revit 链接模型的图元获取

using Autodesk.Revit.DB;
using Autodesk.Revit.UI;
using System.Collections.Generic;
using System.Linq;namespace RevitLinkElementExtractor
{[Autodesk.Revit.Attributes.Transaction(Autodesk.Revit.Attributes.TransactionMode.ReadOnly)]public class LinkElementCollector : IExternalCommand{public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements){var doc = commandData.Application.ActiveUIDocument.Document;foreach (RevitLinkInstance link in new FilteredElementCollector(doc).OfClass(typeof(RevitLinkInstance))){TaskDialog.Show("链接模型", link.Name);var linkDoc = link.GetLinkDocument();var elementsInLink = new FilteredElementCollector(linkDoc).WhereElementIsNotElementType();ProcessElements(elementsInLink.ToElements(), link.Name);}return Result.Succeeded;}private void ProcessElements(IEnumerable<Element> elements, string linkName){var count = new Dictionary<string, int>();foreach (var e in elements){var typeName = e.GetType().Name;if (count.ContainsKey(typeName)) count[typeName]++;else count.Add(typeName, 1);}TaskDialog.Show("图元统计", string.Join("\n",count.Select(p => $"{p.Key}: {p.Value}")));}}
}