设为首页收藏本站

晓东CAD家园-论坛

 找回密码
 立即注册

QQ登录

只需一步,快速开始

扫一扫,访问微社区

查看: 127|回复: 0

[其他] AcDbObjectId == Operator Causes Crash in Mixed Managed /CLR code

[复制链接]

已领礼包: 40个

财富等级: 招财进宝

发表于 2021-1-21 00:07:52 | 显示全部楼层 |阅读模式

马上注册,结交更多好友,享用更多功能,让你轻松玩转社区。

您需要 登录 才可以下载或查看,没有帐号?立即注册

x
AcDbObjectId == Operator Causes Crash in Mixed Managed /CLR code

问题:

Any use of the == operator with AcDbObjectId causes a crash in my AutoCAD 2005 or AutoCAD 2006 code.  What can I do to avoid this?  Example:

AcDbObjectId ida, idb;

if(ida == idb)

acutPrintf(_T("Ids Match!"));

解答:

The problem with this code is that the managed compiler has a forward declaration of the class which AcDbObjectId wraps called AcDbStub, which it does not have a managed definition for - but links with an unmanaged module that does.  From MSDN:

"...can occur when there is only a forward declaration for a type in an MSIL module (compiled with /clr), where the type is referenced in the MSIL module, and where the MSIL module is linked with a native module that has a definition for the type."
The quick solution for this is to give the managed code a dummy definition for this wrapped type by adding:

class AcDbStub {};

in your CPP code before the code you use the comparison with.

论坛插件加载方法
发帖求助前要善用【论坛搜索】功能,那里可能会有你要找的答案;
如果你在论坛求助问题,并且已经从坛友或者管理的回复中解决了问题,请把帖子标题加上【已解决】;
如何回报帮助你解决问题的坛友,一个好办法就是给对方加【D豆】,加分不会扣除自己的积分,做一个热心并受欢迎的人!
您需要登录后才可以回帖 登录 | 立即注册

本版积分规则

QQ|申请友链|小黑屋|手机版|Archiver|辽公网安备|晓东CAD家园 ( 辽ICP备15016793号 )  

GMT+8, 2021-3-5 14:48 , Processed in 0.107871 second(s), 11 queries , Gzip On, WinCache On.

Powered by Discuz! X3.4

Copyright © 2001-2020, Tencent Cloud.

快速回复 返回顶部 返回列表