FirstOrDefault<TSource>(IEntityScalarQuery<TSource>) Method

Returns the first element in the sequence or a default value if the sequence contains no elements.

Syntax

Visual Basic
C#

'Declaration
 
<ExtensionAttribute()>
Public Overloads Shared Function FirstOrDefault(Of TSource)( _
   ByVal source As IEntityScalarQuery(Of TSource) _
) As Task(Of TSource)

'Usage
 
Dim source As IEntityScalarQuery(Of TSource)
Dim value As Task(Of TSource)
 
value = EntityScalarAsyncExtensions.FirstOrDefault(Of TSource)(source)

[Extension()]
public static Task<TSource> FirstOrDefault<TSource>( 
   IEntityScalarQuery<TSource> source
)

Parameters

source

Type Parameters

TSource

Example

public async void AsyncFirstOrDefault() {
  Employee emp = await _entityManager.Employees.AsScalarAsync().FirstOrDefault();
}

Requirements

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

Reference

EntityScalarAsyncExtensions Class
EntityScalarAsyncExtensions Members
Overload List