Constrain the length of a segment by parameterizing its length. 
   Namespace:   Autodesk.Revit.DB.Structure  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
Syntax
| C# | 
|---|
   |  
| Visual Basic | 
|---|
   |  
| Visual C++ | 
|---|
   |  
Parameters
- iSegment
 -  Type:  System Int32  
Index of the segment (0 to NumberOfSegments - 1). 
- paramId
 -  Type:  Autodesk.Revit.DB ElementId  
Id of a parameter to drive the constraint. To obtain the id of a shared parameter, call RebarShape.GetElementIdForExternalDefinition(). 
- measureToOutsideOfBend0
 -  Type:  System Boolean  
Choose between two possibilities for the first reference of the length dimension. If false, the reference is at the point where the bend begins; equivalently, at the projection of the bend centerpoint onto the segment. If true, the reference is moved outward by a distance equal to the bend radius plus the bar diameter; if the bend is a right angle or greater, this is equivalent to putting the reference at the outer face of the bend. 
- measureToOutsideOfBend1
 -  Type:  System Boolean  
Choose between two possibilities for the second reference of the length dimension. 
Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions ArgumentException | iSegment is not between 0 and NumberOfSegments. -or- paramId is not the id of a shared parameter in the current document, or its unit type is not UT_Reinforcement_Length or UT_Angle. | 
| Autodesk.Revit.Exceptions ArgumentNullException | A non-optional argument was NULL |