How to store an array of string in c#?

Question

Either

HashSet<string> aaa { get; set; }

or

List<string> aaa { get; set; }

or

string[] aaa { get; set; }

also store as:

"aaa": {
     "0": "bbb",
     "1": "ccc" 
},

can't store as

"aaa": ["bbb", "ccc"]

?

Jesse Sweetland · Accepted Answer · 2013-09-04 17:43:20Z

2

The following code with the latest 10gen drivers produces the document in the format you're looking for:

public class MyDocument
{
    public int id { get; set; }
    public string[] aaa { get; set; }
}

class Program
{
    private static void Main(string[] args)
    {
        var client = new MongoClient("mongodb://localhost");
        var server = client.GetServer();
        var db = server.GetDatabase("temp");
        var coll = db.GetCollection("myDocuments");
        var mydoc = new MyDocument
            {
                id = 1,
                aaa = new[] {"bbb", "ccc"}
            };
        coll.Save(mydoc);
    }
}

Here is the resulting document:

/* 0 */
{
    "_id" : 1,
    "aaa" : [ 
        "bbb", 
        "ccc"
    ]
}

IList and List also work. Do you have any custom BSON serialization annotations? Do you have custom class maps?

answered Sep 4, 2013 at 17:43

Jesse Sweetland

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2 Comments

zicjin Over a year ago

wow,, get result of your case is also: "_id": NumberInt(1), "aaa": { "0": "bbb", "1": "ccc" }. i use nuget "Install-Package mongocsharpdriver" to new console applaction

zicjin Over a year ago

sorry. i found the crux. i use an html mongo client rockmongo, it has display problem for array.

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