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ClientBase(Of TChannel).InvokeAsync Method

Provides support for implementing the event-based asynchronous pattern. For more information about this pattern, see Event-based Asynchronous Pattern Overview.

Namespace:  System.ServiceModel
Assembly:  System.ServiceModel (in System.ServiceModel.dll)

'Declaration
Protected Sub InvokeAsync ( _
	beginOperationDelegate As ClientBase<(Of <(TChannel>)>)..::.BeginOperationDelegate, _
	inValues As Object(), _
	endOperationDelegate As ClientBase<(Of <(TChannel>)>)..::.EndOperationDelegate, _
	operationCompletedCallback As SendOrPostCallback, _
	userState As Object _
)
'Usage
Dim beginOperationDelegate As ClientBase<(Of <(TChannel>)>)..::.BeginOperationDelegate 
Dim inValues As Object()
Dim endOperationDelegate As ClientBase<(Of <(TChannel>)>)..::.EndOperationDelegate 
Dim operationCompletedCallback As SendOrPostCallback 
Dim userState As Object 

Me.InvokeAsync(beginOperationDelegate, _
	inValues, endOperationDelegate, _
	operationCompletedCallback, userState)

Parameters

beginOperationDelegate
Type: System.ServiceModel.ClientBase(Of TChannel).BeginOperationDelegate

A delegate that is used for calling the asynchronous operation.

inValues
Type: System.Object()

The input values to the asynchronous call.

endOperationDelegate
Type: System.ServiceModel.ClientBase(Of TChannel).EndOperationDelegate

A delegate that is used to end the asynchronous call after it has completed.

operationCompletedCallback
Type: System.Threading.SendOrPostCallback

A client-supplied callback that is invoked when the asynchronous method is complete. The callback is passed to the ClientBase(Of TChannel).BeginOperationDelegate.

userState
Type: System.Object

The userState object to associate with the asynchronous call.

Provide a unique value, such as a GUID or hash code, in the userState parameter for each call to InvokeAsync(BeginOperationDelegate, Object, EndOperationDelegate, SendOrPostCallback, Object), and when each operation is completed, your event handler can determine which instance of the operation raised the completion event.

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5 SP1, 3.0 SP1

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