AsyncAdapterExtensionMethods.FetchSingleAsync(T) Method (IDataAccessAdapter, DynamicQuery(T), CancellationToken)

AsyncAdapterExtensionMethodsFetchSingleAsyncT Method (IDataAccessAdapter, DynamicQueryT, CancellationToken)

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

Namespace: SD.LLBLGen.Pro.QuerySpec.Adapter
Assembly: SD.LLBLGen.Pro.ORMSupportClasses (in SD.LLBLGen.Pro.ORMSupportClasses.dll) Version: 5.0.0.0 (5.0.0)

Syntax

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public static Task<T> FetchSingleAsync<T>(
	this IDataAccessAdapter adapter,
	DynamicQuery<T> query,
	CancellationToken cancellationToken
)

<ExtensionAttribute>
Public Shared Function FetchSingleAsync(Of T) ( 
	adapter As IDataAccessAdapter,
	query As DynamicQuery(Of T),
	cancellationToken As CancellationToken
) As Task(Of T)

Parameters

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

Type Parameters

T

Return Value

Type: TaskT
the first object in the resultset

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).

Exceptions

Exception	Condition
NotSupportedException
NotSupportedException	Thrown if the resultset has 0 or 2 or more elements, as Single requires a single value in the resultset.

Reference

AsyncAdapterExtensionMethods Class

FetchSingleAsync Overload

SD.LLBLGen.Pro.QuerySpec.Adapter Namespace