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OnBeginOpen Method

CommunicationObject.OnBeginOpen Method

Inserts processing on a communication object after it transitions to the opening state due to the invocation of an asynchronous open operation.

Namespace:  System.ServiceModel.Channels
Assemblies:   System.ServiceModel (in System.ServiceModel.dll)
  System.ServiceModel.Primitives (in System.ServiceModel.Primitives.dll)

'Declaration
Protected MustOverride Function OnBeginOpen ( _
	timeout As TimeSpan, _
	callback As AsyncCallback, _
	state As Object _
) As IAsyncResult

Parameters

timeout
Type: System.TimeSpan

The Timespan that specifies how long the on open operation has to complete before timing out.

callback
Type: System.AsyncCallback

The AsyncCallback delegate that receives notification of the completion of the asynchronous on open operation.

state
Type: System.Object

An object, specified by the application, that contains state information associated with the asynchronous on open operation.

Return Value

Type: System.IAsyncResult
The IAsyncResult that references the asynchronous on open operation.

ExceptionCondition
InvalidOperationException

The communication object is not in a Opened or Opening state and cannot be modified.

ObjectDisposedException

The communication object is in a Closing or Closed state and cannot be modified.

CommunicationObjectFaultedException

The communication object is in a Faulted state and cannot be modified.

TimeoutException

The default interval of time that was allotted for the operation was exceeded before the operation was completed.

To insert processing after a communication object transitions to a opening state due to the invocation of a synchronous Open operation, use the Open method.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8

Portable Class Library

Supported in: Portable Class Library
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