What is context

Question

What is context

Sam Hobbs · Answer

The surroundings, circumstances, environment, background or settings that determine, specify, or clarify the meaning of an event or other occurrence. (linguistics) The text in which a word or passage appears and which helps ascertain its meaning. (archaeology) The surroundings and environment in which an artifact is found and which may provide important clues about the artifact's function and/or cultural meaning. (mycology) The trama or flesh of a mushroom. (logic) For a formula : a finite set of variables, which set contains all the free variables in the given formula. (programming) The data (register contents, program counter value, etc.) needed to switch to another thread of execution.

Jaimin Shethiya · Answer

@Sam that is not mention here, So you have added general context so I am adding here DbCOntext

Sam Hobbs · Answer

Are you asking about the DbContext class ? DbContext is highly specific. The word context is general. If you were to have asked about the DbContext class then I would have provided my understanding of the DbContext class that does not sound like documentation.

Jaimin Shethiya · Answer

Hello Srilekha, DbContext is a crucial class in Entity Framework (EF), acting as a bridge between your domain or entity classes and the database. Let’s delve into its purpose and functionality: Data Access Layer: When you want to incorporate EF-based data access into your application, you derive a class from DbContext. This derived class essentially becomes the data access layer of your application. In other words, if you intend to perform data access using Entity Framework, DbContext is the class you need. Responsibilities of DbContext: Database Connection: DbContext establishes a connection to the database. Querying Data: It allows you to query the database using LINQ or other methods. Saving Changes: DbContext tracks changes made to entities and persists those changes back to the database. Mapping Entities: You can define your database model using DbSet properties (representing collections of entities) within the context. Binding to UI Controls: DbContext enables binding objects in memory to UI controls. Lifetime and Usage: The lifetime of a DbContext begins when an instance is created and ends when it’s either disposed or garbage-collected. Best practices for context lifetime: In Web applications, use one context instance per request. In Windows Presentation Foundation (WPF) or Windows Forms, use one context instance per form. You can use the using statement to ensure proper resource disposal: public class YourDbContext : DbContext { } In summary, DbContext facilitates seamless interaction between your application and the database, making it a fundamental component when working with Entity Framework.

Sam Hobbs · Answer

@Jaimin I am hoping that members will learn how to help us to help them. Quite often in these forums questions are very vague. When the person asking for help spends very little time asking the question it uses up more of the time of those trying to help.

Mariusz Postol · Answer

@Jaimin Shethiya DbContext is tightly coupled with the session established with the database. For me, there are two important points "Connect" and "Disconnect". You haven't mentioned it. The context for interoperability with the database is session as @Sam Hobbs said: "The surroundings, circumstances, environment, background or settings ...". In this case communication parameters (location, protocols, timing details, etc) and credentials (to name only associated with the ConnectionString). I believe that this topic needs independent publication.