public override void Map(IMapDataSource source, object sourceObject, int sourceIndex, IMapDataDestination destination, object destinationObject, int destinationIndex)
{
if(source.IsNull(sourceObject, sourceIndex))
{
destination.SetFloat(destinationObject, destinationIndex, 0);
}
else
{
destination.SetFloat(destinationObject, destinationIndex, Convert.ToSingle(source.GetString(sourceObject, sourceIndex)));
}
}