Click or drag to resize

SelfServicingExtensionMethodsGetSingleAsyncTEntity Method (EntityQueryTEntity, ITransaction, CancellationToken)

Async variant of GetSingleTEntity(EntityQueryTEntity, ITransaction). Fetches the single entity of the set returned by the query and returns that entity. If there are no elements or more than 1 element, a NotSupportedException will be thrown.

Namespace:  SD.LLBLGen.Pro.QuerySpec.SelfServicing
Assembly:  SD.LLBLGen.Pro.ORMSupportClasses (in SD.LLBLGen.Pro.ORMSupportClasses.dll) Version: 5.10.0.0 (5.10.0)
Syntax
Copy
public static Task<TEntity> GetSingleAsync<TEntity>(
	this EntityQuery<TEntity> query,
	ITransaction transactionToUse,
	CancellationToken cancellationToken
)
where TEntity : EntityBase, IEntity

Parameters

query
Type: SD.LLBLGen.Pro.QuerySpecEntityQueryTEntity
The query.
transactionToUse
Type: SD.LLBLGen.Pro.ORMSupportClassesITransaction
The transaction to use.
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

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type EntityQueryTEntity. 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).
Exceptions
ExceptionCondition
ORMQueryConstructionExceptionThe ElementCreator in the query specified is either null or of the wrong type.
NotSupportedException
NotSupportedExceptionThrown if the resultset has 0 or 2 or more elements, as Single requires a single value in the resultset.
See Also