public object GetValueForRow(int Row, int ColumnIndex)
{
if ((TPseudoColumn)ColumnIndex == TPseudoColumn.RowCount)
{
return(DataState.RowCount); //First so it does not check for eof.
}
if (Row >= RecordCount)
{
FlxMessages.ThrowException(FlxErr.ErrReadAfterEOF);
}
if (Row < 0)
{
FlxMessages.ThrowException(FlxErr.ErrReadBeforeBOF);
}
if (ColumnIndex >= ColumnCount)
{
FlxMessages.ThrowException(FlxErr.ErrInvalidColumn, ColumnIndex);
}
if (ColumnIndex < 0)
{
switch ((TPseudoColumn)ColumnIndex)
{
case TPseudoColumn.RowPos: return(DataState.Position);
default: FlxMessages.ThrowException(FlxErr.ErrInvalidColumn, ColumnIndex); break;
}
}
if (Row == DataState.Position)
{
return(DataState.GetValue(ColumnIndex)); //avoid an exception if movetorecord is not supported and we really don't need to move to record.
}
int SavePosition = DataState.Position;
try
{
DataState.DoMoveToRecord(Row);
return(DataState.GetValue(ColumnIndex));
}
finally
{
DataState.DoMoveToRecord(SavePosition);
}
}
public override void MoveToRecord(int aPosition)
{
ActualDataState.DoMoveToRecord(aPosition);
}
