How to initialize a list of dictionaries

Question

How can I initialize a System.Collections.Generic.List of System.Collections.Generic.Dictionary objects using Collection Initializers?

When asking a question, it's always a good idea to show what you've tried and what went wrong. In this case, it's not clear whether you know how to use collection initializers to a) initialize a list; b) initialize a dictionary. If you know both of those, combining them is easy. If you don't know one of them, *that's* what your question should be about. In this case, it's not really clear why you would ask the question and self-answer... it's not a question which is likely to come up, IMO. — Jon Skeet, Nov 12 '15 at 16:34
While it's fine to add your own question and answer, it *isn't* fine to just keep adding endless permutations of answered scenarios. The answer to "how to initialize a list of dictionaries" is to look at the questions for "how to initialize a list" and "how to initialize a dictionary". There's nothing special about a list of dictionaries in particular. — Luaan, Nov 12 '15 at 16:46
Hi, Luaan. I understand that there's nothing special for you, probably used to c# semantics, but defnitely it's not the same. Dictionary is essentially different from List>. So, I strongly disagree of your moderation. — Miguel Pragier, Nov 13 '15 at 18:50

score 6 · Accepted Answer · edited Nov 12 '15 at 16:39

6

List<Dictionary<string, object>> listaDeDicionarios = new List<Dictionary<string, object>>()
{
    new Dictionary<string,object>()
    {
        {"chave1","valor um"},
        {"chave2","dois"},
        {"chave3",true}
    },
    new Dictionary<string,object>()
    {
        {"chave4",4},
        {"chave5",DateTime.Now},
        {"chave6",long.MaxValue},
        {"chave7","..."}
    },
    new Dictionary<string,object>()
    {
        {"chave8","utf string áéí / &url"},
        {"chave9",null},
        {"chave10",String.Empty},
        {"chave11",new List<string>(){"aaa","bbb","ccc","oh my god, it's a miracle!"}}
    }
};

edited Nov 12 '15 at 16:39

M.kazem Akhgary

18,645
8
57
118

answered Nov 12 '15 at 16:32

Miguel Pragier

135
2
13

4

You should edit the question and add this code to it. – maniak1982 Nov 12 '15 at 16:34
3

@maniak1982: Why? Answering your own question is perfectly fine and encouraged on SO. – Heinzi Nov 12 '15 at 16:42
@M.kazemAkhgary Yes, that looks like a list of dictionaries to me! – Darren Gourley Nov 12 '15 at 16:47
It wasn't clear whether it was the answer or his existing code. It's not marked as the answer, after all. – maniak1982 Nov 12 '15 at 16:55
1

@maniak1982, you cannot mark your own as an answer before (I believe) 24 hours. – Broots Waymb Nov 12 '15 at 17:26
Hi, all. The goal was, only to share some knowledge, indeed. If I had that question, I believe that others could have too. When the regular time restriction expire, I'll check my own answer. Unless some better answer appears :-) – Miguel Pragier Nov 13 '15 at 18:56

score 1 · Answer 2 · answered Nov 12 '15 at 16:44

1

If you are using C# 6.0 you can use:

var myDict = new Dictionary<int, string>
{
    [1] = "Pankaj",
    [2] = "Pankaj",
    [3] = "Pankaj"
};

answered Nov 12 '15 at 16:44

Breno Queiroz

174
6

How to initialize a list of dictionaries

2 Answers2