DocumentGetDefaultFamilyTypeId Method

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

Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 27.0.4.0 (27.0.4.0)
Syntax
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public ElementId GetDefaultFamilyTypeId(
	ElementId familyCategoryId
)

Parameters

familyCategoryId  ElementId
The family category id.

Return Value

ElementId
The default family type id.
Exceptions
ExceptionCondition
ArgumentException 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 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;
        }
    }
}
See Also