Question

对不起,我需要查询一个收藏品, 并归还祖父母、父母和孙子女, 以孙子女财产为基础。

例如,在下面的对象下,我想得到引号、比率(父母)和计划(大子女),只要条件与计划ID相符。

public class Quote
{
    public int Id { get; set; }
    public string Type { get; set; }
    public string ParentType { get; set; }
    public decimal ValueMax { get; set; }
    public virtual ICollection<Rate> Rates { get; set; }
}

public class Rate
{
    public int Id { get; set; }
    public decimal ValueMax { get; set; }
    public ICollection<Plan> Plans { get; set; }
}

public class Plan

    public int Id { get; set; }
    public decimal Price { get; set; }
}

Answer 1

你应该能够做这样的事来得到符合任何标准的计划以及他们的父母和祖父母的物品

// results is an anonymous type with properties Quote, Rate, Plan
var results = from q in quotes
    from r in q.Rates
    from p in r.Plans
    where p.Id < 500 /* whatever criteria */
    select new 
    {
        Quote = q,
        Rate = r,
        Plan = p
    };

友情链接