entity framework data access layer example

respectively. In addition, however, the author needs to emphasize that Data Access logic The key features are not in the first two layers (DAF is a bit different, and the first two layers are very important), But in the real implementation of the specific data Access logic 3rd

Transactional Operations with database links var db = connectionhelper.getconn (connectiontype.write);//Get context var conn = db. connection;//Remove the database link Conn. Open ();//Turn on link using (var trans = Conn. BeginTransaction ()) Open transaction {Servicestationentities db = null;db = new Servicestationentities ((entityconnection) conn);Then do it. Trans.commit (); }

! Whatever technology is used, this is always the most crucial step: at least, the author thinks so. After the adoption of DAF solution, in fact, the specific use of what data access logic technology is not necessary special care, as long as the interface to determine, even a lot of historical problems can be easily resolved! Ø Access Technology arbitrar

= "Accountcontext", the value of the database connection name is consistent with the previous context-dependent database connection name. 1 2 "accountcontext" connectionstring="Data source=.; Database=mvcdemo;uid=sa;pwd=sunfast; " providername="System.Data.SqlClient"/> 3 4. Run the project, the database will be created automatically, the database file is placed by default in SQL Server installation directory, the database will create more than

A long time ago, after publishing an article titled design of the persistent data layer framework (I), many people are paying attention to it. Now, a slightly complete test version of release has been released to provide the DLL, see the configuration instructions. You are welcome to experience and provide valuable suggestions. The following is an

Access | Data L Introduction Since. NET really went into the developer's Day, "efficiency" two words has been a topic that many programmers relish. Whether it's from development mode (Cross Language), the system framework (. NET framework), or a variety of easy-to-use tools (vs.net), none of this reflects its victory.

Before you learn this, take a look at the DataTable data shown in the MVC application http://www.cnblogs.com/insus/p/3361182.html, which shows the DataTable on the MVC view.Insus.net now uses the non-Entity Framework to display data on the view view. Just modify it on the basis of it.First remove the following class fr

record and see person = = = = (Context = stored in the database is 1, not what we want 12345678. What is this for? Because the primary key is SocialSecurityNumber is the int type, Code first does the self-growth processing of the column in the database. At this point, we would like to insert a custom socialsecuritynumber. So when we want to do this, we should configure the SocialSecurityNumber self-growth to none. SocialSecurityNumber {;FirstName {; LastName {; If the attribute is identifi

repeatedly stressed that the bottleneck is not in the database interaction stage. To avoid repeated meaningless comments, you may need to use Profiler to track the problem. I have long heard that EF has a poor performance. I didn't expect it to be really bad, and it's not so bad, bloggers who do not know the truth are calm ). Those who have applied EF in the project should be careful when there is a picture and a truth! 1. NET4.0, EF4.4 1 public void ExecRealTimeRun (List Simple. There is redu

. springtestdbunit. annotation. DatabaseSetup;Import com. noyaxe. myapp. entity. Floor;Import org. junit. Test;Import org. springframework. beans. factory. annotation. Autowired;Import org. springframework. test. context. junit4.SpringJUnit4ClassRunner;Import org. springframework. test. context. support. DependencyInjectionTestExecutionListener;Import org. springframework. test. context. support. DirtiesContextTestExecutionListener; Import java. util.

12345678. What is this for? Because the primary key is SocialSecurityNumber is the int type, Code first does the self-growth processing of the column in the database. At this point, we would like to insert a custom socialsecuritynumber. So when we want to do this, we should configure the SocialSecurityNumber self-growth to none. public class person { [Key, Databasegenerated (databasegeneratedoption.none)] public int SocialSecurityNumber {get; set;} public string Firs

Access to | Data code 4: Data Entity in my data entity–2,framework Dafbase: Provides the basic data e