AssemblyInstanceCreate Method

Creates a new assembly instance.

Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 25.0.0.0 (25.0.0.0)
Syntax
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public static AssemblyInstance Create(
	Document document,
	ICollection<ElementId> assemblyMemberIds,
	ElementId namingCategoryId
)

Parameters

document  Document
The document containing the elements.
assemblyMemberIds  ICollectionElementId
The elements that comprise the assembly.
namingCategoryId  ElementId
The naming category for the assembly instance.

Return Value

AssemblyInstance
The newly created assembly instance.
Exceptions
ExceptionCondition
ArgumentException One or more element ids was not permitted for membership in the assembly instance. Elements should be of a valid category and should not be a member of an existing assembly. -or- This naming category was not valid for an assembly instance containing the proposed members. The naming category should match one of the member element categories.
ArgumentNullException A non-optional argument was null
InvalidOperationException The document is in failure mode: an operation has failed, and Revit requires the user to either cancel the operation or fix the problem (usually by deleting certain elements).
ModificationForbiddenException The document is in failure mode: an operation has failed, and Revit requires the user to either cancel the operation or fix the problem (usually by deleting certain elements). -or- The document is being loaded, or is in the midst of another sensitive process.
ModificationOutsideTransactionException The document has no open transaction.
Remarks
Transaction must be committed after calling this method before performing any action on the newly created instance. Assembly type is assigned after the transaction for creating assembly instance is complete.
See Also