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
标签：包与,arc,Teigha,database,源码,new,二次开发,using,Revit From： https://www.cnblogs.com/mqxs/p/17280954.html