2016-03-01 15:49 GMT+00:00 Steve Lyle <ssl...@gmail.com>:
> This line of code:
> cfg.AddFile(@"C:\Users\slyle\Documents\Visual Studio
> 2015\Projects\Cat\Cat\Models\Cat.hbm.xml");
>
> Throws this error:
> An exception of type 'NHibernate.MappingException' occurred in
> NHibernate.dll but was not handled in user code
>
"not handled in user code" tells us that you haven't implement code to
properly catch and PRINT the exception information.
> Additional information: Could not compile the mapping
> document: C:\Users\slyle\Documents\Visual Studio
> 2015\Projects\Cat\Cat\Models\Cat.hbm.xml
>
I'm not sure what produces that line, but it's not the full information
that NHibernate generates.
>
> Why?
> It is as if AddFile() can't find *C:\Users\slyle\Documents\Visual Studio
> 2015\Projects\Cat\Cat\Models\Cat.hbm.xml*
> In fact, if I intentionally inject a typo in the path to the file I get
> the same error.
>
That is just a guess, because you don't show the full error message. It
could very well be "file not found" in one case and some syntax error in
the mapping file in the other case. Like I wrote in the other thread you
MUST look at the type and message of ALL InnerExceptions. The property
Exception.InnerException is a very fundamental concept in understanding
.Net expections, sadly many seem to miss this and only read the outer
exception text. Generally the top-most exception will indicate what
high-level operation failed, while the InnerExceptions will gradually
reveal more detail on what exactly went wrong.
I've checked the NHibernate source code, and there appears to be exactly
TWO places where a MappingException is thrown with the "Could not compile
the mapping document"-message. In both cases, the exception is thrown using
code similar to this:
catch (Exception e)
{
var message = documentFileName == null
? "Could not compile deserialized mapping
document."
: "Could not compile the mapping document:
" + documentFileName;
LogAndThrow(new MappingException(message, e)); // <---
Notice here how the underlying exception is passed along.
}
And it is the exception "e", which will show up as InnerException on the
MappingException, and this will tell you in more detail what exactly went
wrong.
Hint - your code should look like this:
try
{
your configuration and mapping code goes here
}
catch (Exception ex)
{
// ex.ToString() will recursively include the message and stacktrace
from all inner exceptions.
// Assuming your program runs from a command prompt.
// Alternatively, put a breakpoint on the next line and explore the
// excepton and inner exceptions with the Visual Studio exception
helper.
Console.WriteLine(ex.ToString());
Console.ReadLine();
}
> However this line of code, immediately preceding AddFile(), doesn't have
> any problems.
> cfg.Configure(@"C:\Users\slyle\Documents\Visual Studio
> 2015\Projects\Cat\Cat\Models\hibernate.cfg.xml");
> I also find if I define the configuration in Web.config then there isn't
> any trouble.
> If I don't include the path-file literal in Configure() then the
> hibernate.cfg.xml file will successfully be searched for and found in the
> bin\ folder ~ kind of as a undocumented default.
> But <mapping>.hbm.xml file/s are not afforded the same bin\ folder
> courtesy.
>
> Understand this is code from the "QuickStart" taken right off of the
> nHibernate website
> and I have literally tried to many ways to get this to work that I'm
> resorting to you, my 4th level of support.
>
> I understand by documentation and by construction nHibernate
> confguration() has about 12 different ways to load mappings.
> And I'd like to believe if one works then all others will work alike.
> Personally I believe the "Embedded Resource" option is contrary to
> flexibility and therefore contrary good application management.
> Sadly, the "Embedded Resource" option seems to be the only way to make
> nHibernate work.
>
Let's find the real problem before jumping to conclusions.
> And worse than all this is poor error reporting.
>
NHibernate _generates_ a lot of debug and error information. The error
_reporting_ is up to you as application developer - NHibernate can't know
if you want to stick it in a log file, show a dialog, print to console, or
whatever. However, NHibernate will log everything to log4net, so you can
just enable that in your project to get very extensive information (see my
reply in your other thread).
/Oskar
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