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Entity Framework object Framework formation journey -- Code First Framework Design (5), entity -- code
The previous several articles introduced the formation process of the
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Why is another query used?
Entity SQL)
Parameterized Object Query)
Query using the LINQ Method
Use the query constructor and Entity SQL query
Programming Entity FrameworkTranslation index for version 2 Query using object service and Enti
meaningful advice in the remaining queries.Y.alan Griver, a member of Microsoft's early engagement with LINQ, revealed that when Microsoft's developers modified the syntax for IntelliSense, they joked that the syntax was "Yoda speak".
In the query, C is just any variable name, allowing you to reference what you need after the query. It is called a control variable. Control variables provide another way for IntelliSense and compilation to make LINQ more efficient for developers.
Entity Framework Power Tools:Entity Framework Power Tools (currently in Beta 3) has been released. EF Power Tools is useful mainly in reverse engineering and generating read-only Entity Data Model for Code-first.Download and install Power Tools from VisualstudiogalleryAfter
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Entitycontainer
Entityset
Entitytype
Association
Navigation Properties
Returns the navigation attribute of the set.
Programming Entity FrameworkVersion 2Translation Index Metadata supported by the Model
So far, you have only seen the concept of the model in the designer, and its edmx has a more important part: storage model and ing.
Note: in fact, the edmx
or view name, stored procedure name, or the parameters they require. You do not need to create the objects used to connect to the database, do not care about the structure of the returned data, and then use the code to convert them into objects.
You only need to work with the conceptual model and code model entity classes. When you do this in the scope of EF,
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Where does the context and class come from?
Write your first LINQ to entities Query
Programming Entity FrameworkVersion 2Translation Index
You can use various methods to query the object data model. You choose some methods because of your personal preferences, while others because you can use special benefits. You may have heard of LINQ to entities and
http://www.cnblogs.com/kenshincui/p/3280742.html#autoid-0-0-0
Overview
When developing data-oriented software, we often make the effort to solve business problem entities, relationships, and logical building models, and the creation of ORM provides us with an elegant solution. The Ado.net Entity Framework is a ado.net-driven ORM framework in. NET development t
naming foreign key columns when creating foreign keys based on default conventions. In the programming Entity Framework Code first book, the 3 types of foreign key column names are agreed by: [Target type key name], [target type name] + [Target type Ke Y name], or [Navigation property name] + [target type key name], t
ways of naming foreign key columns when creating foreign keys based on default conventions. In the programming Entity Framework Code first book, the 3 types of foreign key column names are agreed by:[target type key name], [target type name] + [target TYP E Key name], or [Navigation property name] + [target type key n
Entity Framework object Framework formation journey -- using Fluent API configuration in Code First mode (6), -- codefluent
The previous article Entity Framework formation journey-Code
. NET development when it comes to manipulating databases, especially when accessing SQL Server databases, it's often necessary to use some ORM frameworks, the most commonly used, and the most powerful ones to count EF. When using EF for database-related development, there are typically two modes involved: 1,db First;2,code first. Compared to the former, Code first is more flexible and suitable for agile de
Learning Code First and entityframework in Entity Framework
Reference page:
Http://www.yuanjiaocheng.net/entity/dbcontext.html
Http://www.yuanjiaocheng.net/entity/entitytypes.html
Http://www.yuanjiaocheng.net/entity/
Code First Entity Framework 6 passive to active explicit it loading mode practical analysis (with source Code), entityloading
There are three ways to use Entity Framework to load correlated entities:
1. lazy Loading );
2. Greedy l
;using System.Data.Entity; namespace portal{public class Portalcontext:dbcontext { static portalcontext () { Database.setinitializerIn PortalContext.cs, static constructors and constructors for classes are used. Where you set the initialization of the database in the static constructor and specify the connectionstring of app. Config in the constructor.3.1 Entity Framework Data
Issue: After migrating the database using the Entity Framework, each time you modify the code (not the Model code), the error is:Models that support the "Xxxdbcontext" context have changed since the database was created. Consider migrating the update database (http://go.microsoft.com/fwlink/?LinkId=238269) using
[Original address] Code-first development with Entity Framework 4
. Net 4 is accompanied by the release of an Entity Framework (EF)-a data access function library located in the system. Data. entity namespace.
When
Reprinted: Learn the Code First and entityframework in Entity Framework
I think it's good after reading it. it's suitable for learning materials and I will repost it.
Link: http://www.cnblogs.com/Wayou/archive/2012/09/20/EF_CodeFirst.html
This is an article written last week. It was written at the suggestion of the company's haoge. It was originally shared by th
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