programming entity framework code first

officially start the ADO. NET Entity Framework Tour (Development Tool vs 2008 beta, taking the northiwind database as an example ). Create a console Project (select. NET Framework 3.5), click Add new item, and you will see the options of ADO. NET Entity Data Model: Then, the wizard appears. Select the database, selec

corresponding to the Gateway Schoolentities. Student. addobject (Stu ); // Persistent to Hard Disk Schoolentities. savechanges ();}Console. writeline ( " OK " );}} ProgramRun successfully. View the database: The result is correctly executed. To sum up, I will first add an entity model, then add an entity class above, and generate a database directly based on the SQL generated by the mod

The Entity framework maps the entities and relationships defined in the conceptual model to the data source, using the Entity Framework to materialize the data returned by the data source as objects, to track changes made by objects, to handle concurrent processing, to propagate object changes to the data source, and s

With the introduction of the latest major version of the Entity Framework EF6, the Microsoft Object Relational Mapping (ORM) tool has reached a new level of professionalism and is no longer a layman compared to the prestigious. NET ORM tools. The EF is fully mature and is moving beyond the previously widely used tools. The Entity

If you have not touched on or do not know what Entity Framework is, please refer to some basic concepts and operation methods of the Entity Framework here. In a word, Entity Framework is a new data operation

used by applications built on the Entity Framework. applications that use the EDM define entities and relationships in the application domain in the design schema. The design schema is used to build a programmable class that is used by application code. The storage structure that persists application data in this model is represented by another schema, called th

ASP. NET Mvc5.0+entity Framework (EF) 6.1 Series TutorialsIt has been more than a year since the Webform+ado.net development model was converted to the ASP. NET MVC+EF development model. have been hoping to be able to write down a little bit of their own development, now make a list, encourage yourself to write down.1.1 Entity

Tags: ORM Entity Framework Database FirstAs we all know, since the 4.x version, the Entity framework began to support the database first, model three generation mode, in the previous blog, we learned about the code There is also a pattern called codeonly, which, in compariso

Label:Original: http://www.cnblogs.com/dudu/archive/2011/12/27/entity_framework_sys_databases.html The "Trespass sys.databases" here refers to a query initiated by the Entity Framework by default: SELECT Count (*) from sys.databases WHERE [name]=n ' database name ' Note: This article is for the Entity Framework

Entity Framework 6 Recipes Chinese translation series (9), entityframework For the original intention of translation and why I chose Entity Framework 6 Recipes, see the beginning of this series.2-10 Table per Hierarchy Inheritance Modeling Problem You have such a database table with a type or validation column. It can

Today in Boy's (stingy God) blog to see a wonderful article Astoria to the SQLite to the Entity Framework to build your ORM concept. The article said a lot of wonderful content, from SQLite for Ado.net 2.0 Da Ta Provider to the Entity Framework EF, as well as the ORM concept, lists the complete ORM view: The four dire

Entity Framework 6 Recipes Chinese translation series (7), entityframework2-6 split entities into multiple tables Problem You have two or more tables that share the same primary key. You want to map them to a separate entity. Solution 　　Let's use the two tables shown in Figure 2-15 to demonstrate this situation. Figure 2-15: two tables, Prodeuct and ProductWebIn

1. Introduction to Entity Framework http://www.cnblogs.com/aehyok/p/3315991.html 2. Entity Framework DBFirst try http://www.cnblogs.com/aehyok/p/3318892.html 3. Entity Framework ModelFirst try http://www.cnblogs.com/aehyok/p/332

Previously, the COUNT query statement generated by Entity Framework 4 was found, and the paging SQL statement generated by Entity Framework 4 was found today, but this problem does not exist in LINQ to SQL. >>> Let's take a look! Code: Check the generated SQL statement: 1.

ImprovementEntity model designer, multi-graph modelBatch import Stored Procedure EF 6 Visual Studio 2013 (. NET 4.5) Enhanced Power ToolsEF is released independently from Visual Studio and. NET through nugetYou can configure the number of Retries for an unstable connection.Supports asynchronous Task-based programming mode async query and save in. Net 4.5.Optimized configuration option code-

automatically generated by Migration. Even if you are using your own projects, do you dare to do this in a real Large-Scale Real-time production environment? In the past, the structure Hash value of each data table was recorded in the Migration table. If you manually modify the table structure, the Entity Framework still reports an error even if the structure is consistent, because the Hash value is incorr

address was addressed by Address,city,region, Country and PostalCode this several combinations. Below, describe the specific steps to be done: Step one: Generate the Entity model The production of the entity model can be generated directly by the VS visual designer (if not, refer to the basic overview of the Entity Framew