问题
I'm writing a COM object in C# and I'd like to raise errors to vba/asp client software using the mechanism it understands - the Err object.
In good ol' days that would have meant implementing ISupportErrorInfo on the COM object but I can't find any information about how to implement that interface in a C# object.
Can anybody help?
thanks!
回答1:
You should be able to simulate this by throwing a custom exception from the Managed code. All CCW's automatically implement ISupportErrorInfo (Reference) and understand how to return error information for a thrown exception.
All you need to do is create a custom exception (if a current one does not suite you) and provide the appropriate HResult by setting the base Exception.HResult member.
来源：https://stackoverflow.com/questions/715073/implementing-isupporterrorinfo-on-a-c-sharp-object-exposed-to-com