InvokeAsync Method

ClientBase(Of TChannel).InvokeAsync Method

[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

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 _
)

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 ClientBase(Of TChannel).InvokeAsync, and when each operation is completed, your event handler can determine which instance of the operation raised the completion event.

Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone

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