AsyncAdapterExtensionMethods.FetchFirstAsync(TEntity) Method (IDataAccessAdapter, EntityQuery(TEntity), CancellationToken)

AsyncAdapterExtensionMethodsFetchFirstAsyncTEntity Method (IDataAccessAdapter, EntityQueryTEntity, CancellationToken)

Async variant of FetchFirstTEntity(IDataAccessAdapter, EntityQueryTEntity). Fetches the first entity of the set returned by the query and returns that entity, if any, otherwise null.

Namespace: SD.LLBLGen.Pro.QuerySpec.Adapter
Assembly: SD.LLBLGen.Pro.ORMSupportClasses (in SD.LLBLGen.Pro.ORMSupportClasses.dll) Version: 5.2.0.0 (5.2.17.0403)

Syntax

Copy

public static Task<TEntity> FetchFirstAsync<TEntity>(
	this IDataAccessAdapter adapter,
	EntityQuery<TEntity> query,
	CancellationToken cancellationToken
)
where TEntity : EntityBase2, IEntity2

<ExtensionAttribute>
Public Shared Function FetchFirstAsync(Of TEntity As {EntityBase2, IEntity2}) ( 
	adapter As IDataAccessAdapter,
	query As EntityQuery(Of TEntity),
	cancellationToken As CancellationToken
) As Task(Of TEntity)

Parameters

adapter: Type: SD.LLBLGen.Pro.ORMSupportClassesIDataAccessAdapter
The adapter.
query: Type: SD.LLBLGen.Pro.QuerySpecEntityQueryTEntity
The query.
cancellationToken: Type: System.ThreadingCancellationToken
The cancellation token.

Type Parameters

TEntity: The type of the entity.

Return Value

Type: TaskTEntity
the first entity in the resultset, or null if the resultset is empty.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IDataAccessAdapter. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).

Reference

AsyncAdapterExtensionMethods Class

FetchFirstAsync Overload

SD.LLBLGen.Pro.QuerySpec.Adapter Namespace