RepositoryExtensions.FindActualProjectionByKey<TEntity, TProjection, TPrimaryKey>(IRepository<TEntity, TPrimaryKey>, Func<IRepositoryQuery<TEntity>, IQueryable<TProjection>>, TPrimaryKey) Method

Loads from the store or updates an entity with the given primary key value. If no entity with the given primary key is found in the store, returns null.

Namespace: DevExpress.Mvvm.DataModel

Assembly: DevExpress.Mvvm.v23.2.DataModel.dll

NuGet Package: DevExpress.Scaffolding.Core

Declaration

C#

public static TProjection FindActualProjectionByKey<TEntity, TProjection, TPrimaryKey>(
    this IRepository<TEntity, TPrimaryKey> repository,
    Func<IRepositoryQuery<TEntity>, IQueryable<TProjection>> projection,
    TPrimaryKey primaryKey
)
    where TEntity : class

VB.NET

<ExtensionAttribute>
Public Shared Function FindActualProjectionByKey(Of TEntity As Class, TProjection, TPrimaryKey)(
    repository As IRepository(Of TEntity, TPrimaryKey),
    projection As Func(Of IRepositoryQuery(Of TEntity), IQueryable(Of TProjection)),
    primaryKey As TPrimaryKey
) As TProjection

Parameters

Name	Type	Description
repository	IRepository<TEntity, TPrimaryKey>	A repository.
projection	Func<IRepositoryQuery<TEntity>, IQueryable<TProjection>>	A LINQ function used to transform entities from the repository entity type to the projection entity type.
primaryKey	TPrimaryKey	A value to compare with the entity primary key.

Type Parameters

Name
TEntity
TProjection
TPrimaryKey

Returns

Type	Description
TProjection	The entity with the given primary key value. null if no entity is found.