I have placed User class from QuickStart tutorial in App_Code folder and User.hbm.xml too.

In my test page I wrote:


And I become Exception:

Exception Details: NHibernate.MappingException: No persisters for: User

Source Error:


Line 33:
Line 34: // Tell NHibernate that this object should be saved
Line 35: session.Save(newUser);
Line 36:
Line 37: // commit all of the changes to the DB and close the ISession

Does not ASP 2.0 compile Entity.hbm.xml files to App_Code assembly?

Did you read this post:

NHibernate.MappingException: No persisters for

Did you find an answer to this problem? I am having the same problem and can only get my code to work if I manually load the mapping files with a call to config.AddXmlFile using a hardcoded path to my mapping files.

Thanks

Steve

+1

I am having the same problem with:

Microsoft Visual Studio 2005
Version 8.0.50727.7 (RTM.050727-0700)
Microsoft .NET Framework
Version 2.0.50727

if I manually load the hbm.xml files (with config.AddXmlFile("fullpath\*.hbm.xml")) it works - otherwise I get:
NHibernate.MappingException: Unknown entity class:

I have put the hbm.xml files in the App_Code directory (not much choice in a Website project) and they are flagged as "include in project".

I assume that you meant "Embedded Resource"

Anyway, check the advises here:
NHibernate.MappingException: No persisters for
(set the DEBUG mode, check for typo, ...)

And you can use a tool like ILDAsm to inspect your assembly and make sure that the hbm.xml mapping files are here.

I can't seem to find a way to set the build action to "Embedded Resource" in Visual Studio 2005 Website project. It is not under the file properties.

There is no longer an embedded vs linked option. They have removed that in favor of embedding everything in the App_Code folder. But the hbm.xml files do not show up in the App_Code assembly even when they are in the App_Code folder. This must be a bug.

have anyone get a solution to this problem. I want to use asp net 2 with nhibernate but it has this problem, it can't load the xml file into assembly.

thanks.

I was able to load the .hbm.xml files as a resource somehow. I forget exactly how. I think I iterated through the resources in the currently executing assembly. But it doesn't matter anyways.

Even when you do manage to load the .hbm.xml files in an ASP.NET 2.0 project, it won't work. The name of the assembly changes each time you recompile. :(

The simple solution to all of this is to keep your object model classes and related .hbm.xml files as a seperate class library project. You then add a project reference to your web project, and all is good. You leave the .hbm.xml files as embedded resources, since that still works with Class Library projects. It's a better development practice anyhow.

I don't think you are going to be able to do it using the App_Code directory. That is for source code that is compiled on the fly.

Add a class lib project to your solution. Put your domain object classess and mapping files in this project. Reference this project from your Web Site "project".

I'm not sure if you can do this if you are using Web Developer Express. (It is only for web sites.) If not you can use C#/VB Express to create and build your domain assembly. You can reference the DLL from your Web Site in VWD Express.

BOb

I took this suggestion, and put all our hbm.xml mappings as embedded resources ( Set the( properties) build action to embedded resource) into a .dll which is deployed with our website to a .bin directory.

there seemed to be a big problem with reading these embedded resources (it used to just work, when we were using nhibernate version 0.7?)

I had to write this code to get it working again,

Configuration cfg = new Configuration();
Assembly assm = System.Reflection.Assembly.GetExecutingAssembly();
ResourceManager Rm = new ResourceManager("",assm);
string [] names = assm.GetManifestResourceNames();
foreach (string name in names)
{
if(name.EndsWith("hbm.xml") )
{
Stream XmlInputStream = assm.GetManifestResourceStream( name );
XmlTextReader reader = new XmlTextReader(XmlInputStream);
cfg.AddXmlReader(reader);
}
}
factory = cfg.BuildSessionFactory();

There may be many better ways to do it...I just stopped on the first one that worked.


By the way, I have been using Nhibernate with asp.net 2.0 for about 10 months now, with very few issues.