entity framework select

In the previous chapters, we have designed a simple domain model, and then we want to be able to implement the domain model persistence and query. In Apworks, a warehousing infrastructure for the entity Framework, NHibernate, and MongoDB is implemented. In this section, I'll show you how to use the Entity Framework-bas

Today, I just learned the razor of MVC and used the Entity Framework together. The following error is returned: Cs0012: the type'System. Data. Objects. dataclasses. entityobject' IsDefinedInAn assembly thatIsNot referenced. You must add a reference to assembly'System. Data. entity, version = 4.0.0.0, culture = neutral, publickeytoken = b77a5c561934e089'.

]. In the dialog box that appears, select Web API 2 Controller-null ]: In the "add controller" dialog box, enter "AccountsController" in the "Controller name" column ]: After you click Add, Visual Studio opens the code editing interface of AccountsController. In this case, you can add the following code to the AccountsController class: [RoutePrefix("api/accounts")]public class AccountsController : ApiController{ private readonly IRepository Is t

;namespacecodefirst_fluentapi_tutorials{ Public classSchoolcontext:dbcontext { PublicSchooldbcontext ():Base() { } PublicDbsetGet;Set; } PublicDbsetGet;Set; } protected Override voidonmodelcreating (Dbmodelbuilder modelBuilder) {modelbuilder.entityDelegate(entitymappingconfigurationstudentconfig) {studentconfig.properties (P=New{p.studentid, p.studentname}); Studentconfig.totable ("Studentinfo"); }); Action{m.properties (P=New{p.studentid, p.height, P.weight, P

Description of Entity notes corresponding to the automatic association query and automatic association update navigation properties of Entity Framework, entityframework I. First, I want to know about the automatic association query of Entity Framework: Automatic association

Install Entity Framework Power Tools, 2015 entity on Visual Studio 2015 Entity Framework Power Tools is a very useful EF Code First plug-in. It allows you to easily generate model and dbcontext code that matches the database structure.This section describes how to switch th

Tags: event div sop ase Lap span onclick parent class interface1. Create an Entity Data Model using DB Frist modeDb Frist Create an Entity Data model (creating an EDMX is not the point, you can do it randomly), here named Zerocodedb, the resulting documents; Where the red box of the file (ZEROCODEDB.TT) is the entity's generated key code, that is, entity's T4 template file, this article is to move the knife

If lazy loading enable = true is not set in the Entity Framework, the handler must handle the loading of the metadata, for example, using load or include, however, because the include parameter number is string, it is very difficult for a person to find the parameter easily after tablename is changed with string, so I want to introduce an extension method. // Adventureworkslt2008r2entities context = new adv

ASP. NET MVC model (Create model class using Entity Framework)-Part.1The purpose of this tutorial is to explain how to use the Microsoft Entity Framework to create a data access class when you create an ASP. NET MVC application. This tutorial assumes that you have no prior knowledge of the Microsoft

The purpose of this tutorial is to explain how to use the Microsoft Entity Framework to create a data access class when you create an ASP. NET MVC application. This tutorial assumes that you have no prior knowledge of the Microsoft Entity Framework. After reading this tutorial, you will understand how to use the

Validate EntityYou can write the custom server side validation for any entity. To accomplish this, override validateentity method of DBContext as shown below.protected OverrideSystem.Data.Entity.Validation.DbEntityValidationResult validateentity (Dbentityentry entityentry, system.collections.generic.idictionaryObject,Object>items) { if(entityentry.entity isStudent) { if(entityentry.currentvalues.getvaluestring> ("Studentname") =="") {

By default, only the reference of the LINQ assembly is added to Web. config generated in MVC. If Entity Framework (EF) is used as the orm of MVC, you need to add the Assembly reference in webconfig: For example: ...... Asp.net MVC 2 cocould not load type 'System. Web. MVC. viewpage If problems such as cocould not load type 'System. Web. MVC. viewpage Code Code highlighting produced by Actipro CodeHighlight

Entity SQL contains many set types of data. Therefore, set operations are also important in Entity SQL. This section describes common set operators in Entity SQL. Note that before reading this article, we first agree that the set here can contain duplicate elements, rather than the set that we usually call to not contain duplicate elements. Set Syntax: Set (co

The purpose of this tutorial is to explain how to use the Microsoft Entity Framework to create a data access class when you create an ASP. NET MVC application. This tutorial assumes that you have no prior knowledge of the Microsoft Entity Framework. After reading this tutorial, you will understand how to use the

Entity Framework object Framework formation tour-several typical operations on the interface (8), entityframework In the previous article, "The Journey of Entity Framework formation -- separation and combination of data transmission model DTO and

From Zhang Ziyang http://www.cnblogs.com/JimmyZhang/archive/2009/05/18/1459326.html The purpose of this tutorial is to explain how to create an ASP. net mvc application.ProgramHow to use Microsoft Entity Framework to create a data entity class. This tutorial assumes that you have no knowledge of Microsoft Entity

deleted, rather than actually deleting records from the database. For example, you might not want to hard delete a user record from a database because it is associated with many other tables. In order to achieve the purpose of soft deletion we can implement the interface Isoftdelete: public interface isoftdelete{ bool isdeleted {get; set;} } The ABP realizes the soft deletion mode which is used in the Open box. When an entity that imp

Before writing the data Layer D layer when there are many SQL statements, how to omit the tedious SQL statements, Microsoft provides a good way-Entity Framework-entity framwork. An object mapping mechanism that supports. NET developers use domain-specific objects to come out of relational data, eliminating the need for most of the data access code that developers

In the previous article, we created an MVC application using the entity Framework and SQL Server LocalDB, and used it to store and display data. In this article, you will modify the CRUD (create, read, update, delete) code that is automatically created by the MVC framework.Note: Typically, we create an abstraction layer between the controller and the data access layer to implement the warehousing model, and

Entity Framework object Framework formation journey -- using Fluent API configuration in Code First mode (6), -- codefluent The previous article Entity Framework formation journey-Code First Framework Design (5) introduced the exp