Create and modify Global Type Parameter with API

[nicolas.calvi]

Hi,

I try to create on runtime (API and C# on Revit 2020) some Global Parameter to a Type and set a default value.

Currently I do it with Shared Parameter, but I want to do it with Global Parameter of the current document.

Is there a way to acheive this with API ?

Thanks.

[naveen.kumar.t]

Hi  @nicolas.calvi ,

Global parameters may be created only in Project documents, not in families.

Global parameters can be created with almost any type of data, there are a few types that are not currently supported, such as the ElementId type. Programmers can test whether a particular data type is appropriate for a global parameter by using the IsValidDataType(ParameterType) method.

1)Create a global parameter

https://www.revitapidocs.com/2016/57899395-e9df-4066-121d-046ee7a7425e.htm 

2)Set value to global parameter

https://www.revitapidocs.com/2020/df012c22-6e65-8de5-1057-f15660d02288.htm

Also, have a look at this below link

https://forums.autodesk.com/t5/revit-api-forum/get-or-set-global-parameter-group/td-p/9172280

https://www.revitapidocs.com/2020/f3af05ec-1f0c-fe86-6708-0a211a40bcda.htm

[nicolas.calvi]

Thanks, we try have a look to your links.

[nicolas.calvi]

Ok, I think there was a problem of understanding. I'm actually trying to create a global (unshared) project setting, as the screenshot below shows.

How do you do this with the Revit API.

[naveen.kumar.t · Accepted solution]

Hi @nicolas.calvi ,

The dialog box in your screenshot image is related to the project parameter and shared parameters but not related to the global parameter.

The global parameter is different from the project parameter.

I think you are trying to create a project parameter.

I think it is not possible to create a non-shared project parameter via Revit API but you can create a shared project parameter via Revit API.

https://spiderinnet.typepad.com/blog/2011/05/parameter-of-revit-api-31-create-project-parameter.html 

I hope this helps.