CommunicationObject.BeginOpen Method (AsyncCallback, Object)
Microsoft Silverlight will reach end of support after October 2021. Learn more.
Begins an asynchronous operation to close a communication object.
Namespace: System.ServiceModel.Channels
Assembly: System.ServiceModel (in System.ServiceModel.dll)
Syntax
'Declaration
Public Function BeginOpen ( _
callback As AsyncCallback, _
state As Object _
) As IAsyncResult
public IAsyncResult BeginOpen(
AsyncCallback callback,
Object state
)
Parameters
- callback
Type: System.AsyncCallback
The AsyncCallback delegate that receives notification of the completion of the asynchronous open operation.
- state
Type: System.Object
An object, specified by the application, that contains state information associated with the asynchronous open operation.
Return Value
Type: System.IAsyncResult
The IAsyncResult that references the asynchronous open operation.
Implements
Exceptions
| Exception | Condition |
|---|---|
| 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. |
Remarks
The OnBeginOpen(TimeSpan, AsyncCallback, Object) method calls OnOpening and OnBeginOpen(TimeSpan, AsyncCallback, Object) if the communication object is initially in the Created state.
To insert processing after a communication object transitions to a closing state due to the invocation of a synchronous Open operation, use the Open method.
Version Information
Silverlight
Supported in: 5, 4, 3
Silverlight for Windows Phone
Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0
XNA Framework
Supported in: Windows Phone OS 7.0
Platforms
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.
See Also