利用CAD的API怎么画一个带箭头的“引线”(Leader)？

gisgooddog

请问各位大虾：利用CAD的API怎么画一个带箭头的“引线”(Leader)？就像输入“Leader”命令一样。是不是和画直线，圆等实体一样的画法啊？有没有其它其它画带箭头直线的方法？

gisgooddog

我用的是以下这个方法，怎么没有反应？
         public static ObjectId DrawLeader(Point3d startPoint,Point3d endPoint)
        {
            ObjectId leaderId = ObjectId.Null;// The return value for this function
            Database db = HostApplicationServices.WorkingDatabase;//获得当前工作空间的数据库
            using (Transaction trans = db.TransactionManager.StartTransaction())
            {
                BlockTable bt =  trans.GetObject(db.BlockTableId, OpenMode.ForWrite) as BlockTable;
                BlockTableRecord btr = bt[BlockTableRecord.ModelSpace].GetObject(OpenMode.ForWrite) as BlockTableRecord;
                Leader leader = new Leader();// 标注线(带箭头)              
                leader.AppendVertex(startPoint);
                leader.AppendVertex(endPoint);
                lineId = btr.AppendEntity(leader);
                trans.AddNewlyCreatedDBObject(leader, true);
                trans.Commit();
            }
            return leaderId ;
        }

gisgooddog

这个方法是可以的，原来参数startPoint和endPoint设置有问题。一定要设置成New Point3d（X，Y，0）的形式才行。