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procedure TForm1.Button3Click(Sender: TObject);
begin
    //ÏÔʾ´´½¨µÄÊý¾Ý¼¯: dbgrid->datasource->clientdataset
    //Èç¹ûÊÖ¹¤¿ØÖÆdbgridÏÔʾ¿í¶È,dbgridÓÒ¼ü´´½¨Á½¸ö×Ö¶Îaa,bb,·Ö±ðÉèÖÿí¶È¼´¿É
    cds1.FieldDefs.Add('aa',ftString,40);
    cds1.FieldDefs.Add('bb',ftInteger);
    cds1.CreateDataSet;
    cds1.Append;cds1.FieldValues['aa']:='a1';cds1.FieldValues['bb']:='10';cds1.Post;
    cds1.Append;cds1.FieldValues['aa']:='a2';cds1.FieldValues['bb']:='20';cds1.Post;
    cds1.Append;cds1.FieldValues['aa']:='a3';cds1.FieldValues['bb']:='30';cds1.Post;
    //cds1.Active:=true;
    //cds1.EmptyDataSet;
end;


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