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AsyncSelfServicingExtensionMethodsGetSingleAsyncT Method (IDao, DynamicQueryT, ITransaction, CancellationToken)
Async variant of GetSingleT(IDao, DynamicQueryT, ITransaction). 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.SelfServicing
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> GetSingleAsync<T>(
	this IDao dao,
	DynamicQuery<T> query,
	ITransaction transactionToUse,
	CancellationToken cancellationToken
)

Parameters

dao
Type: SD.LLBLGen.Pro.ORMSupportClassesIDao
The DAO.
query
Type: SD.LLBLGen.Pro.QuerySpecDynamicQueryT
The query.
transactionToUse
Type: SD.LLBLGen.Pro.ORMSupportClassesITransaction
The transaction to use.
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 IDao. 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
NotSupportedException
NotSupportedExceptionThrown if the resultset has 0 or 2 or more elements, as Single requires a single value in the resultset.
See Also