Revit 二次开发之“在两个机械设备之间创建风管”

在项目浏览器中，族->机械设备->M_VAV机组->尺寸 2 - 150mm 入口
创建一个族实例，再添加一个弯头，选中这两个设备。

//在两个机械设备之间添加风管
public Duct CreateDuctBetweenConnectors(UIDocument uiDocument)
{
    Connector connector1 = null, connector2 = null;
    ConnectorSetIterator csi = null;
    ElementSet selection = uiDocument.Selection.Elements;
    foreach (Element e in selection)
    {
        if (e is FamilyInstance)
        {
            FamilyInstance fi = e as FamilyInstance;
            Family family = fi.Symbol.Family;
            if (family.FamilyCategory.Name == "机械设备")
            {
                csi = fi.MEPModel.ConnectorManager.Connectors.ForwardIterator();
                while (csi.MoveNext())
                {
                    Connector conn = csi.Current as Connector;
                    //找到出风口且是送风系统
                    if (conn.Direction == FlowDirectionType.Out && conn.DuctSystemType == DuctSystemType.SupplyAir)
                    {
                        connector1 = conn;
                        break;
                    }
                }
            }
        }
    }
    foreach (Element e in selection)
    {
        if (e is FamilyInstance)
        {
            FamilyInstance fi = e as FamilyInstance;
            Family family = fi.Symbol.Family;
            if (family.FamilyCategory.Name != "机械设备")
            {
                csi = fi.MEPModel.ConnectorManager.Connectors.ForwardIterator();
                while (csi.MoveNext())
                {
                    if (null == connector2)
                    {
                        Connector conn = csi.Current as Connector;
                        //判断是不是在一条平行线上
                        if (Math.Abs(conn.Origin.Y - connector1.Origin.Y) < 0.001)
                        {
                            connector2 = conn;
                            break;
                        }
                    }
                }
            }
        }
    }
    Duct duct = null;
    if (null != connector1 && null != connector2)
    {
        FilteredElementCollector collector = new FilteredElementCollector(uiDocument.Document);
        collector.OfClass(typeof(DuctType));
        //随便找个风管类型，矩形风管，半径弯头/接头
        var query = from element in collector
                    where element.Name.Contains("弯头") == true
                    select element;
        DuctType ductType = collector.Cast<DuctType>().First<DuctType>();
        if (null != ductType)
        {
            duct = uiDocument.Document.Create.NewDuct(connector1, connector2, ductType);
        }
    }
    return duct;
}

fromhttp://revit.5d6d.com/thread-857-1-4.html