API:Datasnap.Provider.TDataSetProvider.AfterApplyUpdates
Delphi
property AfterApplyUpdates;
C++
__property AfterApplyUpdates;
Properties
| Type | Visibility | Source | Unit | Parent |
|---|---|---|---|---|
| event | published | Datasnap.Provider.pas Datasnap.Provider.hpp |
Datasnap.Provider | TDataSetProvider |
Description
Occurs after the provider applies updates.
Datasnap.Provider.TDataSetProvider.AfterApplyUpdates inherits from Datasnap.Provider.TCustomProvider.AfterApplyUpdates. All content below this line refers to Datasnap.Provider.TCustomProvider.AfterApplyUpdates.
Occurs after the provider applies updates.
Write an AfterApplyUpdates event handler to return custom information to a client dataset after applying updates. AfterApplyUpdates is part of the mechanism by which a client dataset and a provider communicate information about updates. When the provider is part of a stateless application server, this mechanism allows the provider and the client dataset to communicate persistent state information.
When the client dataset calls the AS_ApplyUpdates method of the IAppServer interface, the following events occur:
1.The provider receives a BeforeApplyUpdates event, where it can respond to or change custom information that the client dataset sends.
2.If it is a dataset provider, the provider receives an OnUpdateData event where it can edit the updates before they are applied.
3. The provider applies the updates, and attempts to resolve problems.
4.The provider receives an AfterApplyUpdates event, where it can encode custom information into its OwnerData parameter or respond to information from the BeforeApplyUpdates event handler.
5.The client dataset receives an AfterApplyUpdates event, where it can respond to the custom information returned by the provider in its AfterApplyUpdates event handler.
Note: If ApplyUpdates is called without the OwnerData parameter, on entry to the event handler the OwnerData parameter contains the value set in the BeforeApplyUpdates event handler and it is ignored on exit from the AfterApplyUpdates event handler.
AfterApplyUpdates is of type Datasnap.DBClient.TRemoteEvent.