Average(IEntityScalarQuery,IProjectionSelector,Action<EntityScalarQueryOperation>,Object) Method

Computes the average of a sequence of numeric values that is obtained by invoking a projection function on each element of the input sequence.

Syntax

Visual Basic
C#

'Declaration
 
<ExtensionAttribute()>
Public Overloads Shared Function Average( _
   ByVal source As IEntityScalarQuery, _
   ByVal projectionSelector As IProjectionSelector, _
   ByVal userCallback As Action(Of EntityScalarQueryOperation), _
   Optional ByVal userState As Object _
) As EntityScalarQueryOperation

'Usage
 
Dim source As IEntityScalarQuery
Dim projectionSelector As IProjectionSelector
Dim userCallback As Action(Of EntityScalarQueryOperation)
Dim userState As Object
Dim value As EntityScalarQueryOperation
 
value = EntityScalarQueryAsyncExtensions.Average(source, projectionSelector, userCallback, userState)

[Extension()]
public static EntityScalarQueryOperation Average( 
   IEntityScalarQuery source,
   IProjectionSelector projectionSelector,
   Action<EntityScalarQueryOperation> userCallback,
   object userState
)

Parameters

source
projectionSelector
userCallback
userState

Example

public void AsyncAverageWithPredicate() {
   var op = _entityManager.OrderSummaries.AsScalarAsync().Average<OrderSummary, Nullable<Decimal>>(o => o.Freight);
   op.Completed += (o, e) => {
     var ct = e.Result;
   };
 }

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

EntityScalarQueryAsyncExtensions Class
EntityScalarQueryAsyncExtensions Members
Overload List