CAD下多线程怎么实现

obaby1221 · 发表于 2011-3-15 20:49:00

用access中的坐标在cad下成图，cad怎么实现多线程，网上搜了下cad先多线程要先在线程里加以下代码
      Database db = HostApplicationServices.WorkingDatabase;
         //获取当前文档所在的数据库
         Transaction trans = db.TransactionManager.StartTransaction();
         DocumentCollection docs = Autodesk..ApplicationServices.Application.DocumentManager;
         Document doc = docs.GetDocument(db);
         if (!doc.IsActive)
         {
            Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument = doc;
         }
         DocumentLock docLock = doc.LockDocument();
         try
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但是还是报致命错误