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WorkflowApplication.BeginCancel Method (AsyncCallback, Object)

Cancels a workflow instance asynchronously using the specified AsyncCallback and user-provided state.

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

'Declaration
Public Function BeginCancel ( _
	callback As AsyncCallback, _
	state As Object _
) As IAsyncResult

Parameters

callback
Type: System.AsyncCallback
The method to be called when the cancel operation has completed.
state
Type: System.Object
An optional application-specific object that contains information about the asynchronous operation.

Return Value

Type: System.IAsyncResult
A reference to the asynchronous cancel operation.

To determine whether the cancel operation was successful, call EndCancel(IAsyncResult). EndCancel(IAsyncResult) can be called from inside or outside of the callback method. If EndCancel(IAsyncResult) is called before the cancel operation completes, it blocks until the cancel operation completes. By default, the cancel operation must complete in 30 seconds or a TimeoutException is thrown from EndCancel(IAsyncResult).

This method cancels a workflow asynchronously using the IAsyncResult asynchronous design pattern. For more information, seeAsynchronous Programming Overview.

.NET Framework

Supported in: 4

.NET Framework Client Profile

Supported in: 4

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

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

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