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NewFamilyInstances2 Method

Item Factory Base New Family Instances 2 Method

Creates Family instances within the document.

Namespace: Autodesk.Revit.Creation
Assembly: RevitAPI (in RevitAPI.dll) Version: 25.0.0.0 (25.0.0.0)
Syntax 
public ICollection<ElementId> NewFamilyInstances2(
	List<FamilyInstanceCreationData> dataList
)

Parameters

dataList List FamilyInstanceCreationData
A list of FamilyInstanceCreationData which wraps the creation arguments of the families to be created.

Return Value

ICollection ElementId
If the creation is successful, a set of ElementIds which contains the Family instances should be returned, otherwise the exception will be thrown.
Exceptions
Exception Condition
ArgumentNullException If FamilyInstanceCreationData's 'curve' or 'symbol' member is .
InvalidOperationException If regeneration fails at the end of the batch creation.
Remarks

Note: ForbiddenForDynamicUpdateException might be thrown during a dynamic update if the inserted instance establishes a mutual dependency with another structure.

Note: if the created family instance includes nested instances, the API framework will automatically regenerate the document during this method call.

Example 
ICollection<ElementId> BatchCreateColumns(Autodesk.Revit.DB.Document document, Level level)
{
    List<FamilyInstanceCreationData> fiCreationDatas = new List<FamilyInstanceCreationData>();

    //ElementSet elementSet = null;
    ICollection<ElementId> elementSet = null;

    //Try to get a FamilySymbol
    FamilySymbol familySymbol = null;
    FilteredElementCollector collector = new FilteredElementCollector(document);
    ICollection<Element> collection = collector.OfClass(typeof(FamilySymbol)).ToElements();
    foreach (Element e in collection)
    {
        familySymbol = e as FamilySymbol;
        if (null != familySymbol.Category)
        {
            if ("Structural Columns" == familySymbol.Category.Name)
            {
                break;
            }
        }
    }

    if (null != familySymbol)
    {
        //Create 10 FamilyInstanceCreationData items for batch creation 
        for (int i = 1; i < 11; i++)
        {
            XYZ location = new XYZ(i * 10, 100, 0);
            FamilyInstanceCreationData fiCreationData =
                new FamilyInstanceCreationData(location, familySymbol, level,  StructuralType.Column);

            if (null != fiCreationData)
            {
                fiCreationDatas.Add(fiCreationData);
            }
        }

        if (fiCreationDatas.Count > 0)
        {
            // Create Columns
            elementSet = document.Create.NewFamilyInstances2(fiCreationDatas);
        }
        else
        {
            throw new Exception("Batch creation failed.");
        }
    }
    else
    {
        throw new Exception("No column types found.");
    }

    return elementSet;
}
See Also