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2027 Method
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FamilyItemFactory.NewArcLengthDimension

Description:
Creates a new arc length dimension object using the default dimension type.
Remarks:
The currently user set default style is used for the created dimension.
Overloads (2):
NewArcLengthDimension
NewArcLengthDimension(View,Arc,Reference,Reference,Reference)
NewArcLengthDimension(View,Arc,Reference,Reference,Reference,DimensionType) 
public Dimension NewArcLengthDimension(
	View view,
	Arc arc,
	Reference arcRef,
	Reference firstRef,
	Reference secondRef
)
  • View
    view
    The view in which the dimension is to be visible.
  • Arc
    arc
    The extension arc of the dimension.
  • Reference
    arcRef
    Geometric reference of the arc to which the dimension is to be bound. This reference must be parallel to the extension arc.
  • Reference
    firstRef
    The first geometric reference to which the dimension is to be bound. This reference must intersect the arcRef reference.
  • Reference
    secondRef
    The second geometric reference to which the dimension is to be bound. This reference must intersect the arcRef reference.
Return Value Dimension If creation was successful the new arc length dimension is returned, otherwise an exception with failure information will be thrown. 
public Dimension CreateArcDimension(Document document, SketchPlane sketchPlane)
{
    Autodesk.Revit.Creation.Application appCreate = document.Application.Create;
    Line gLine1 = Line.CreateBound(new XYZ(0, 2, 0), new XYZ(2, 2, 0));
    Line gLine2 = Line.CreateBound(new XYZ(0, 2, 0), new XYZ(2, 4, 0));
    Arc arctoDim = Arc.Create(new XYZ(1, 2, 0), new XYZ(-1, 2, 0), new XYZ(0, 3, 0));
    Arc arcofDim = Arc.Create(new XYZ(0, 3, 0), new XYZ(1, 2, 0), new XYZ(0.8, 2.8, 0));

    Autodesk.Revit.Creation.FamilyItemFactory creationFamily = document.FamilyCreate;
    ModelCurve modelCurve1 = creationFamily.NewModelCurve(gLine1, sketchPlane);
    ModelCurve modelCurve2 = creationFamily.NewModelCurve(gLine2, sketchPlane);
    ModelCurve modelCurve3 = creationFamily.NewModelCurve(arctoDim, sketchPlane);
    //get their reference
    Reference ref1 = modelCurve1.GeometryCurve.Reference;
    Reference ref2 = modelCurve2.GeometryCurve.Reference;
    Reference arcRef = modelCurve3.GeometryCurve.Reference;

    Dimension newArcDim = creationFamily.NewArcLengthDimension(document.ActiveView, arcofDim, arcRef, ref1, ref2);
    if (newArcDim == null)
    {
        throw new Exception("Failed to create new arc length dimension.");
    }

    return newArcDim;
}