IDatasetBatchUpdate.BatchCommand

Syntax

BatchCommand: DatasetBatchCommand;

Description

The BatchCommand property determines method of update of records in a data source.

Example

Executing this example requires the table with the Table_1 identifier in repository. The table contains three fields with integer values.

Sub UserProc;
Var
    MB: IMetabase;
    Dsi: IDatasetInstance;
    Fields: IDatasetInstanceFields;
    Dbu: IDatasetBatchUpdate;
    Vals: Array[0..2] Of Variant;
    i: Integer;
Begin
    MB := MetabaseClass.Active;
    Dsi := MB.ItemById("Table_1").Open(Null) As IDatasetInstance;
    Fields := Dsi.Fields;
    Dbu := Dsi.CreateBatchUpdate;
    Dbu.BatchCommand := DatasetBatchCommand.Update;
    Dbu.KeyFieldNames := Fields.Item(0).Id;
    Dbu.BeginUpdate;
    While Not Dsi.Eof Do
        i := Fields.Item(0).Value As Integer;
        If i > 100 Then
            Vals[0] := i;
            Vals[1] := Fields.Item(1).Value;
            Vals[2] := (i + (Fields.Item(1).Value As Integer)) * 100;
            Dbu.AddRecord(Vals);
        End If;
        Dsi.Next;
    End While;
    Dbu.Commit;
End Sub UserProc;

After executing the example, records, which values of the first field are more than 100, are updated in the table. On updating, value of the third field is changed taking into account values of previous two fields.

See also:

IDatasetBatchUpdate