未处理的非法访问读异常（插入影像图代码）

news2025/1/16 13:52:59

本文迁移自本人网易博客，写于2013年1月5日，未处理的非法访问读异常（插入影像图代码） - lysygyy的日志 - 网易博客 (163.com)

Acad::ErrorStatus CustomApplication::createAcDbRasterImageDef (AcDbObjectId & parObjectId,

ACHAR * parImageName, ACHAR * parImagePath)

{

// declaration

Acad::ErrorStatus ErrorStatus;

AcDbObjectId DictionaryId;

AcDbDictionary* pDictionary;

Adesk::Boolean bNameInUse;

// Create new image def object

AcDbRasterImageDef* pAcDbRasterImageDef = new AcDbRasterImageDef;

if (pAcDbRasterImageDef == NULL)

return Acad::eNullObjectPointer;

ErrorStatus = pAcDbRasterImageDef->setSourceFileName(parImagePath);

if (ErrorStatus != Acad::eOk)

{

ads_printf(_T("Error: Could not find the image file.\n"));

delete pAcDbRasterImageDef;

return ErrorStatus;

}

ErrorStatus = pAcDbRasterImageDef->load();

if (ErrorStatus != Acad::eOk)

{

ads_printf(_T("Error: Could not open the image file.\n"));

delete pAcDbRasterImageDef;

return ErrorStatus;

}

DictionaryId = AcDbRasterImageDef::imageDictionary(acdbHostApplicationServices()->workingDatabase());

if (DictionaryId.asOldId() == 0)

{

ErrorStatus = AcDbRasterImageDef::createImageDictionary(acdbHostApplicationServices()->workingDatabase(), DictionaryId);

if (ErrorStatus!= Acad::eOk)

{

delete pAcDbRasterImageDef;

return ErrorStatus;

}

ErrorStatus = acdbOpenObject((AcDbObject*&)pDictionary, DictionaryId, AcDb::kForWrite);

if (ErrorStatus != Acad::eOk)

{

delete pAcDbRasterImageDef;

return ErrorStatus;

}

bNameInUse = pDictionary->has(parImageName);

if (!bNameInUse)

ErrorStatus = pDictionary->setAt(parImageName, pAcDbRasterImageDef, parObjectId); //这一行时崩溃，unhandled access violation reading 0x0054 exception at 64554c66h

else

{

pDictionary->close();

delete pAcDbRasterImageDef;

return Acad::eHandleInUse;

}

pDictionary->close();

pAcDbRasterImageDef->close();

return ErrorStatus;

}

查了两天，最终发现问题在于：加载影像图之前必须先加载模块 acismobj17.dbx，而我原来的工程中可能是加载其他模块时将该模块自动加载了，另外Autocad自带的附着图像功能也将该模块加载进去了，命令 imageAttach，回车，弹出选择文件对话框之前，就先加载了两个模块： acismobj17.dbx 和 acismui.arx。所以在测试的时候只要选了附着图像的命令，再调用我的自定义命令，就不会出错了。