【转】【Revit】revit二次开发——基于teigha读取CAD几何与文字（提供源码、引用包与异常解决）
1.下载64位Teigha完整包：
链接: https://pan.baidu.com/s/1KXW54YlkkWJZNQYhbc99kw 提取码: 0505
2.VS平台架构选择64位，.net版本4.0以上：
3.dll必须手动指定引用：（重点）
static string dll = @"D:\Desktop\Rvt\bin\Debug\TD_Mgd.dll";//引用位置 Assembly a = Assembly.UnsafeLoadFrom(dll);
4.以上注意事项处理不对，会引发以下异常：
1.不是有效的32位程序：
原因：
（1）加载外部程序集TD_Mgd.dll不合适
（2）处理器架构与引用dll不匹配
解决办法：
（1）使用64位Teigha库，不能使用32位，因为RevitAPI与RevitAPIUI是使用64位；
（2）更改平台架构为64位：
2.找不到指定模块或依赖项
这个问题困扰很多人，大多的解决办法是不行更有骗人的，其实就两行代码的问题。
问题的根本原因是 ：
在类库项目中引用了外部程序集TD_Mgd.dll，.Net的安全机制阻止了本地的Assembly。具体可参见该博客：问题解决方案
解决办法：使用3说的，手动引用即可。
代码参考：
1.revit接口代码
public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements) { //1.通过选择获取元素 Reference reference1 = uiDoc.Selection.PickObject(Autodesk.Revit.UI.Selection.ObjectType.Element，"点击图元"); Element item = revitDoc.GetElement(reference1); ElementId elementId = item.GetTypeId(); Element element = revitDoc.GetElement(elementId); //2.获取CAD链接文件路径 string cadStirng = Path.GetDirectoryName(revitDoc.PathName) + "\\" + revitDoc.GetElement(element .GetTypeId()).Name; //3.获取CAD文字： ReadCADUtils readCADUtils = new ReadCADUtils(); List<CADTextModel> cADTextList=readCADUtils.GetCADTextInfo(cadStirng); foreach (var item in cADTextList) { TaskDialog.Show("revit", item.Text+"\n"+"坐标原点为："+item.Location); } return Result.Succeed; }
2.获取CAD图元与文字信息的类
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using Autodesk.Revit; using Autodesk.Revit.DB; using Autodesk.Revit.UI; using CreatBridgeForRevit2018.ElementsSelect; using CreatBridgeForRevit2018.Filter; using Teigha.Runtime; using Teigha.DatabaseServices; using System.IO; using System.Collections; using Teigha.Geometry; namespace CreatBridgeForRevit2018.ReadCAD { class ReadCADUtils { static string dll = @"D:\Desktop\RvtToDwg\bin\Debug\TD_Mgd.dll";//手动指定引用dll路径 Assembly a = Assembly.UnsafeLoadFrom(dll); /// <summary> /// 取得链接cad的路径 /// </summary> /// <param name="cadLinkTypeID"></param> /// <param name="revitDoc"></param> /// <returns></returns> public string GetCADPath(ElementId cadLinkTypeID,Document revitDoc) { CADLinkType cadLinkType = revitDoc.GetElement(cadLinkTypeID) as CADLinkType; return ModelPathUtils.ConvertModelPathToUserVisiblePath(cadLinkType.GetExternalFileReference().GetAbsolutePath()); } /// <summary> /// 取得CAD的文字信息 /// </summary> /// <param name="dwgFile"></param> /// <returns></returns> public List<CADTextModel> GetCADTextInfo(string dwgFile) { List<CADTextModel> listCADModels = new List<CADTextModel>(); using (new Services()) { using (Database database = new Database(false, false)) { database.ReadDwgFile(dwgFile, FileShare.Read, true, ""); using (var trans = database.TransactionManager.StartTransaction()) { using (BlockTable table = (BlockTable)database.BlockTableId.GetObject(OpenMode.ForRead)) { using (SymbolTableEnumerator enumerator = table.GetEnumerator()) { StringBuilder sb = new StringBuilder(); while (enumerator.MoveNext()) { using (BlockTableRecord record = (BlockTableRecord)enumerator.Current.GetObject(OpenMode.ForRead)) { foreach (ObjectId id in record) { Entity entity = (Entity)id.GetObject(OpenMode.ForRead, false, false); CADTextModel model = new CADTextModel(); switch (entity.GetRXClass().Name) { case "AcDbText": Teigha.DatabaseServices.DBText text = (Teigha.DatabaseServices.DBText)entity; model.Location = ConverCADPointToRevitPoint(text.Position); model.Text = text.TextString; model.Angel = text.Rotation; model.Layer = text.Layer; listCADModels.Add(model); break; case "AcDbMText": Teigha.DatabaseServices.MText mText = (Teigha.DatabaseServices.MText)entity; model.Location = ConverCADPointToRevitPoint(mText.Location); model.Text = mText.Text; model.Angel = mText.Rotation; model.Layer = mText.Layer; listCADModels.Add(model); break; } } } } } } } } } return listCADModels; } /// <summary> /// 取得cad的图层名称 /// </summary> /// <param name="dwgFile"></param> /// <returns></returns> public IList<string> GetLayerName(string dwgFile) { IList<string> cadLayerNames = new List<string>(); using (new Services()) { using (Database database = new Database(false, false)) { database.ReadDwgFile(dwgFile, FileShare.Read, true, ""); using (var trans = database.TransactionManager.StartTransaction()) { using (LayerTable lt = (LayerTable)trans.GetObject(database.LayerTableId, OpenMode.ForRead)) { foreach (ObjectId id in lt) { LayerTableRecord ltr = (LayerTableRecord)trans.GetObject(id, OpenMode.ForRead); cadLayerNames.Add(ltr.Name); } } trans.Commit(); } } } return cadLayerNames; } /// <summary> /// 取得CAD里的线，包括直线、多段线、圆曲线 /// </summary> /// <param name="dwgFile"></param> /// <returns></returns> public List<CADGeometryModel> GetCADCurves(string dwgFile) { List<CADGeometryModel> listCADModels = new List<CADGeometryModel>(); using (new Services()) { using (Database database = new Database(false, false)) { database.ReadDwgFile(dwgFile, FileShare.Read, true, ""); using (var trans = database.TransactionManager.StartTransaction()) { using (BlockTable table = (BlockTable)database.BlockTableId.GetObject(OpenMode.ForRead)) { using (SymbolTableEnumerator enumerator = table.GetEnumerator()) { StringBuilder sb = new StringBuilder(); while (enumerator.MoveNext()) { using (BlockTableRecord record = (BlockTableRecord)enumerator.Current.GetObject(OpenMode.ForRead)) { foreach (ObjectId id in record) { Entity entity = (Entity)id.GetObject(OpenMode.ForRead, false, false); CADGeometryModel geoModel = new CADGeometryModel(); switch (entity.GetRXClass().Name) { case "AcDbPolyline": Teigha.DatabaseServices.Polyline pl = (Teigha.DatabaseServices.Polyline)entity; IList<XYZ> listPoints = new List<XYZ>(); for (int i = 0; i < pl.NumberOfVertices; i++) { listPoints.Add(new XYZ(MillimetersToUnits(pl.GetPoint2dAt(i).X), MillimetersToUnits(pl.GetPoint2dAt(i).Y), 0)); } PolyLine polyLine = PolyLine.Create(listPoints); listCADModels.Add(new CADGeometryModel() {CadPolyLine= polyLine,LayerName=pl.Layer }); break; case "AcDbLine": Teigha.DatabaseServices.Line line = (Teigha.DatabaseServices.Line)entity; Autodesk.Revit.DB.Line revitLine = Autodesk.Revit.DB.Line.CreateBound(ConverCADPointToRevitPoint(line.StartPoint), ConverCADPointToRevitPoint(line.EndPoint)); listCADModels.Add(new CADGeometryModel() {CadCurve=revitLine as Autodesk.Revit.DB.Curve ,LayerName=line.Layer}); break; case "AcDbArc": Teigha.DatabaseServices.Arc arc = (Teigha.DatabaseServices.Arc)entity; double enda, stara; if (arc.StartAngle> arc.EndAngle) { enda = arc.StartAngle; stara = arc.EndAngle; } else { enda = arc.EndAngle; stara = arc.StartAngle; } Autodesk.Revit.DB.Arc revitArc = Autodesk.Revit.DB.Arc.Create(Autodesk.Revit.DB.Plane.CreateByNormalAndOrigin(new XYZ( arc.Normal.X, arc.Normal.Y, arc.Normal.Z), ConverCADPointToRevitPoint(arc.Center)), MillimetersToUnits(arc.Radius), stara, enda); listCADModels.Add(new CADGeometryModel() { CadCurve = revitArc as Autodesk.Revit.DB.Curve, LayerName = arc.Layer }); break; default: break; } } } } } } } } } return listCADModels; } /// <summary> /// 毫米转化成英寸 /// </summary> /// <param name="value"></param> /// <returns></returns> private double MillimetersToUnits(double value) { return UnitUtils.ConvertToInternalUnits(value, DisplayUnitType.DUT_MILLIMETERS); } /// <summary> /// 将CAD里的点转化为Revit里的点 /// </summary> /// <param name="point"></param> /// <returns></returns> private XYZ ConverCADPointToRevitPoint(Point3d point) { return new XYZ(MillimetersToUnits(point.X), MillimetersToUnits(point.Y), MillimetersToUnits(point.Z)); } } public class CADTextModel { public XYZ Location { get; set; } public string Text { get; set; } public double Angle { get; set; } public string Layer { get; set; } public CADTextModel() { Location = null; Text = ""; Angle = 0; Layer = ""; } } }
原文地址：https://blog.csdn.net/helloyangkl/article/details/124859184
