DocumentSetDefaultFamilyTypeId Method

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

Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 27.0.4.0 (27.0.4.0)
Syntax
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public void SetDefaultFamilyTypeId(
	ElementId familyCategoryId,
	ElementId familyTypeId
)

Parameters

familyCategoryId  ElementId
The family category id.
familyTypeId  ElementId
The default family type id.
Exceptions
ExceptionCondition
ArgumentException The family type id familyTypeId is invalid for the give family category familyCategoryId. -or- familyCategoryId is not a built in category or parameter Element ID.
ArgumentNullException A non-optional argument was null
Example
C#
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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);
    }
}
See Also