IdeaBlade.EntityModel.Compat Assembly > IdeaBlade.EntityModel.Compat Namespace > EntityScalarQueryAsyncExtensions Class > Contains Method : Contains<TSource>(IEntityScalarQuery<TSource>,TSource,Action<EntityScalarQueryOperation<Boolean>>,Object) Method |
'Declaration
<ExtensionAttribute()> Public Overloads Shared Function Contains(Of TSource)( _ ByVal source As IEntityScalarQuery(Of TSource), _ ByVal item As TSource, _ ByVal userCallback As Action(Of EntityScalarQueryOperation(Of Boolean)), _ Optional ByVal userState As Object _ ) As EntityScalarQueryOperation(Of Boolean)
'Usage
Dim source As IEntityScalarQuery(Of TSource) Dim item As TSource Dim userCallback As Action(Of EntityScalarQueryOperation(Of Boolean)) Dim userState As Object Dim value As EntityScalarQueryOperation(Of Boolean) value = EntityScalarQueryAsyncExtensions.Contains(Of TSource)(source, item, userCallback, userState)
[Extension()] public static EntityScalarQueryOperation<bool> Contains<TSource>( IEntityScalarQuery<TSource> source, TSource item, Action<EntityScalarQueryOperation<bool>> userCallback, object userState )
public void AsyncAny() { var op = _entityManager.Employees.AsScalarAsync().Any(); op.Completed += (o, e) => { bool result = e.Result; } }
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