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SetDefaultFamilyTypeId Method

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

Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 22.0.0.0 (22.1.0.0)
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

Copy C# 
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);
    }
}
Copy VB.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

Exception Condition
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