[Mono-bugs] [Bug 496138] [PATCH] Mono not converting native COM exceptions (HResults) to C# Exceptions correctly.

bugzilla_noreply at novell.com bugzilla_noreply at novell.com
Thu Jun 4 17:54:39 EDT 2009


User tom_hindle at sil.org added comment

--- Comment #4 from tom hindle <tom_hindle at sil.org>  2009-06-04 15:54:39 MDT ---
The final thing to do in the GetExceptionForHr method is to use the optional
COM object IErrorInfo, to provide better Error information to the ComException.

something like:

string desc = String.Empty;
if (errorInfo != IntPtr.Zero)
    object o = Marshal.GetObjectForIUnknown(errorInfo);
    IErrorInfo i = mErrorInfo as IErrorInfo;
    if (i != null)

if (errorCode < 0)
    return new COMException (desc, errorCode);
return null;

However we don't have a IErrorInfo interop defined in mono,
msdn suggests its in namespace Microsoft.VisualStudio.Shell.Interop in dll:

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