RevitAPI: 新建系统族类型并创建族实例

来源：互联网发布：什么是数据定义语言编辑：程序博客网时间：2024/05/04 11:40

昨天有客户问到如何通过API实现下面的步骤：

1. 新建一个系统族，并修改参数

2. 使用该系统族创建一个族实例，例如创建墙。

回答：

1. 新建族实例我们可以使用ElementType.Duplicate(string)方法，因为系统族是不允许用户创建的，我们只能复制一个。

2. 创建系统族可以使用形如Wall.Create方法或者Document.Create.NewFloor这样的方法。

下面是复制墙类型并创建墙的例子：

public static Document RevitDoc;public static Autodesk.Revit.ApplicationServices.Application RevitApp;public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements){    RevitApp = commandData.Application.Application;    var uiDoc = commandData.Application.ActiveUIDocument;    if (uiDoc == null)    {        message = "Please open a document";        return Result.Failed;    }    RevitDoc = commandData.Application.ActiveUIDocument.Document;    var uiSel = commandData.Application.ActiveUIDocument.Selection;    Transaction transaction = new Transaction(RevitDoc, "TestScript.CreateNewInstanceWithNewType");    transaction.Start();    try    {        var typeFilter = new ElementClassFilter(typeof(WallType));        FilteredElementCollector wallTypes = new FilteredElementCollector(RevitDoc);        wallTypes = wallTypes.WherePasses(typeFilter);        WallType walltype = null;        foreach (WallType wallType in wallTypes)        {            walltype = wallType;            break;        }        if (walltype != null)        {            //创建新的墙类型，使用Duplicate方法            var newtype = walltype.Duplicate(walltype.Name + "_new");            //可以在这里修改墙类型的参数，例如修改吸收率            var para = walltype.get_Parameter(BuiltInParameter.ANALYTICAL_ABSORPTANCE);            if (para != null && para.StorageType == StorageType.Double && para.IsReadOnly == false)            {                para.Set(2.0);            }            //找到一个标高            Level level = null;            var levelFilter = new ElementClassFilter(typeof(Level));            FilteredElementCollector levels = new FilteredElementCollector(RevitDoc);            levels = levels.WherePasses(levelFilter);            foreach (Level element in levels)            {                level = element;                break;            }            //创建墙            var wall = Wall.Create(RevitDoc, Line.CreateBound(new XYZ(0, 0, 0), new XYZ(10, 0, 0)),                 newtype.Id, level.Id, 20, 0, false, false);            TaskDialog.Show("wall creation", "wall created, id = " + wall.Id);        }        transaction.Commit();    }    catch (Exception ex)    {        message = ex.ToString();        transaction.RollBack();        return Result.Failed;    }    return Result.Succeeded;}

0 0