IdeaBlade.EntityModel Assembly > IdeaBlade.EntityModel Namespace > EntityScalarAsyncExtensions Class > FirstOrNullEntity Method : FirstOrNullEntity(IEntityScalarQuery,IPredicateDescription,CancellationToken) Method |
'Declaration
<ExtensionAttribute()> Public Overloads Shared Function FirstOrNullEntity( _ ByVal source As IEntityScalarQuery, _ ByVal predicateDescription As IPredicateDescription, _ ByVal cancellationToken As CancellationToken _ ) As Task
'Usage
Dim source As IEntityScalarQuery Dim predicateDescription As IPredicateDescription Dim cancellationToken As CancellationToken Dim value As Task value = EntityScalarAsyncExtensions.FirstOrNullEntity(source, predicateDescription, cancellationToken)
[Extension()] public static Task FirstOrNullEntity( IEntityScalarQuery source, IPredicateDescription predicateDescription, CancellationToken cancellationToken )
public async void AsyncFirstOrNullEntityWithPredicate() { Employee emp = await _entityManager.Employees.AsScalarAsync().FirstOrNullEntity(e => e.LastName.StartsWith("D")); }
Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2