How can i read the json file in C#?

Question

I want to retrieve the Id, profileIconId etc.. in variables or in one array.
Here is the json:

{"kiko298": { "id": 23076700, "name": "kiko298", "profileIconId": 748, "revisionDate": 1419104454000, "summonerLevel": 30 }}

Vulpes · Answer

Here's one way of doing it without leaving the .NET framework: using System; using System.IO; using System.Text; using System.Runtime.Serialization; using System.Runtime.Serialization.Json; namespace ParseJson { class Program { static void Main(string[] args) { string json = "{"kiko298": { "id": 23076700, "name": "kiko298", "profileIconId": 748, "revisionDate": 1419104454000, "summonerLevel": 30 }}"; byte[] data = Encoding.UTF8.GetBytes(json); var ms = new MemoryStream(data); var dcjs = new DataContractJsonSerializer(typeof(A)); A a = (A)dcjs.ReadObject(ms); Console.WriteLine(a.Kiko298); Console.ReadKey(); } } [DataContract] public class A { [DataMember(Name = "kiko298")] public B Kiko298 { get; set; } } [DataContract] public class B { public B() { } [DataMember(Name = "id")] public int Id { get; set; } [DataMember(Name = "name")] public string Name { get; set; } [DataMember(Name = "profileIconId")] public int ProfileIconId { get; set; } [DataMember(Name = "revisionDate")] public long RevisionDate { get; set; } [DataMember(Name = "summonerLevel")] public int SummonerLevel { get; set; } public override string ToString() { return String.Format("Id = {0}
Name = {1}
Profile Icon Id = {2}
Revision Date = {3}
Summoner Level = {4}", Id, Name, ProfileIconId, RevisionDate, SummonerLevel); } } } The output is: Id = 23076700 Name = kiko298 Profile Icon Id = 748 Revision Date = 1419104454000 Summoner Level = 30 As I don't know what these objects represent, I've just called them class A and class B for now but you can, of course, call them what you like.

Francisco Leal · Answer

Oh, u just gave me an idea that probably will work. Thanks very much!

Vulpes · Answer

Unfortunately, that won't work as attribute arguments must be compile time constants. The best I can suggest would be to use a regular expression to replace A's property name within the json string, whatever it might be, with "kiko298" BEFORE it's deserialized. For example, this is working OK: using System; using System.IO; using System.Text; using System.Runtime.Serialization; using System.Runtime.Serialization.Json; using System.Text.RegularExpressions; namespace ParseJson { class Program { static void Main(string[] args) { string json = "{\" whatever \": { \"id\": 23076700, \"name\": \"kiko298\", \"profileIconId\": 748, \"revisionDate\": 1419104454000, \"summonerLevel\": 30 }}"; Regex r = new Regex(@""".*?"""); json = r.Replace(json, @"""kiko298""", 1); byte[] data = Encoding.UTF8.GetBytes(json); var ms = new MemoryStream(data); var dcjs = new DataContractJsonSerializer(typeof(A)); A a = (A)dcjs.ReadObject(ms); Console.WriteLine(a.Kiko298); Console.ReadKey(); } } // etc }

Francisco Leal · Answer

[EDITED] Ok i've found the reference but the first kiko298 may change, depending of the json im reading. Is there a way to make something like this: [DataContract] public class A { [DataMember(Name = File.ReadAllText(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData) + "\ID.li"))] public B Kiko298 { get; set; } } because i need it to change according to the json i read!

Vulpes · Answer

Incidentally, if you don't have one already, a reference needs to be added to System.Runtime.Serialization.dll for the above code to work (.NET 3.5 or later).

Francisco Leal · Answer

Thanks very much!!