RepositoryExtensions.FindExistingOrAddNewEntity<TEntity, TProjection, TPrimaryKey>(IRepository<TEntity, TPrimaryKey>, TProjection, Action<TProjection, TEntity>) Method

Returns the entity that corresponds to the specified projection.

Namespace: DevExpress.Mvvm.DataModel

Assembly: DevExpress.Mvvm.v24.2.DataModel.dll

NuGet Package: DevExpress.Scaffolding.Core

Declaration

C#

public static TEntity FindExistingOrAddNewEntity<TEntity, TProjection, TPrimaryKey>(
    this IRepository<TEntity, TPrimaryKey> repository,
    TProjection projectionEntity,
    Action<TProjection, TEntity> applyProjectionPropertiesToEntity
)
    where TEntity : class

VB.NET

<ExtensionAttribute>
Public Shared Function FindExistingOrAddNewEntity(Of TEntity As Class, TProjection, TPrimaryKey)(
    repository As IRepository(Of TEntity, TPrimaryKey),
    projectionEntity As TProjection,
    applyProjectionPropertiesToEntity As Action(Of TProjection, TEntity)
) As TEntity

Parameters

Name	Type	Description
repository	IRepository<TEntity, TPrimaryKey>	A repository.
projectionEntity	TProjection	A projection.
applyProjectionPropertiesToEntity	Action<TProjection, TEntity>	An action which applies the projection properties to the newly created entity.

Type Parameters

Name
TEntity
TProjection
TPrimaryKey

Returns

Type	Description
TEntity	The entity that corresponds to the specified projection.

Remarks

Given a projection, this function returns the corresponding entity.

If the projection has no corresponding entity, a new entity is created and added to the repository.

Before the new entity is returned, the applyProjectionPropertiesToEntity action is used to transfer property values from the projection to the entity.