entity framework query tutorial

ASP. NET MVC5 + EF6 getting started tutorial (5) Model and Entity Framework, mvc5ef6 Source: Slark. NET-blog Park http://www.cnblogs.com/slark/p/mvc-5-ef-6-get-started-model.html Previous section: ASP. net mvc 5 getting started tutorial (4) View and ViewBag Download source code: Click here to download1. Create a Model

Entity Framework tutorial -- DBContext, entitydbcontext DBContext: In the previous section "create an object data model", EDM creates a SchoolDBEntities class for us.System. Data. Entity. DbContextThis class. This DbContext is called the context class in EF. Before EF4.1, the context class generated by EDM is derived

Entity Framework tutorial -- EF architecture, entityef EF Architecture It is a panorama of the EF architecture, allowing us to understand the usefulness of each component separately. EDM (Entity Data Model ): EDM consists of three main parts: Conceptual Model, Mapping, and Storage Model ). Conceptual Model: Conceptual

: Instantiate DbContext to perform crud operations. 1 2 using (varnew schooldbentities ()) 3 { 4 5 // perform crud operations here: 6 } 7 View Code Get ObjectContext from DbContext: The APIs in DbContext in common tasks are easier to use than the ObjectContext API. Of course you can also get ObjectContext references from DbContext to use some of these methods. Can be done with Iobjectcontextadpter. 1 2 using (varnew schooldbentities ()) 3 { 4

Service:The Object service accesses the primary portal of the database and returns the data that is accessed. It is primarily responsible for specific things, such as getting data from the entity client data provider (its next layer) and converting it to a solid object.Entity Client Data Provider:The primary responsibility of this layer is to translate queries provided by LINQ to Entities or entity SQL int

Original: ASP. MVC5 + EF6 Introductory Tutorial (5) Model and entity FrameworkArticle Source: slark.net-Blog Park http://www.cnblogs.com/slark/p/mvc-5-ef-6-get-started-model.htmlPrevious section: ASP. NET MVC 5 Getting Started Tutorial (4) View and ViewBagNext section: ASP. MVC5 + EF6 Tutorial (6) View Razor useSOURCE

You are here: Home > Programming Development > C_VC Video Tutorials > c#.net EF Entity Framework Getting Started video tutorial > Kingstone Kingston Phone memory card 16G only 65 yuan 1.EF Entity Framework Add QueryUpload date:2014-09-14 18:48:21 related summary:-hack

Entity Framework FoundationThis textbook will teach you how to use the Entity Framework, and we will use Entity Framework 6.0 and Visual Studio 2012.The following table is a major version of the

create a new diagram and move Teacher and Course entities to a new diagram as shown below:So, in the this-is-a-can create a new diagram from an existing diagram.You can also include the related entities of a particular entity. For example, right click on Student entity→select ' Include related '. Standard and Course entities would also be included, because Student have their reference property:This would i

Entity Framework tutorial -- create an object data model, entityframework Create an object data model: This article will show you how to create an EDM SchoolDB database and understand the infrastructure module. The Entity Data Model (EDM) is a model used to describe the relationship between entities. The following uses

Lazy Loading:One of the important functions of the Entity Framework is the lazy loading. Lazy loading means delaying the loading of related data, until you specifically request for it. For example, the Student class contains studentaddress as a complex property. So, the context first loads all the students from the database and then it'll load the address of a particular student when We access Studentaddres

below Click Add The controller and view corresponding to the model class are automatically added to the project for the operation of the model for additional pruning and checking.In Solution Explorer, right-click the Views folder under the Employees folder under the index.cshtml selection in the browser. The following results are obtained.You can see an empty list of the model's corresponding.Let's look at the database below. Click Show All files as shown in the small icon below Soluti

Explicit Loading with DBContextEven with lazy loading disabled, it's still possible to lazily load related entities, but it must was done with an Explici T call. Use the Load method of Dbentityentry object to accomplish this.The following code explicitly loads standard of particular Student using the Reference () method of Dbentityentry:using(varContext =Newschooldbentities ()) { //Disable Lazy LoadingContext. configuration.lazyloadingenabled =false; varStudent = ( fromSinchcontext. Studentsw

This document is mainly introduced. NET development of two new technologies,. NET Platform Language Integration query technology-LINQ, and ado.net new data access layer design technology ado.net Entity Framework. Ado. NET's LINQ to entity section is based on LINQ, First introducing LINQ technology for completeness. Pre

5. Filter overrides You can get Themore details from Microsoft msdnhttp://www.asp.net/visual-studio/ OVERVIEW/2013/RELEASE-NOTES#TOC10 Layout support: Supports only Master Page in MVC2. Supports notonlymaster page but also Layout page in MVC 3 and MVC4. Validation: Client-side Validation and asynchronous controllers are there in MVC2. Unobtrusive Ajax and Client side Validation, Jquery Validation and JSON binding support are in MVC3. Client side validation, Jquery validation an