WorkflowApplication::BeginCancel Method (AsyncCallback^, Object^)

.NET Framework (current version)

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

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

IAsyncResult^ BeginCancel(
	AsyncCallback^ callback,
	Object^ state


Type: System::AsyncCallback^

The method to be called when the cancel operation has completed.

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. EndCancel can be called from inside or outside of the callback method. If EndCancel 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.

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

.NET Framework
Available since 4.0
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