "Size" to retrieve it? Furthermore is your parameter's StorageType is really string?

I think you should do the following:

Select necessary element;
inspect it through RevitLookup;
go to "Parameters" property;
select necessary parameter;
check its StorageType;
choose appropriate method to get its value.

After this use parameter's name and chosen method to get ist value.

Re: How to get Angle parameter from FamilyInstance

kireandreev — Sat, 09 Jan 2021 09:50:37 GMT

Dear,

This is my error. var angle=e.LookupParameter("Size").AsString(); must to be

var angle=e.LookupParameter("Angle").AsString();

I would like to get value of Angle like in picture below:

Best regard.

Re: How to get Angle parameter from FamilyInstance

architect.bim — Sat, 09 Jan 2021 12:20:08 GMT

Oh I see... The StorageType of this parameter is Double. You should use AsDouble() method to get its value. This value is in internal Revit Units - Radians. If you need decimal degrees - you should convert it.

On the other hand if you need to get exact representation of this parameter's value as you see in Revit UI, you can use AsValueString() method. It will return string "90.00°"