Hello Friends, In this article, we will learn about NHibernate.
What is NHibernate?
- NHibernate is an open-source ORM(Object-Relational Mapping) framework.
- Designed to serve as a persistence layer exclusively for the .Net framework based on ORM Technique.
- A tool that makes a “virtual representation” of database objects inside the code. Used to solve the problem of impedance discrepancy between class and relational databases and tables.
Version History
| Versions | Year of Release | Description |
|---|---|---|
| NHibernate 1.0 | 2006 | It was mirrored as the features set of NHibernet 2.1 and NHibernate 3 |
| NHibernate 1.2.1 | 2007 | It introduced many more features from Hibernate 3 and support for .net 2.0, stored procedures, generics, and nullable types. |
| NHibernate 2.0 | 2008 | It is comparable to Hibernate 3.2 in terms of features. With the version 2.0 release, Nhibernate discarded support for .Net 1.1. |
| NHibernate 3.0 | 2010 | The 1st version to use .Net 3.5, with features such as:
|
| NHibernate 3.2 | 2011 | New features included as
|
| NHibernate 4 | 2014 | This version requires .NET Framework 4.0 or later. |
| NHibernate 5.0 | 2017 | It provides support for asynchronous programming |
| NHibernate 5.1 | March 2018 | It supports .NET Standard 2.0 and .NET Core 2.0 |
| NHibernate 5.2 | December 2018 | 157 issues were resolved in this release. |
| NHibernate 5.3 | 2020 | Latest release |
Databases Support
- MS SQL Server
- Windows Azure SQL Database OLE(Object Linking and Embedding)
- Oracle
- MySQL
- Postgres
What is Object-relational mapping?
It could be a method for making a layer to outline information among classes and social databases. This makes, in impact, a “virtual object database” that can be utilized from inside the programming language.
Object-Relational Mapping (ORM) is the arrangement to handle the jumbles as recorded underneath.
- The problem of Granularity: We can have more classes than database tables.
- The problem of Inheritance: A database does not support inheritance.
- The problem of Associations/composition: They cannot be easily represented in a database.
- The problem of Impedance mismatch: The mismatch between structural and data type representation in classes and databases.
Following Advantages of NHibernate
- Follow-through the object in the relation database and can do all CRUD operations in it.
- NHibernate Work with all the database work.
- Do away with the necessity to write SQL statements or create a stored query.
- Able to have all of our information get to logic contained within our application.
How To Get It?
This is the sources to download the NHibernate DLL are:
- NuGet.
- As a downloadable Zip package from SourceForge.
You can download the zip file from here, also you can install it from the package manager.
Install-Package NHibernate
If you have any questions or issues about this article, please let me know in the comment box.
