需要注册异常转换器.

在代码中:

configuration.SetProperty(
  Environment.SqlExceptionConverter,
  typeof(SqlExceptionConverter).AssemblyQualifiedName);

在配置文件中:

<property name="sql_exception_converter">
      Name.Space.SqlExceptionConverter, MyAssembly
</property>

我直到现在才尝试这个，只是在代码中查找.希望它有效，我也需要它:-)

I didn't try this until now, just looked in up in the code. Hope it works, I'll need it too :-)