Data Access Layer
The customer repository inherits the base repository and uses the data mapper instance for object creation. All the CRUD procedures defined in the first post of this series are called in this class. The query for accessing and persisting data in the relational model is formed in the Customer repository. protected override BaseMapper < Customer , long > Mapper get if (___Mapper == default ( CustomerMapper )) ___Mapper = new CustomerMapper ( "CustomerIntId" );
The GOF Template pattern coupled with .NET 2.0 Framework generics provides an awesome synergistic alliance. This article demonstrates how to drastically reduce the amount of code required in building a data access layer. Less code to debug... less code to break... less code to maintain... what could be better?
A Data Access Layer is an important layer in the architecture of any software. This layer is responsible for communicating with the underlying database. Making this layer provider independent can ensure multi database support with ease. This article discusses implementation of a provider independent Data Access Layer in C#.
Interfaces + Factory pattern = Decoupled architecture Introduction In this tutorial we will try to understand how we can use interfaces and factory pattern to create a truly decoupled architecture framework. In this sample we will take up a simple three tier architecture and apply interfaces and factory pattern to see how we can transform the three tier in to a truly decoupled architecture. For past some days I have been writing and recording videos in design patterns, UML, FPA, Enterprise blocks and lot you can watch the videos at http://www.questpond.com/
The latest ADO.NET evolution focuses on raising the level of abstraction from the logical (relational) level to the conceptual (entity) level. For this purpose Microsoft introduces the Entity Framework , designed to simplify data - object conversion and embed data access queries into program code. The Devart dotConnect product line supports the ADO.NET Entity Framework for Oracle, MySQL, PostgreSQL, and SQLite.
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NHibernate is an object-relational mapping (ORM) solution for the Microsoft .NET platform: it provides a framework for mapping an object-oriented domain model to a traditional relational database . Its purpose is to relieve the developer from a significant portion of relational data persistence -related programming tasks. NHibernate is free as open source software that is distributed under the GNU Lesser General Public License . NHibernate is a port of the popular Java O/R mapper Hibernate to .NET. [ edit ] Feature summary NHibernate's primary feature is mapping from .NET classes to database tables (and from CLR data types to SQL data types).