CreateStartConstraint Method
Creates a constraint for the start handle of the rebar. This constraint will be set preferred after the API execution is finished successfully.

Namespace: Autodesk.Revit.DB.Structure
Assembly: RevitAPI (in RevitAPI.dll) Version: 20.0.0.0 (20.1.1.1)
Since:  2018

Syntax

C#
public bool CreateStartConstraint(
	IList<Reference> targetReferences,
	bool isConstraintToCover,
	double offsetValue
)
Visual Basic
Public Function CreateStartConstraint ( _
	targetReferences As IList(Of Reference), _
	isConstraintToCover As Boolean, _
	offsetValue As Double _
) As Boolean
Visual C++
public:
bool CreateStartConstraint(
	IList<Reference^>^ targetReferences, 
	bool isConstraintToCover, 
	double offsetValue
)

Parameters

targetReferences
Type: System.Collections.Generic..::..IList<(Of <(<'Reference>)>)>
The references to which the rebar handle will be constrained. Will throw exception if it's empty or if it's anything but Face(s) from a structural that can host rebar.
isConstraintToCover
Type: System..::..Boolean
If true the RebarConstraintType will be set to ToCover, otherwise RebarConstraintType will be set to FixedDistanceToHostFace.
offsetValue
Type: System..::..Double
The distance from references to the rebar handle.

Return Value

Returns true if a start constraint can be created with the given references, false otherwise. The reference should be faces from structurals that can host rebar.

Exceptions

ExceptionCondition
Autodesk.Revit.Exceptions..::..ArgumentNullException A non-optional argument was NULL

See Also

M:Autodesk.Revit.DB.Structure.RebarTrimExtendData.CreateStartConstraint(System.Collections.Generic.IList{Autodesk.Revit.DB.Reference},System.Boolean,System.Double)