What is NHibernate ?

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1.00/5 (1 vote)

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Hello there ,

Im going to do project in NHibernate technology.Can you tell me what is NHibernate ? and why we prefer Nhibernate ? What is its purpose ?
im confusing with SQL Queries on NHibernate . So can you people explain briefly about session factory etc in NHibernate .

Also Can you give me sample project code

Thanks in Advance

wincy edwin

Posted 28-Apr-11 19:47pm

itsmecoder

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walterhevedeich 29-Apr-11 1:50am

Have you searched google about this? Typing nhibernate in google will produce 1,870,000 results. I suggest you do your homework of reading first and start creating your code, and then post questions when you encounter problems.

Sergey Alexandrovich Kryukov 29-Apr-11 1:58am

For this case, I have my standard advice, please see my answer.
--SA

walterhevedeich 29-Apr-11 2:25am

Ahh.. the famous standard advice of SA. Yeah I've seen it somewhere before. Im giving it a 5. Perhaps you should give a name to it, something similar to RTFM for example? :)

Sergey Alexandrovich Kryukov 29-Apr-11 2:40am

Thank you, Walter (excuse me, do I use correct name?)
Good idea, by the way -- thank you. I modify the text mocking the form of the question.

As to RTFM, Read The Following Manual :-) -- Microsoft Q209354:
http://radio-weblogs.com/0001263/junk/Q209354 - HOWTO.html
--SA

walterhevedeich 29-Apr-11 2:49am

Your'e welcome, and, yes you are using the right name. Good job of giving a more decent meaning to RTFM. :)

Sergey Alexandrovich Kryukov 29-Apr-11 2:52am

Thank you, Walter.
--SA

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Sergey Alexandrovich Kryukov · Answer 1 · 2011-04-28T19:57:00

Solution 1

The Question in not completely incorrect, but can be greatly improved. You should have re-formulated it:

"What are Wikipedia, Google, CodeProject and StackOverflow.com?"

If you asked and got good Answers, the Questions like your original one would not be needed!

—SA

Posted 28-Apr-11 19:57pm

Sergey Alexandrovich Kryukov

Comments

Joan M 29-Apr-11 2:41am

You've missed the pretty BING! :O

Nice standard answer... :-D

Sergey Alexandrovich Kryukov 29-Apr-11 2:48am

Thank you, but Bing is still struggling to earn my credit.
--SA

Joan M 29-Apr-11 2:51am

^^

Mahendra.p25 · Answer 2 · 2011-04-28T19:58:00

Solution 2

i think you need this

Click[^]

Posted 28-Apr-11 19:58pm

Mahendra.p25

Ramalinga Koushik · Answer 3 · 2011-04-28T20:01:00

Solution 3

Hope NHibernate Best Practices with ASP.NET, 1.2nd Ed.[^] article from CP might help you.

Posted 28-Apr-11 20:01pm

Ramalinga Koushik

Comments

Sergey Alexandrovich Kryukov 29-Apr-11 2:50am

Good... practices, a 5.
--SA

[no name] 29-Apr-11 4:39am

Thanks SAKryukov..

Rajesh Anuhya · Answer 4 · 2011-04-28T20:44:00

Solution 4

GO through the below link ..,

How Fire was invented?[^]

Posted 28-Apr-11 20:44pm

Rajesh Anuhya

Comments

Sergey Alexandrovich Kryukov 29-Apr-11 2:50am

Ha-ha! Thank you for the snow! Get my 5.
--SA

Don Jomar Hombrebueno 30-Jun-11 9:22am

i like this one!!!

Pratik Bhesaniya · Answer 5 · 2011-04-28T21:15:00

"NHibernate is an ORM, or Object-Relational Mapper. In the same line as LINQ to SQL, Entity Framework, LLBLGen, and others, ORM tools remove most of the need to write stored procedures to handle common data access (CRUD) for your business objects. ORM tools require that you create (either manually or with a visual designer...depends on the one you choose) a mapping specification that traces which properties of your objects map to which columns of your tables and/or views in your database. When you need to retrieve objects, the ORM tool generates the appropriate SQL for you, and sends it to the database. When the time comes to update your objects, the ORM will not only create the SQL to insert, update, and delete for you...it will also batch those commands so that a single connection and batch of commands are sent to the database and performs the whole thing in a transaction. ORM tools can also improve the efficiency of your queries by allowing you to select entire object graphs in a single go, generating the most efficient SQL for the task.
With ORM tools, you still need to query, however you either with basic methods on the ORM's context or session object, or with a custom query language for that ORM. These days, most ORM's, including NHibernate, also provide LINQ support, allowing you to use standard LINQ syntax to query your object model, which in turn is translated to SQL queries against your database for you.
The benefit of OR mappers is that you centralize almost ALL of your code into your domain, rather than splitting it between domain and stored procs. You lighten the stored procedure load on your database, providing less of a barrier to refactoring your database if the need ever arises, providing greater business agility not only in your domain, but also with your database schema. Since you don't have to write SQL, and especially if you use LINQ, you can often create a more efficient application in less effort with lower long term maintenance costs.
Aside from the inevitable war with your DBA's (if you have them), OR mappers can bring considerable benefits to the table that can reduce implementation effort, improve maintainability, and provide greater business agility."

For Sample Application refre below link,
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I Hope it will help you.

What is NHibernate ?

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