topic Re: Could I resize the dimensions of doors/windows by Revit API? in Revit API Forum

Could I resize the dimensions of doors/windows by Revit API?

u578850b — Mon, 13 Nov 2023 09:56:35 GMT

Hello,

I am wondering could I resize the dimensions of the host Family Instances (e.g. windows and doors) after they are created? The following is a case of creating a door onto a wall.

The first step I did was to collect the door Family Instances by filters:

IEnumerable <FamilySymbol> symbols =
new FilteredElementCollector(doc).OfCategory(BuiltInCategory.OST_Doors);

Then, create the door instance by

doc.Create.NewFamilyInstance
(XYZ location,FamilySymbol symbol, Element host, Level level, StructuralType)

There are several different dimensions of the doors symbols in "IEnumerable <FamilySymbol> symbols", and the dimensions of the door created are depended on which one of "FamilySymbol symbol" you choose as the input argument.

However, there are limited amounts of dimensions in the IEnumerable <FamilySymbol> symbols. If sometimes I want to customize the dimensions, such as creating a door with the dimensions of 850X1900mm. How can I sort it out? As well as how can I change the dimensions of other host Family Instances and elements such as windows, walls and railings.

In user interface, customizing the dimensions of the door (and other elements) can be easily done in 4 steps as the screenshot attached:

1. Select the door

2. Click "edit type" button on the properties panel

3. Change the dimensions as you wish

4. Click apply or OK.

Any information would be appreciated!

Best,

Re: Could I resize the dimensions of doors/windows by Revit API?

jeremy_tammik — Mon, 13 Nov 2023 12:21:38 GMT

Sounds to me as if what you are looking for is the Duplicate method on the family type:

https://www.revitapidocs.com/2024/b0e7d5d5-f33a-8ff2-b471-78a213f06ef5.htm

Here are some examples of using it:

Re: Could I resize the dimensions of doors/windows by Revit API?

u578850b — Tue, 14 Nov 2023 06:10:34 GMT

Thank you Jeremy.

I've looked through the links, but it seems... they are not the things what I am looking for.

Let me explain my question more specifically:

In the user interface, I can create a window onto a wall, and then I can change the dimension in two ways:

1. Click the window and then choosing one of the six different dimensions of "Window_Sgl_Plain" on the drop-down selection list on properties panel as "method 1" attached. But in this method, the window can only be resized into one of the six default dimensions.

2. If there is no a dimension I want to use in the method 1, I can click "Edit" button on the properties panel, and input the value of length and width as you wish as "method 2" attached.

In Revit API, I can only change the size of window in method 1, using the six existing dimensions collected in the API collector. But if I want to use a different dimension out of the existing six default dimensions, such as 850x1900mm which is not existed in the drop-down list, how can I achieve this in Revit API?

Best,

Roger

Re: Could I resize the dimensions of doors/windows by Revit API?

jeremy_tammik — Tue, 14 Nov 2023 08:37:29 GMT

You can programmatically select one of the family symbols in the document, call Duplicate on that to create a new family symbol, modify its dimensions (defined by family parameters) to suit your needs, and insert an instance of your new symbol.

Here is a partially related discussion going on right now, on how to handle the situation if a family has no symbols defined (I do not think this is the case in the situation you describe, but it illuminates some aspects that may help understand the process):

https://forums.autodesk.com/t5/revit-api-forum/create-the-first-symbol-of-a-family/td-p/12375239