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PersistenceProvider::BeginLoadIfChanged Method (TimeSpan, Object^, AsyncCallback^, Object^)
.NET Framework (current version)
When implemented in a derived class, represents the beginning of the LoadIfChanged phase. The LoadIfChanged phase occurs when state data is loaded into the persistence provider from the persistence store, and the state data in the persistence store has been changed.
Assembly: System.WorkflowServices (in System.WorkflowServices.dll)
public: virtual IAsyncResult^ BeginLoadIfChanged( TimeSpan timeout, Object^ instanceToken, AsyncCallback^ callback, Object^ state )
Parameters
- timeout
-
Type:
System::TimeSpan
The time period after which the persistence provider aborts this attempt.
- instanceToken
-
Type:
System::Object^
The token returned by a previous Create or Update that represents the current state held by the caller.
- callback
-
Type:
System::AsyncCallback^
The method to be called when the operation is completed.
- state
-
Type:
System::Object^
A user-provided object that distinguishes this particular asynchronous operation from other operations.
Return Value
Type: System::IAsyncResult^The state of the BeginLoadIfChanged asynchronous method call.
The following code demonstrates how to implement the BeginLoadIfChanged method.
public override IAsyncResult BeginLoadIfChanged(TimeSpan timeout, object instanceToken, AsyncCallback callback, object state) { base.ThrowIfDisposedOrNotOpen(); return this.factory.BeginLoad(this.Id, timeout, callback, state); }
.NET Framework
Available since 3.5
Available since 3.5
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