Question

这是我的人index.cshtml的输出。我不知道如何在我的index.cshtml表中加入sql linq，有什么想法吗？

name    allapartments   active
john    1, 2, 3         no
mary    1               yes

公寓对象

id      name
1       LA downtown apts
2       NYC downtown apts

想要输出：

name    allapartments                           active
john    LA downtown apts, NYC downtown apts         no
mary    LA downtown apts                            yes

人员控制器

public ActionResult Index()
{
    var apartments = db.Apartments;
    var result = from item in Persontable
                 where apartments.All(x => item.allapartments.Contains(x))
                 select item;           
}

Answer 1

我想出了这个

void Main()
{
        var personTables = new List<Persontable>{
        new Persontable{Name = "John", AllApartments = new List<int>{1, 2, 3}, Active = false},
        new Persontable{Name = "Mary", AllApartments = new List<int>{1}, Active = true},
    };

    var apartments = new List<Apartment>{
        new Apartment { Id = 1, Name = "LA downtown apts"},
        new Apartment { Id = 2, Name = "NYC downtown apts"},
    };

    var result = personTables.Select( p => new PersontableAparment{
        Name = p.Name,
        AllApartmentsNames = apartments.Where(a => p.AllApartments.Contains(a.Id)).Select(x => x.Name).ToList(),
        Active = p.Active,
    });
}

public class Persontable
{
    public string Name { get; set;}
    public List<int> AllApartments { get; set;}
    public bool Active {get; set;}
}

public class Apartment
{
    public int Id {get; set;}
    public string Name {get; set;}
}

public class PersontableAparment 
{
    public string Name { get; set; }
    public List<string> AllApartmentsNames { get; set; }
    public bool Active { get; set; }

}

您可以结帐现场演示here。我假设

name    allapartments   active
john    1, 2, 3         no
mary    1               yes

是Persontable表中的数据。请注意，我使用PersontableApartment类来建模您想要的输出。如果您觉得有用，请将其作为已接受的答案。

将连接值与mvc中的对象进行比较

1 个答案: