Datasnap.DataBkr.TRemoteDataModule.AS_GetParams
| [–] Properties | |
|---|---|
| Type: function | |
| Visibility: protected | |
| Source: Datasnap.DataBkr.pas Datasnap.DataBkr.hpp
| |
| Unit: Datasnap.DataBkr | |
| Parent: TRemoteDataModule | |
Delphi
function AS_GetParams(const ProviderName: WideString; var OwnerData: OleVariant): OleVariant; safecall;
C++
HRESULT __safecall AS_GetParams(const System::WideString ProviderName, System::OleVariant &OwnerData, System::OleVariant &__AS_GetParams_result);
Description
Fetches current parameter values from the dataset bound to a specified provider.
Use AS_GetParams to retrieve the current parameter values from the dataset associated with a provider. The ProviderName parameter specifies the name of the provider component whose dataset has the parameters. The OwnerData represents custom information that originates in a client dataset's BeforeGetParams event handler and returns information that is passed to the client dataset's AfterGetParams event handler.
AS_GetParams _result (C++) or AS_GetParams (Delphi) returns the parameters, encoded as a Variant array, or, if the provider does not support parameter fetching, it returns a Null Variant. Use the UnpackParams procedure to convert parameter values returned by AS_GetParams to a TParams object.
AS_GetParams should not be used to retrieve output parameters from stateless application servers, because parameter values may be changed by other applications. When writing a stateless application server, obtain output parameters using the AS_Execute method handler instead.
Note: Applications can only call the protected AS_GetParams method using the TRemoteDataModule interface.