/// <summary>
/// 得到指定包裹类型的道具，并按照位置下标排序
/// </summary>
/// <param name="package"></param>
/// <returns></returns>
public IEnumerable <SaveItem> Where(ItemLocation.PackageType package)
{
return(items.Where(i => i.loc.type == package)
.OrderBy(i => i.baseid).ThenBy(i => i.num));
}
public SaveItem this[ItemLocation.PackageType type, int index] {
get { return(items.Find(i => i.loc.type == type && i.loc.index == index)); }
}