How to parse simple json object without extra libraries in c#?

Question

This is the json object I want to parse and turn into a Dictionary:

[{"Id":100, "Name":"Rush", "Category":"Prog"},
 {"Id":200, "Name":"Led Zeppellin", "Category":"Rock"},
 {"Id":300, "Name":"Grumpy Lettuce", "Category":"Weird"}
]

I'd like to get the Id and Name from that into a Dictionary<int, string>()

Thanks!

use JavaScriptSerializer.Deserialize - msdn.microsoft.com/en-us/library/ee191864.aspx — Popo
– Popo, Commented May 17, 2013 at 22:47
I had a similar question here. But this does require the JSON.Net library. — Evan L
– Evan L, Commented May 17, 2013 at 22:47

Jan Dörrenhaus · Accepted Answer · 2013-05-17 23:13:47Z

1

There is rudimentary JSON support in the .NET framework: http://msdn.microsoft.com/en-us/library/system.web.script.serialization.javascriptserializer.aspx

However, I would recommend using a specialized library, JSON.NET: like http://james.newtonking.com/pages/json-net.aspx

answered May 17, 2013 at 23:13

Jan Dörrenhaus

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1 Comment

tigrou Over a year ago

+1 and converting to Dictionary can be done using ToDictionary() extension : msdn.microsoft.com/en-us/library/…

smartcaveman · Accepted Answer · 2013-05-17 23:41:11Z

  void Main()
  {
      const string thatJsonYouWrote = @"[{""Id"":100, ""Name"":""Rush"", ""Category"":""Prog""}, {""Id"":200, ""Name"":""Led Zeppellin"", ""Category"":""Rock""}, {""Id"":300, ""Name"":""Grumpy Lettuce"", ""Category"":""Weird""}]";
      IDictionary<int,string> thatThingYouWanted = ParseJsonExample(thatJsonYouWrote);
  }

  IDictionary<int,string> ParseJsonExample(string json)
  { 
      object[] items = ((object[])new JavaScriptSerializer().DeserializeObject(json));
      return items
         .Cast<Dictionary<string,object>>()
         .ToDictionary(_ => Convert.ToInt32(_["Id"]), _ => _["Name"].ToString());
  }

Note: you will need to reference System.Web.Extensions.dll and import the System.Web.Script.Serialization namespace

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