topic Re: Set Global Parameter value in Revit API Forum

Set Global Parameter value

Anonymous — Tue, 13 Dec 2016 11:11:05 GMT

Hello everyone.

I'm trying to apply a value to a Global Parameter. Can anyone tell me why the follwing code doesn't work:

double value = 55;

ElementId paramId = GlobalParametersManager.FindByName(doc, "ParameterName");
GlobalParameter param = doc.GetElement(variable) as GlobalParameter;

paramSetValue(new DoubleParameterValue(value));

Thank you

Re: Set Global Parameter value

jeremytammik — Tue, 13 Dec 2016 11:28:13 GMT

Yes. The variable variable is not set.

Cheers,

Jeremy

Re: Set Global Parameter value

GonçaloFeio1321 — Tue, 13 Dec 2016 11:29:39 GMT

Please tell what went wrong, what exception was thrown.

paramId returnsInvalidElementId if no GlobalParameter is found with that name.

Then, param.SetValue should had worked.

Re: Set Global Parameter value

Anonymous — Tue, 13 Dec 2016 11:37:45 GMT

The parameter does exists on file.

Please check the image bellow to see the exception message.

Re: Set Global Parameter value

Anonymous — Tue, 13 Dec 2016 11:38:45 GMT

Can you tell me how to solve it please?

Re: Set Global Parameter value

matthew_taylor — Tue, 13 Dec 2016 11:38:51 GMT

Hi @Anonymous

There's a pretty decent example here:

http://www.revitapidocs.com/2016/df012c22-6e65-8de5-1057-f15660d02288.htm

There are also a lot of notes that look worth reading here:

http://www.revitapidocs.com/2016/b0e53a4a-84ad-abb4-358d-9797870f101b.htm

Also, your quasi-code has a couple of issues. (A missing period, inconsistent variable naming.) I wonder whether one of those are your actual problem?

-Matt

Re: Set Global Parameter value

matthew_taylor — Tue, 13 Dec 2016 11:41:02 GMT

Sounds like you just need a valid transaction. There's an example of that in the links I provided.

Re: Set Global Parameter value

Anonymous — Tue, 13 Dec 2016 13:43:07 GMT

Sorry, as Jeremy said there is an error in the code i've pasted above but the problem stills the same:

double value = 55;

ElementId paramId = GlobalParametersManager.FindByName(doc, "ParameterName");
GlobalParameter param = doc.GetElement(paramId) as GlobalParameter;

paramSetValue(new DoubleParameterValue(value));

Re: Set Global Parameter value

GonçaloFeio1321 — Tue, 13 Dec 2016 14:03:30 GMT

@matthew_taylor already answered. You need a started Transaction.