EdmX

EdmX is a data wrapper for Entity Framework Core (EF Core) and ModelBinder used in.NET Core and.NET 5 applications. It enables developers to share their entity types between the data access layer and the view model layer, facilitating a seamless integration between them.

The primary function of EdmX is to act as an intermediary between the EF Core context and the model binder, allowing for a standard way of accessing data with ModelBinder. It provides a simple and standardized way of accessing and projecting data from entities, without the need for individualized pattern-specific model binder implementations for each entity.

EdmX introduces the concept of Entity Data Models (EdMs), which are a metadata representation of entities. EdMs are built by EdmX by taking into account the properties of the entities and their navigation properties. The resulting metadata representation can be used by ModelBinder to correctly map the data from entities to typed representations.

Edmx also allows for partial projections of entities, enabling developers to project only a subset of properties of an entity to a prototype, without the need for transitive closure of relationships. This makes it possible to access and project partial data without loading the entire entity.

Edmx is developed and maintained by a team at Microsoft, and is available as a package on NuGet. It is compatible with EF Core 2.1 and later version and supports.NET Core 2.1 and later versions. By providing a standardized data wrapper and metadata representation of entities, EdmX aims to bridge the gap between data access and the data model.