topic Re: Setting Pipe Size in Revit API Forum

Setting Pipe Size

allan.moraes — Mon, 04 Jan 2021 17:16:34 GMT

Hello everyone!

Happy New Year to you all!

I'm trying to change a pipe size using a pre-defined array. Everything goes fine throughout the code, until when I try to set the size parameter's value to any of the pre-defined values, an exception is thrown saying that the parameter is read-only. I already tried using transactions and not using them as well, but no further progress was made.

I searched for any other way on doing it but wasn't successful.

Can anyone come up with an idea?

Thank you!

Re: Setting Pipe Size

jeremytammik — Mon, 04 Jan 2021 17:20:53 GMT

Try it out in the user interface.

Can you change the pipe size for an individual element?

I don't think so.

You can only change it for the entire run.

The run controls the pipe size of its member elements.

Therefore, the pipe size of each individual element is read-only.

Use RevitLookup to explore the model and research where this setting is stored in the pipe run, and set it there to modify all its member elements.

Re: Setting Pipe Size

allan.moraes — Mon, 04 Jan 2021 17:30:42 GMT

I'm sorry Jeremy, maybe I didn't make myself clear.

I'm actually trying to change it's diameter, as it can be done by selecting a pipe in the project (as in the attached). Is that possible?

And you said about using a pipe run, how am I able to do that, I'm sorry for the newbie questions, but I've been facing real trouble to find information about Revit API.

Thank you for your time 😄

Re: Setting Pipe Size

architect.bim — Mon, 04 Jan 2021 18:01:08 GMT

You should use this BuiltInParameter:

In Python it looks like this:

parameter = element.Parameter[BuiltInParameter.RBS_PIPE_DIAMETER_PARAM] with DB.Transaction(doc, 'Set Pipe Diameter') as t: t.Start() parameter.Set(value) t.Commit()

Re: Setting Pipe Size

allan.moraes — Mon, 04 Jan 2021 18:10:30 GMT

Thank you guys. You helped a lot, now let me continue on my research here. By the way the code for that in C# @architect.bim was:

Element pipeElement = pipe as Element;
Transaction trans = new Transaction(document);
trans.Start("Pipe Resize By Size");
Parameter sizeParameter = pipeElement.get_Parameter(BuiltInParameter.RBS_PIPE_DIAMETER_PARAM);
sizeParameter.Set(size);
trans.Commit();

Re: Setting Pipe Size

jose_loaiza5W6L6 — Tue, 24 Sep 2024 14:59:50 GMT

Hello Allan

Do you was able to figure out the issue?, I have similar situation trying to update slope parameter