IdeaBlade.EntityModel Assembly > IdeaBlade.EntityModel Namespace > EntityScalarAsyncExtensions Class > Count Method : Count<TSource>(IEntityScalarQuery<TSource>,Expression<Func<TSource,Boolean>>,CancellationToken) Method |
'Declaration
<ExtensionAttribute()> Public Overloads Shared Function Count(Of TSource)( _ ByVal source As IEntityScalarQuery(Of TSource), _ ByVal predicate As Expression(Of Func(Of TSource,Boolean)), _ ByVal cancellationToken As CancellationToken _ ) As Task(Of Integer)
'Usage
Dim source As IEntityScalarQuery(Of TSource) Dim predicate As Expression(Of Func(Of TSource,Boolean)) Dim cancellationToken As CancellationToken Dim value As Task(Of Integer) value = EntityScalarAsyncExtensions.Count(Of TSource)(source, predicate, cancellationToken)
[Extension()] public static Task<int> Count<TSource>( IEntityScalarQuery<TSource> source, Expression<Func<TSource,bool>> predicate, CancellationToken cancellationToken )
public async void AsyncCountWithPredicate() { int empCount = await _entityManager.Employees.AsScalarAsync().Count(e => e.BirthDate > DateTime.Parse("1/1/1955")); }
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