Document.GetDefaultFamilyTypeId Method

Gets the default family type id with the given family category id.

Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 26.4.0.0 (26.4.0.0)

Syntax

C#

public ElementId GetDefaultFamilyTypeId(
	ElementId familyCategoryId
)

Parameters

familyCategoryId ElementId: The family category id.

Return Value

ElementId
The default family type id.

Exceptions

Exception	Condition
ArgumentException	familyCategoryId is not a built in category or parameter Element ID.
ArgumentNullException	A non-optional argument was null

Example

C#

private void AssignDefaultTypeToColumn(Document document, FamilyInstance column)
{
    ElementId defaultTypeId = document.GetDefaultFamilyTypeId(new ElementId(BuiltInCategory.OST_StructuralColumns));

    if (defaultTypeId != ElementId.InvalidElementId)
    {
        FamilySymbol defaultType = document.GetElement(defaultTypeId) as FamilySymbol;
        if (defaultType != null)
        {
            column.Symbol = defaultType;
        }
    }
}

VB

Private Sub AssignDefaultTypeToColumn(document As Document, column As FamilyInstance)
   Dim defaultTypeId As ElementId = document.GetDefaultFamilyTypeId(New ElementId(BuiltInCategory.OST_StructuralColumns))

   If defaultTypeId <> ElementId.InvalidElementId Then
      Dim defaultType As FamilySymbol = TryCast(document.GetElement(defaultTypeId), FamilySymbol)
      If defaultType IsNot Nothing Then
         column.Symbol = defaultType
      End If
   End If
End Sub