scaffold dbcontext

Label:In fact, I've written about WEBAPI and EF Service unit tests before, and you can refer to: ASP. NET WebAPI Unit test Unit test mock EF dbcontext and Dbset Include Let's take a look at the project structure diagram: This demo is very simple, utwebapi.data is a pure data definition, Utwebapi.service is our business service logic layer, UTWEBAPI is our WEBAPI implementation, Utwebapi.tests is the test project. Data layer: Bloggerdbcontext's constr

Tags: mic scope method call prepare trace back operation nbsp a sectionFrom:http://www.cnblogs.com/xishuai/p/ef-dbcontext-thread-safe.html First look at this section of the exception information: A second operation started on this context before a previous asynchronous operation completed. The use of ' await ' to ensure, which any asynchronous operations has completed before calling another method on the this context. Any instance members is

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 from the ObjectContext class. It is a bit dif

The EDM automatically generates the SchoolEntities class in the previous section, which inherits DbContextPrior to EntityFramework4.1, the EDM-generated class inherits ObjectContext, uses ObjectContext a little tricky, dbcontext conceptually similar to ObjectContext, it's ObjectContext encapsulation, DBCO ntext is an important part of EF, it is a bridge of domain or entity classes and databasesDbContext is the primary class responsible for transformin

Entity Framework 4.1/4.3 (DBContext 3 state tracking) 　　Let's talk about DBContext. This time the content will be consistent with the content mentioned in DBContext 2. 2. add, delete, and modify objects in DBContext (Adding, Changing, and Deleting Entities) In DBContext 2,

Tags: image container env ADO Goodnight Framework provider ROM eatingObjectiveIn the previous article, we talked briefly about how to migrate in EF Core1.1, and in this article we'll talk about the things that are not known in EF Core1.1, and take the details from me.Explicitly creating an DbContext instance through a constructor with onconfiguringThis is supposed to be our simplest way, by calling a class that inherits from

Label:This chapter is mainly about how to configure the location of the database accessed by the DbContext subclass.I believe that the database location that you use most often is configured as a configuration file, that is, the database that you want to access is configured via app. Config or Web. config. We can add a configuration of the connection string to the configuration file to define the location of the database.So how does code first know wh

Tags: public context how modelExplicitly creating an DbContext instance through a constructor with onconfiguringThis must be our simplest way, by calling a class that inherits from DbContext and calling its parameterless constructor, and we need to remember that whenever we instantiate it we need to release it, which is to wrap its instance in a using. As follows:using (var context = new Efcorecontext ()) {

Tags: development example UIL namespace RAS based stored Procedure API fontDBContext: In the previous chapter, "Creating the Entity Data Model", the EDM created the Schooldbentities class for us, which derives the class of sub- System.Data.Entity.DbContext , This dbcontext is called the context class in EF. Before EF4.1, the context class generated by the EDM was derived from the class ObjectContext. It's a little hard to use.

When I wrote this blog, I heard that EF7 were released for half a year, and I was deeply dissatisfied with the role of my old Chaser, who was very hard to spit on.To get to the point, mention DbContext will have to mention ObjectContext, since the first release of EF, the most important component is ObjectContext, ObjectContext provides a conceptual model for interacting with the database (writing query expressions, executing queries, tracking model m

In the example of entityframework code first, a class that inherits dbcontext is generally created, and several dbset At first, I tried to define a method using reflection to pass in the type of the business object that I want to create. As a result, I found that there is no way for an existing class (dbcontext) add the wildcard attribute dbset Then I tried to create a configuration class for entitytypeconf

Http://www.cnblogs.com/BuBu/archive/2012/09/18/2689900.htmlFirst, ObjectContext is a model-first development model, and DbContext is a code-first development model. This is the most fundamental difference between the two.At the same time the two can be converted to each other:Examples of conversions are given below1 DbContext converted to ObjectContextUsing System.Data.Entity.InfrastructureObjectContext con

Ef4.1 includes code first and dbcontext APIs. Dbcontext API provides EF with more working methods: code first, database first, and model first. Use dbcontext Constructor 1. Code first convention connection Namespace magic. Unicorn{Public class unicornscontext: dbcontext{Public unicornscontext ()// C # Will Call base cl

Multiple DbContext business needs that use multiple dbcontext or kinds of databases in a projectSingle DbContext use does not need to give a description1, dotnet EF migrations Add migrationname2. dotnet EF Database UpdateMultiple DbContext Use the following command to specify the D