return from orderInfo in orderEntity.x_s_orderInfo
join oState in orderEntity.x_s_oStatuInfo
on orderInfo.oId equals oState.oId into t
select new OrderInfoModel
{
orderInfo= orderInfo,
// UserIDs = string.Join(",", t.Select(x => x.UserID.ToString()).ToArray())
};
关键在于 into
查询一对多关系
/// <summary>
/// 订单状态信息
/// </summary>
public IEnumerable<x_s_oStatuInfo> orderState { get; set; }
这里将订单状态改为集合类型
select new OrderInfoModel
{
orderInfo= orderInfo,
orderState=t.Select(u=>u)
};