| IdeaBlade.EntityModel Assembly > IdeaBlade.EntityModel Namespace > EntityScalarAsyncExtensions Class : SingleOrNullEntity Method |
| Overload | Description |
|---|---|
| SingleOrNullEntity<TSource>(IEntityScalarQuery<TSource>) | Returns the only element of a sequence, or the appropriate NullEntity if the sequence is empty; this method throws an exception if there is more than one element in the sequence. |
| SingleOrNullEntity<TSource>(IEntityScalarQuery<TSource>,CancellationToken) | Returns the only element of a sequence, or the appropriate NullEntity if the sequence is empty; this method throws an exception if there is more than one element in the sequence. Pass in a System.Threading.CancellationToken to cancel operation. |
| SingleOrNullEntity<TSource>(IEntityScalarQuery<TSource>,Expression<Func<TSource,Boolean>>) | Returns the only element of a sequence that satisfies a specified condition, or the appropriate NullEntity if no such element exists; this method throws an exception if more than one element satisfies the condition. |
| SingleOrNullEntity<TSource>(IEntityScalarQuery<TSource>,Expression<Func<TSource,Boolean>>,CancellationToken) | Returns the only element of a sequence that satisfies a specified condition, or the appropriate NullEntity if no such element exists; this method throws an exception if more than one element satisfies the condition. Pass in a System.Threading.CancellationToken to cancel operation. |
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