cast the native pointer to managed object

Question

I need to convert unmanaged pointer to the managed object. Below is the code

Wrapper.cpp

 _declspec(dllexport) int UnmanagedAlgebraComputation::SubtractMultiplyWrapper(UnmanagedSubtraction *unmanagedSubtraction)
{
     AlgebraCSharp::AlgebraComputation^ obj= AlgebraCSharp::AlgebraComputation::GetObject;
     return obj->Subtraction(unmanagedSubtraction);
 }

Here UnmanagedSubtraction, UnmanagedAlgebraComputation is the class in my Wrapper.h file.

SubtractMultiplyWrapper(UnmanagedSubtraction *unmanagedSubtraction) is the method in my wrapper.h file which is implemented in my Wrapper.cpp file.

The problem is I want to pass the managed object to the obj->Subtraction(unmanagedSubtraction) but unmanagedSubtraction is my native C pointer.

It throws the error as

'AlgebraCSharp::AlgebraComputation::Subtraction' : cannot convert parameter 1 from 'UnmanagedSubtraction *' to 'AlgebraCSharp::SubtractComputation ^'

Please let me know if you have any solution related to this.

Medinoc Medinoc · Accepted Answer · 2013-06-05T14:27:45

You can't cast: You must either convert (copy the relevant contents into a managed object) or wrap (have one object be a wrapper around the other).

cast the native pointer to managed object

2 Answers