AX 2012 R3 Visual Studio project C# parsing errors

Question

I am writing a wrapper for SSHnet dll from renci (https://sshnet.codeplex.com/), so I can fetch files from a sFTP server via Dynamics AX periodically.

When I catch errors in C# project for example in a try catch statement how can I parse the error message back to AX?

Options I thought of;

1. Should I put the error message in a string variable and read the string in Dynamics AX?

2. Write errors to the event log on the AOS / client?

Answer 1

The easiest way to pass error to AX is a rethrow it in C#

catch (Exception ex) 
{
    // Do special cleanup, logging etc.
    throw;
}

and catch it in AX

catch (Exception::CLRError)
{
     ex = ClrInterop::getLastException();
     if (ex != null)
     {
        ex = ex.get_InnerException();
        if (ex != null)
        {
            error(ex.ToString());
        }
    }
}