Revit开发 - 创建梁（Beam）

   本文演示Revit中梁的创建。

  实例代码：

using Autodesk.Revit.Attributes;
using Autodesk.Revit.DB;
using Autodesk.Revit.DB.Structure;
using Autodesk.Revit.UI;

namespace RevitAddin4
{
    [TransactionAttribute(TransactionMode.Manual)]
    public class RevitAddin : IExternalCommand
    {
        public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)
        {
            UIDocument uiDoc = commandData.Application.ActiveUIDocument;
            Document doc = uiDoc.Document;
            FilteredElementCollector collector = new FilteredElementCollector(doc);
            collector.OfCategory(BuiltInCategory.OST_StructuralFraming);
            FamilySymbol familySymbol = null;
            foreach (var item in collector)
            {
                familySymbol = item as FamilySymbol;
                if (familySymbol != null)
                    break;
            }
            //创建线
            Curve curve = Line.CreateBound(new XYZ(0, 0, 0), new XYZ(0, 20, 0));
            //获取当前视图的标高
            Level level = doc.ActiveView.GenLevel;
            if (level == null)
            {
                TaskDialog.Show("错误", "不是PlainView");
                return Result.Failed;
            }
            //创建梁
            using (Transaction tr = new Transaction(doc))
            {
                tr.Start("Create beam");
                if(!familySymbol.IsActive)
                    familySymbol.Activate();
                doc.Create.NewFamilyInstance(curve, familySymbol, level, StructuralType.Beam);
                tr.Commit();
            }
            return Result.Succeeded;
        }
    }
}

    运行结果：