Revit 2026 API
Number |
Creates a new instance of a NumberSystem associated to a host element, a view, and a reference level of stairs if in a multistory stairs.
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 26.0.4.0 (26.0.4.0)
Syntax
public static NumberSystem Create( Document document, ElementId viewId, LinkElementId hostElementId, StairsNumberSystemReferenceOption referenceOption, LinkElementId placementLevelId )
Public Shared Function Create ( document As Document, viewId As ElementId, hostElementId As LinkElementId, referenceOption As StairsNumberSystemReferenceOption, placementLevelId As LinkElementId ) As NumberSystem
public: static NumberSystem^ Create( Document^ document, ElementId^ viewId, LinkElementId^ hostElementId, StairsNumberSystemReferenceOption referenceOption, LinkElementId^ placementLevelId )
static member Create : document : Document * viewId : ElementId * hostElementId : LinkElementId * referenceOption : StairsNumberSystemReferenceOption * placementLevelId : LinkElementId -> NumberSystem
Parameters
- document Document
- The document.
- viewId ElementId
- The view in which the NumberSystem will be created.
- hostElementId LinkElementId
- The host id on which the NumberSystem will be created.
- referenceOption StairsNumberSystemReferenceOption
- The reference option of the NumberSystem.
- placementLevelId LinkElementId
- The id of the level on which the NumberSystem will be placed. The placement level must be one of the base levels of a stairs group members. It is suggested to get the level from MultistoryStairs.GetStairsPlacementLevels().
Return Value
NumberSystemThe created NumberSystem.

Exception | Condition |
---|---|
ArgumentException | viewId is not valid for placement of a NumberSystem (only floor plan views and elevation views are permitted). -or- hostElementId is not valid as a host for NumberSystem (only StairsRun elements are permitted in this release). -or- The reference option is not valid for a NumberSystem. -or- The placementLevelId is not one of the stairs base levels. -or- The hostElementId already has a number system. |
ArgumentNullException | A non-optional argument was null |
ArgumentOutOfRangeException | A value passed for an enumeration argument is not a member of that enumeration |

In multistory stairs, a stairs element could be a stair group or individual stair.
This method allows to add a NumberSystem for a run of an individual stairs or a stairs group member on the placementLevelId.
See Also