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		几何尺寸与公差论坛------致力于产品几何量公差标准GD&T (GDT:ASME)\|New GPS(ISO)研究/CAD设计/CAM加工/CMM测量 » 仿射空间：CAX软件开发（三）二次开发与程序设计 » CAD二次开发 » SolidWorks二次开发
Earl,how to resolve the error as "Unable to read write-only property"?

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2007-05-20, 09:47 AM	#1
yogy 高级会员注册日期: 06-11 帖子: 1527 精华: 15 现金: 6353 标准币资产: 6353 标准币	Earl,how to resolve the error as "Unable to read write-only property"? Q: Subject: Earl,how to resolve the error as "Unable to read write-only property"? SR:1-407938223 Dear, Thanks. But, I get an error as “Unable to read write-only property” when add a call to body.EnumFaces. How to resolve the error? My code as fllows: LPUNKNOWN pFaces = NULL; pFaces = swBody.EnumFaces(); LPDISPATCH dFaces = NULL; pFaces->QueryInterface(IID_IDispatch, (LPVOID)&dFaces); Sence: SW API OLE & VC++ Yogy

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2007-05-20, 09:48 AM	#2
yogy 高级会员注册日期: 06-11 帖子: 1527 精华: 15 现金: 6353 标准币资产: 6353 标准币	回复: Earl,how to resolve the error as "Unable to read write-only property"? R: Hello, Ah. It looks like you are using the older swdisp.h and swdisp.cpp interfaces for SW. In that case, you might look at using: #import “sldworks.tlb” raw_interfaces_only LPDISPATCH pDisp = swBody; SldWorks::IBody2 comBody; pDisp->QueryInterface(__uuidof(SldWorks::IBody2), (LPVOID)&comBody); SldWorks::IEnumFaces2 *comEnumFaces; comBody->get_IEnumFaces(&comEnumFaces); // … do your work… This will allow you to get to the COM version of the object and work with it directly. Be sure to call the object’s Release() method when done with each object. Regards, -Earl

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