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如何处理C ++加载的C＃DLL中的异常

[英]how to handle exceptions in C# DLL loaded by C++

原文 2009-02-26 17:25:44 5 1 c#/ c++/ com/ exception-handling

I have a DLL that is created in C# for the purpose of providing a COM interface to a third-party C# library. 我有一个在C＃中创建的DLL，目的是为第三方C＃库提供COM接口。 I have a C++ program that uses that COM interface so that it can communicate with the C# library. 我有一个使用该COM接口的C ++程序，以便它可以与C＃库进行通信。 Sometimes, exceptions get thrown on the C# side and all I get back on the C++ side is an HRESULT from the COM invocation that says means "exception occurred" (or something to that effect). 有时，异常会在C＃端被抛出，而我在C ++端返回的所有内容都是来自COM调用的HRESULT，表示“异常发生”（或类似的东西）。 Is there any way for me to get the entire exception information so that I can print an informative message to my C++ app's log? 有没有办法让我获取整个异常信息，以便我可以在我的C ++应用程序日志中打印信息性消息？ If not, is there anything I can do on the C# side to intercept all exceptions before they trigger whatever mechanism returns the HRESULT to C++ so that I can log them on the C# side? 如果没有，是否有什么我可以在C＃端拦截所有异常，然后它们触发任何机制将HRESULT返回到C ++，以便我可以在C＃端登录它们？

1 个解决方案

There is a mapping of a managed exception to an HRESULT. 有一个托管异常到HRESULT的映射。 Consult the table in this MSDN article . 请参阅此MSDN文章中的表。 .NET retrieves error info from a COM object with IErrorInfo. .NET使用IErrorInfo从COM对象检索错误信息。 That might well work the other way around too. 反过来也可能相反。 Worth a shot. 值得一试。