How to get the array of struct with “byte array” from WinRT C++ to C# in Windows Store app?

Question

Here I have a C# metro app with a C++ WinRT component. I need to do something in WinRT, like assign a photo\'s name/path, and retrieve photo\'s thumbnail.

First, I w

Answer 1

The following array types can be passed across the ABI:

1. const Platform::Array^,
2. Platform::Array^*,
3. Platform::WriteOnlyArray,
4. return value of Platform::Array^.

A value struct or value class can contain as fields only fundamental numeric types, enum classes, or Platform::String^.

So you cannot use a value struct with arrays. And you cannot use arrays of uint8[] type.

You should pass arrays and structs separately or by using a ref class.