RAD Studio VCL Reference
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TDataSetProvider.GetDataSetFromDelta Method
TDataSetProvider Class | TDataSetProvider Members | Provider Namespace | Description | See Also
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Returns a dataset positioned on the record of the source dataset that is currently being fetched or updated.

Pascal
function GetDataSetFromDelta(ATree: TUpdateTree; Source: TDataSet; Delta: TDataSet; Mode: TUpdateMode): TDataSet; virtual;
C++
virtual __fastcall TDataSet GetDataSetFromDelta(TUpdateTree ATree, TDataSet Source, TDataSet Delta, TUpdateMode Mode);
Description

GetDataSetFromDelta is used internally to fetch a specific record when the source dataset is unidirectional. 

ATree is a TUpdateTree object that represents the update or data fetch operation. 

Source is a source dataset. Because it is unidirectional, however, it is not necessarily positioned on the correct record. 

Delta is a delta dataset that indicates the desired record. 

Mode indicates the criteria to use for locating a record on the server from the dataset that Source uses. The values that follow these criteria come from Delta. 

GetDataSetFromDelta returns a unidirectional dataset that corresponds to Source but that contains a single record based on the criteria in Delta and Mode. 

 

See Also
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