Revit 2025.3 API
| Filled | 
   The background fill pattern Id.
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 25.3.0.0 (25.3.0.0)
Syntax
public ElementId BackgroundPatternId { get; set; }
Public Property BackgroundPatternId As ElementId Get Set
public: property ElementId^ BackgroundPatternId { ElementId^ get (); void set (ElementId^ value); }
member BackgroundPatternId : ElementId with get, set
Property Value
ElementId Exceptions
Exceptions| Exception | Condition | 
|---|---|
| ArgumentException | When setting this property: The patternId must either be InvalidElementId or represent a valid FillPatternElement. -or- When setting this property: The patternId must be a 'Drafting' pattern. -or- When setting this property: In a family the patternId can not be a solid fill pattern if the 'IsMasking' property is false. | 
| ArgumentNullException | When setting this property: A non-optional argument was null | 
 Remarks
Remarks
   The FillPattern used for a background pattern must have a 'Drafting' target.
   This applies to both project and family elements.
   In addition, when the FilledRegionAttributes element is in a family, the pattern
   cannot be the solid fill pattern unless the 'IsMasking' property is set to true.
   InvalidElementId is used when there is no background pattern
See Also