Sets the default family type id for the given family category.

Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 21.0.0.0 (21.1.1.109)
Since:  2015

Syntax

C#
public void SetDefaultFamilyTypeId(
	ElementId familyCategoryId,
	ElementId familyTypeId
)
Visual Basic
Public Sub SetDefaultFamilyTypeId ( _
	familyCategoryId As ElementId, _
	familyTypeId As ElementId _
)
Visual C++
public:
void SetDefaultFamilyTypeId(
	ElementId^ familyCategoryId, 
	ElementId^ familyTypeId
)

Parameters

familyCategoryId
Type: Autodesk.Revit.DB..::..ElementId
The family category id.
familyTypeId
Type: Autodesk.Revit.DB..::..ElementId
The default family type id.

Examples

CopyC#
private void SetDefaultTypeFromDoor(Document document, FamilyInstance door)
{
    ElementId doorCategoryId = new ElementId(BuiltInCategory.OST_Doors);

    // It is necessary to test the type suitability to be a default family type, for not every type can be set as default. 
    // Trying to set a non-qualifying default type will cause an exception
    if (door.Symbol.IsValidDefaultFamilyType(doorCategoryId))
    {
        document.SetDefaultFamilyTypeId(doorCategoryId, door.Symbol.Id);
    }
}
CopyVB.NET
Private Sub SetDefaultTypeFromDoor(document As Document, door As FamilyInstance)
   Dim doorCategoryId As New ElementId(BuiltInCategory.OST_Doors)

   ' It is necessary to test the type suitability to be a default family type, for not every type can be set as default. 
   ' Trying to set a non-qualifying default type will cause an exception
   If door.Symbol.IsValidDefaultFamilyType(doorCategoryId) Then
      document.SetDefaultFamilyTypeId(doorCategoryId, door.Symbol.Id)
   End If
End Sub

Exceptions

ExceptionCondition
Autodesk.Revit.Exceptions..::..ArgumentException The family type id familyTypeId is invalid for the give family category familyCategoryId.
Autodesk.Revit.Exceptions..::..ArgumentNullException A non-optional argument was NULL

See Also