SelfServicingExtensionMethods.GetFirstAsync<T> Method (IDao, DynamicQuery<T>, ITransaction, CancellationToken)

Async variant of GetFirst<T>(IDao, DynamicQuery<T>, ITransaction). Fetches the first object of the set returned by the query and returns that object, if any, otherwise null.

Namespace: SD.LLBLGen.Pro.QuerySpec.SelfServicing
Assembly: SD.LLBLGen.Pro.ORMSupportClasses (in SD.LLBLGen.Pro.ORMSupportClasses.dll) Version: 5.4.0.0 (5.4.0)

Syntax

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public static Task<T> GetFirstAsync<T>(
	this IDao dao,
	DynamicQuery<T> query,
	ITransaction transactionToUse,
	CancellationToken cancellationToken
)

<ExtensionAttribute>
Public Shared Function GetFirstAsync(Of T) ( 
	dao As IDao,
	query As DynamicQuery(Of T),
	transactionToUse As ITransaction,
	cancellationToken As CancellationToken
) As Task(Of T)

Parameters

dao: Type: SD.LLBLGen.Pro.ORMSupportClasses.IDao
The DAO.
query: Type: SD.LLBLGen.Pro.QuerySpec.DynamicQuery<T>
The query.
transactionToUse: Type: SD.LLBLGen.Pro.ORMSupportClasses.ITransaction
The transaction to use.
cancellationToken: Type: System.Threading.CancellationToken
The cancellation token.

Type Parameters

T

Return Value

Type: Task<T>
the first object 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 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).

Reference

SelfServicingExtensionMethods Class

GetFirstAsync Overload

SD.LLBLGen.Pro.QuerySpec.SelfServicing Namespace