如何编组 C# 中的列表

Question

I have to send a list from C# to C++.The C# list is List<string>MyList and the C++ code accepts it as list<wstring>cppList .How to use marshalas for this.

Thanks

Answer 1

C# cannot P/Invoke complex C++ types. You will have to use C++/CLI, they might have a method for marshalling it across. Else, you will have to marshal each string across individually.

Answer 2

It is always wiser not to use complex type marshaling between native code and managed code. In case of List , these type totally differ from each other as they have different memory layout for each item.

So the best way is to write a utility function in a native dll that accepts array of string(char*) and manually build your native List and ultimately call the desired method. It is easy for your to create wrapper of that utility function.

Answer 3

strings in C# are wstrings (2 byte unicode strings), so if what you say is true, then no special conversions are necessary.