entity framework data access layer example

This article supporting source code This article uses the following techniques: LINQ to SQL, ADO. NET Entity Framework and SOA Directory To create a data access layer Persisting individual objects Tracking changes across service boundaries Configuring clients Summari

These two layers are actually the layers of most entity frameworks. For these two layers, you can refer to the dynamic and soft methods. Of course, you can also build them by yourself, you can also use the existing mature Entity Framework. However, for large projects or product projects, it is best not to use complex physical frameworks, because updates, maintena

the database operation context DbContext. Configuration.ProxyCreationEnabled = false; If it is set to false, the WCF Service can work normally, but other object sets in the object class objects are empty, that is, the reference content cannot be returned by WCF. At the same time, in the Entity Framework, this kind of Entity class runs through each

Below is the Administrator information table for the model layer In this model we used asp.net MVC data annotation and verification, can be used as backend verification, Entity Framework to the database mapping Using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Text; 5 using Sy

In the system architecture design, cache is the most common strategy to reduce database load and improve performance. The main purpose of cache is to reduce the numberReadOperation. But in different cases, we need to use different forms of cache. For example, if the data in the data table is static and does not change, it is very easy. We only need to load the

commonentity; 39} 40} 41} {copycode($('code27642_2'));}">Copy code 4. Implement the data access layerAfter completing the above work, we can implement the data access layer. With the support of the nbear framework, we can eas

Example wizard for getting started with ADO. NET Entity Framework (with demo program download) ADO. NET Entity Framework Getting started example wizard (with demo ProgramDownload) ADO. NET

Address: http://www.cnblogs.com/rdst/archive/2012/08/12/2634159.html Series Overview:The full series will detail the establishment of three layers of the abstract factory, as well as EF advanced applications and simple ASP. NET mvc3.0 applications. The technologies used include EF, lambda, LINQ, interface, and T4. Because many technical concepts are introduced online, the basic concepts are not described in this project. Series 2 Overview:This series details how to abstract t

When working with Entity Framework entities, most of the time we operate on entity model entities, a combination of database manipulation contexts that can be easily implemented using a variety of convenient means, such as LINQ, and everything looks good. However, if you consider using WCF, you may encounter a number of related traps or errors. Because the object

Series Overview:The full series will detail the establishment of three layers of the abstract factory, as well as EF advanced applications and simple ASP. NET MVC3.0 applications. The technologies used include Ef, Lambda, Linq, Interface, and T4. Because many technical concepts are introduced online, the basic concepts are not described in this project. Series 2 Overview:This series details how to abstract the common method (CRUD) and the application of T4 templates. 1. Create a Cnblogs. Rdst.

Active/passive state for the entity. Entities created for this reason, you can extend the Ipassivable interface to implement this functionality. The interface defines the properties of the IsActive. If the entity you created for the first time is marked as active, you can set the IsActive property value to True in the constructor. This is different from the soft deletion (isdeleted). If the

Before introducing the ORM framework, we will introduce the design of the data access layer. The data access layer is the basis of the ORM framewor