Set Global Parameter value

[Anonymous]

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

[jeremytammik]

Yes. The variable variable is not set.

Cheers,

Jeremy

[GonçaloFeio1321]

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.

[Anonymous]

The parameter does exists on file.

Please check the image bellow to see the exception message.

[Anonymous]

Can you tell me how to solve it please?

[matthew_taylor]

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

[matthew_taylor · Accepted solution]

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

[Anonymous]

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));

[GonçaloFeio1321]

@matthew_taylor already answered. You need a started Transaction.