Client datasets call AS_AS_RowRequest automatically to implement their FetchBlobs, FetchDetails , or RefreshRecord method. 

The ProviderName parameter indicates the provider associated with the dataset from which information should be fetched. 

The Row parameter is an OleVariant that describes the current record on the client dataset. 

The RequestType parameter indicates the type of information required. It is an integer version of the TFetchOptions type. (An integer because the value may be marshaled to a remote application server). To create a value for RequestType, take the corresponding TFetchOptions value, cast it to a Byte, and cast the result to an Integer:

Integer(Byte([foBlobs, foDetails]));
(int) (Byte) (TFetchOptions() << foBlobs << foDetails);

OwnerData contains custom information that is supplied by a client dataset's BeforeAS_RowRequest event handler. This information is passed to the provider's BeforeAS_RowRequest event handler. OwnerData returns custom information supplied by the provider's AfterAS_RowRequest event handler. 

The requested data is returned as a delta packet.

RowRequest 

BeforeRowRequest 

AfterRowRequest 

FetchBlobs 

FetchDetails 

RefreshRecord 

Providers 

IAppServer