DefaultIfEmpty<TSource>(IEntityQuery<TSource>) Method

Returns the elements in a sequence or a default valued singleton collection if the sequence is empty.

Syntax

Visual Basic
C#

'Declaration
 
<ExtensionAttribute()>
Public Overloads Shared Function DefaultIfEmpty(Of TSource)( _
   ByVal source As IEntityQuery(Of TSource) _
) As IEntityQuery(Of TSource)

'Usage
 
Dim source As IEntityQuery(Of TSource)
Dim value As IEntityQuery(Of TSource)
 
value = EntityQueryExtensions.DefaultIfEmpty(Of TSource)(source)

[Extension()]
public static IEntityQuery<TSource> DefaultIfEmpty<TSource>( 
   IEntityQuery<TSource> source
)

Parameters

source

Type Parameters

TSource

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

EntityQueryExtensions Class
EntityQueryExtensions Members
Overload List