/// <summary>
/// 分页查询一个集合
/// </summary>
/// <param name="index">页码</param>
/// <param name="size">页大小</param>
/// <param name="wheres">条件匿名类</param>
/// <param name="orderField">排序字段</param>
/// <param name="isDesc">是否降序排序</param>
/// <returns>实体集合</returns>
public IEnumerable <Cart> QueryList(int index, int size, object wheres, string orderField, bool isDesc = true)
{
return(_dao.QueryList(index, size, wheres, orderField, isDesc));
}