Creates a new radial array element from a set of elements based on an input rotation axis. 
   Namespace:   Autodesk.Revit.DB  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
Syntax
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Parameters
- aDoc
-  Type:  Autodesk.Revit.DB Document  
 The document.
- dBView
-  Type:  Autodesk.Revit.DB View  
 The view. If it is a 2d view, translation vector must be in the view plane if elements include view-specific elements. If elements include view-specific elements, they must belong to this view.
- ids
-  Type:  System.Collections.Generic ICollection   ElementId  
 The set of elements to array. The position of the rotation axis is determined by the cumulative center of the elements' bounding boxes.
- count
-  Type:  System Int32  
 The number of array members to create. The accepted range is from 3 to 200.
- axis
-  Type:  Autodesk.Revit.DB Line  
 The rotation axis.
- angle
-  Type:  System Double  
 The angle in radians of the rotation.
- anchorMember
-  Type:  Autodesk.Revit.DB ArrayAnchorMember  
 Indicates if the translation vector specifies the location of the second member of the array, or the last member of the array.
Return Value
The new radial array element.Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions ArgumentException | The given element id set is empty. -or- One or more elements in ids do not exist in the document. -or- One or more elements in ids is owned by different views and thus cannot be arrayed together. -or- One or more elements in ids is not arrayable. -or- count must be between 3 and 200. -or- The view is invalid for specific view elements array. -or- The rotation axis is invalid to array the elements. | 
| Autodesk.Revit.Exceptions ArgumentNullException | A non-optional argument was NULL | 
| Autodesk.Revit.Exceptions ArgumentOutOfRangeException | A value passed for an enumeration argument is not a member of that enumeration | 
| Autodesk.Revit.Exceptions InvalidOperationException | Failed to create the radial array. |