yang686526

请各位高手、网友帮我一下吧。。。
www.dimcax.com
请各位高手、网友帮我一下吧。。。
请代码重新贴一下，
c#最适合开发autocad，因为它拥有vb容易的特点，却具有vc++的强大功能。
dim trans as transaction = db.transactionmanager.starttransaction dim bt as blocktable = trans.getobject(db.blocktableid, openmode.forread) dim btr as blocktablerecord = trans.getobject(bt("*model_space"), openmode.forwrite) '(blkcreate("aa").objectid, openmode.forwrite), p as point3d = point3d.origin, ids as objectidcollection = new objectidcollection dim p as point3d = point3d.origin, ids as objectidcollection = new objectidcollection dim pl as polyline = pljxcent(p, 5000, 8000) '--在模型空间画矩形 ids.add(pl.objectid)
因为你的多义线pl还没有添加到"*model_space", 所以你的代码ids.add(pl.objectid)会发生错误，因为pl.objectid这时候是无效的id号。
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