How to select list of objects inside another list of objects

Question

public class Account
{
    public List<Memo1> Memos { get; set; }
}

public class Memo1
{
    public string Memo { get; set; }
    public DateTime AddDate { get; set; }
    public string UserID { get; set; }
    public List<MemoRefferances1> MemoRefferances { get; set; }
}

public class MemoRefferances1
{
    public string RefferanceName { get; set; }
    public string RefferanceValue { get; set; }
}

I want to select values of RefferanceName and RefferanceValue in MemoRefferances1 class. Please Help me.

Does this answer your question? Linq: List of lists to a long list — Nguyễn Văn Phong
– Nguyễn Văn Phong, Commented Feb 3, 2020 at 6:00
What are the properties available in MemoRefferances1 class. Only two which you mentioned in question or others as well, because SelectMany gives you entire object of IEnumerable<MemoRefferances1> class and if you need selective properties from that object then you need Select() as well — Prasad Telkikar
– Prasad Telkikar, Commented Feb 3, 2020 at 6:00

TheGeneral · Accepted Answer · 2020-02-03 05:44:16Z

2

You can use SelectMany to get all the MemoRefferances1 in Account.Memos

var results = someAccount.Memos.SelectMany(x => MemoRefferances);

answered Feb 3, 2020 at 5:44

TheGeneral

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Comments

Prasad Telkikar · Accepted Answer · 2020-02-03 05:44:56Z

2

You need SelectMany:

Projects each element of a sequence to an IEnumerable and flattens the resulting sequences into one sequence.

var allMemoRefferances = account.Memos.SelectMany(x = x.MemoRefferances);

answered Feb 3, 2020 at 5:44

Prasad Telkikar

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Comments

Furkan Öztürk · Accepted Answer · 2020-02-03 05:55:10Z

0

You can use the following code,

Account dummy = GetAccouns(); //Assume GetAccounts fills account data
var result = dummy.Memos.SelectMany(x => x.MemoRefferances).ToList();

answered Feb 3, 2020 at 5:55

Furkan Öztürk

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