Revit 2025.3 API
Datum |
Sets the leader to the indicated end of the datum plane. This method does not apply to Reference planes (which do not support leaders).
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 25.3.0.0 (25.3.0.0)
Syntax
public void SetLeader( DatumEnds datumEnd, View view, Leader pLeader )
Public Sub SetLeader ( datumEnd As DatumEnds, view As View, pLeader As Leader )
public: void SetLeader( DatumEnds datumEnd, View^ view, Leader^ pLeader )
member SetLeader : datumEnd : DatumEnds * view : View * pLeader : Leader -> unit
Parameters

Exception | Condition |
---|---|
ArgumentException | One of the conditions is not valid: the input leader and view is not null; The leader End, Elbow, Anchor should be in the view; the End of leader should be in the datum plane curves; Elbow is between End and Anchor. -or- The datum plane cannot be visible in the view. -or- The bubble is not visible at the datumEnd of the datum plane. |
ArgumentNullException | A non-optional argument was null |
ArgumentOutOfRangeException | A value passed for an enumeration argument is not a member of that enumeration |

The leader can be applied only to ends where the bubble is set to be shown.
See Also