entity framework 6 0

This essay list:1. Foreign key Column name default convention2, one-to-many relationship3. One-to-one relationship4. Many-to-many relationships5. A one-to-many reflexive relationship6. Many-to-many reflexive relationshipsIn a relational database, it is not always the case that all the tables exist separately, but they are related to each other. There can be a foreign key dependency between two different tables, and a table can have a reflexive relationship (a field in the table refers to a prima

This essay list:1. Foreign key Column name default convention2, one-to-many relationship3. One-to-one relationship4. Many-to-many relationships5. A one-to-many reflexive relationship6. Many-to-many reflexive relationshipsIn a relational database, it is not always the case that all the tables exist separately, but they are related to each other. There can be a foreign key dependency between two different tables, and a table can have a reflexive relationship (a field in the table refers to a prima

So far, applications have been running on local IIS Express. If you want someone to access your application over the Internet, you must deploy it to a Web server and deploy the database to the database serverThis article will teach you how to use the very valuable two features of the entity Framework 6 when deploying your application to a cloud environment: elast

developers to use entity model designer to design EDM. EDM can also be edited by notepad or text editor. Derivative Service Primary entry: Ado. NET data services Ado. NET Entity Model Designer Microsoft develops an ado-based solution for various applications on the network, such as Ajax, Silverlight, and mashup applications. the service on the Net Entity

many other people's experiences and shared experiences. Coupled with my own innovative understanding, I certainly have something to do with, so I have the right to deepen my understanding, learn with everyone. Some articles for Reference 1. performance problems found by WCF and Entity framework Http://www.cnblogs.com/GaryChen/archive/2010/02/06/1664912.html 2. Code-First, Model-First, and Database-First mo

) poses a security risk.Add an error message to the views\student\delete.cshtmlTo run the project, click on the Students tab and click on one of the student's delete links:Click Delete and you will see that the student has been deleted in the index page.5. Ensure the database connection is closed at a timely timeTo ensure that the database connection is properly shut down and free of resources, you must destroy the database context when you are finished using it, which is why the

to better support test-driven development and domain-driven development. In fact, the idea of POCO is introduced from Java, which is not nice to say. Many of the good ideas in C # are introduced from Java. Here I am neutral. You can check POJO if you like. 4,LINQ to Entities Supports Language Integrated Query (LINQ) to query object types defined in the conceptual model. 5. ObjectContext The definitions of ObjectContext on the Internet are many words, and it seems that they want to vomit bloo

Original article name: Entity Framework 4.1: Optimistic Concurrency (6) Address: http://vincentlauzon.wordpress.com/2011/04/17/entity-framework-4-1-optimistic-concurrency-6/We can see the English tutorial recommended for

The school data model was completed in the previous article, and you will then learn how to read and display the relevant data-this is the data that the Entity Framework loads into the navigation properties.is done after thedelay, pre-and display loading related dataThe Entity Framework can load data into the navigatio

yet launched a similar framework, and still relies on ado.net, the traditional data access tool. It is estimated that Microsoft also heard complaints from programmers, so from a objectspace (ObjectSpace) from one to 2005 years early. Proposed that the concept of the application being able to connect to and access the database in a fully object-based way, with a technical concept similar to that of NHibernate, was finally released in 2008 Ado.net

= "Charlie chu", email = "[email protected]", Bio = "I am Chalrie chu."}); var count = db. SaveChanges (); Console.WriteLine ( "{0} Records saved to database", count); Console.WriteLine (); Console.WriteLine ("All Users in Database:"); foreach (var user in db. Users) {Console.WriteLine ("-{0}", user. Name); } } }} 1 2

DBAs prefer to use stored procedures for database access. In earlier versions of the Entity Framework, you could use stored procedures to retrieve data from raw SQL queries, but you cannot use stored procedures in update operations. In Entity Framework 6, you can configure

2 where c.IsMoreThan30DaysInArrears 3 select new { 4 Customer = c, 5 Orders = c.Orders.OrderByDescending( 6 o => o.OrderDate 7 ) 8 }; This statement uses the standard LINQ syntax to request an anonymous iteration consisting of the customer and all the orders sorted by it.

(); Using ( Entitycommand Cmd = New Entitycommand ( "Select value c from northwindentities. MERs as C" , Con )){ Entitydatareader Reader = cmd. executereader (Commandbehavior . Sequentialaccess ); While (Reader. Read ()){ Console . Writeline ( "Id [{0}], contacttitle [{1}]" , Reader [ "Customerid" ], Reader [ "Contacttitle" ]) ;}} First, create an entityconnection. It accepts a parameter to indicate which connection string is used in the config

(such as Acme).This sample uses the MPa (Multi page Web application) Multi-page mode (note: That is, using MVC and razor Technology) for development, this article does not use SPA (Note: Twotooth achyranthes root spa is using angular) single page mode. In order to use the most basic development template features, the Module zero module is not used in this article.The ABP template creates a multi-tiered solution, such as:The template automatically creates 6