Creating JSON on the fly with JObject

100

For some of my unit tests I want the ability to build up particular JSON values (record albums in this case) that can be used as input for the system under test.

I have the following code:

var jsonObject = new JObject();
jsonObject.Add("Date", DateTime.Now);
jsonObject.Add("Album", "Me Against The World");
jsonObject.Add("Year", 1995);
jsonObject.Add("Artist", "2Pac");

This works fine, but I have never really like the "magic string" syntax and would prefer something closer to the expando-property syntax in JavaScript like this:

jsonObject.Date = DateTime.Now;
jsonObject.Album = "Me Against The World";
jsonObject.Year = 1995;
jsonObject.Artist = "2Pac";

This question is tagged with c# json json.net

~ Asked on 2013-08-15 05:14:15

The Best Answer is


149

Well, how about:

dynamic jsonObject = new JObject();
jsonObject.Date = DateTime.Now;
jsonObject.Album = "Me Against the world";
jsonObject.Year = 1995;
jsonObject.Artist = "2Pac";

~ Answered on 2013-08-15 05:34:37


75

You can use the JObject.Parse operation and simply supply single quote delimited JSON text.

JObject  o = JObject.Parse(@"{
  'CPU': 'Intel',
  'Drives': [
    'DVD read/writer',
    '500 gigabyte hard drive'
  ]
}");

This has the nice benefit of actually being JSON and so it reads as JSON.

Or you have test data that is dynamic you can use JObject.FromObject operation and supply a inline object.

JObject o = JObject.FromObject(new
{
    channel = new
    {
        title = "James Newton-King",
        link = "http://james.newtonking.com",
        description = "James Newton-King's blog.",
        item =
            from p in posts
            orderby p.Title
            select new
            {
                title = p.Title,
                description = p.Description,
                link = p.Link,
                category = p.Categories
            }
    }
});

Json.net documentation for serialization

~ Answered on 2015-01-05 18:04:26


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