尝试读取或写入受保护的内存

Rvpoo · 发表于 2013-9-13 16:03:00

try
         {
            Document doc = Autodesk..ApplicationServices.Application.DocumentManager.MdiActiveDocument;
            DocumentLock docLock = doc.LockDocument();
            ObjectId LastId = new ObjectId();
            string SelectId = dg_data.Rows[e.RowIndex].Cells[0].Value.ToString();
            string Rid = SelectId.Replace("(", "").Replace(")", "");
            Int64 Fid = Int64.Parse(Rid);
            IntPtr Sid = (IntPtr)Fid;
            ObjectId Id = new ObjectId(Sid);
            Database extDatabase = new Database(false,false);
            using (Transaction trans = extDatabase.TransactionManager.StartTransaction())
            {
                  try
                  {
                     if (LastId != null)
                     {
                        Entity Ent = trans.GetObject(LastId, OpenMode.ForRead) as Entity;
                        Ent.Unhighlight();
                     }
                  }
                  catch { }
                  Entity ent = trans.GetObject(Id, OpenMode.ForRead) as Entity;
                  if (ent.GetType().Name == "Line")
                  {
                     ent.Highlight();
                     //Line line = ent as Line;
                     //if (line != null)
                     //{
                     // line.StartPoint = new Point3d(0.0,0.0,0.0);
                     // line.EndPoint = new Point3d(0.0, 0.0, 0.0);
                     //}
                  }
                  LastId = Id;
                  //ent.TransformBy(Matrix3d.Displacement(new Vector3d(0, 0, 3)));//移动整个实体
                  trans.Commit();
            }
            docLock.Dispose();
         }
         catch { }
红色报错  尝试读取或写入受保护的内存。这通常指示其他内存已损坏。请高手帮忙看下~我想让实体闪烁Highlight
而且我想修改直线的 line.StartPoint = new Point3d(0.0,0.0,0.0);
                     // line.EndPoint = new Point3d(0.0, 0.0, 0.0);
不知道这样可不可以  求高手！！！