/// <summary>
/// 返回指定类型的分页
/// </summary>
/// <param name="where">条件，不能为null</param>
/// <param name="order">排序，不能为null</param>
/// <param name="selector">返回对象，不能为null</param>
/// <param name="total">总数</param>
/// <param name="isAsc">是否升序，默认升序</param>
/// <param name="pageSize">每页数据大小，默认20</param>
/// <param name="pageIndex">当前页数，默认1</param>
/// <returns></returns>
public IList <S> GetEntityPageList <S, K>(Expression <Func <T, bool> > where, Expression <Func <T, K> > order,
Expression <Func <T, S> > selector, out int total, bool isAsc = true, int pageSize = 20, int pageIndex = 1)
where S : class, new()
{
return(_baseDal.GetEntityPageList(where, order, selector, out total, isAsc, pageSize, pageIndex));
}