Getting property/object-name from JSON-List in C#

Question

I have the following JSON-String:

{"object":{"4711":{"type":"volume","owner":"john doe","time":1426156658,"description":"Jodel"},"0815":{"type":"fax","owner":"John Doe","time":1422900028,"description":"","page_count":1,"status":"ok","tag":["342ced30-7c34-11e3-ad00-00259073fd04","342ced33-7c34-11e3-ad00-00259073fd04"]}},"status":"ok"}

A human readable screenshot of that data:

JSON-Data

I want to get the Values "4711" and "0815" of that data. I iterate through the data with the following code:

JObject tags = GetJsonResponse();
var objectContainer = tags.GetValue("object");
if (objectContainer != null) {
  foreach (var tag in objectContainer) {
    var property=tag.HowToGetThatMagicProperty();
  }
}

At the position "var property=" I want to get the values "4711".

I could just use String-Manipulation

string tagName = tag.ToString().Split(':')[0].Replace("\"", string.Empty);

but there must be a better, more OOP-like way

You could deserialize directly into a model of said object, or if your in Model View Controller, you could do a JsonResult with a parameter of the Model to actually pass the information into. — Greg
– Greg, Commented Mar 17, 2015 at 15:30
@Greg No MVC (but I understand what you meant) :) Because I am only interested in that single string-value I do not want to create objects for the response. — Ole Albers
– Ole Albers, Commented Mar 17, 2015 at 15:31

Andrew Whitaker · Accepted Answer · 2015-03-17 15:57:17Z

1

If you get the "object" object as a JObject explicitly, you can access the Key property on each member inside of the JObject. Currently objectContainer is a JToken, which isn't specific enough:

JObject objectContainer = tags.Value<JObject>("object");

foreach (KeyValuePair<string, JToken> tag in objectContainer)
{
    var property = tag.Key;

    Console.WriteLine (property); // 4711, etc.
}

JObject exposes an implementation of IEnumerable.GetEnumerator that returns KeyValuePair<string, JToken>s containing the name and value of each property in the object.

Example: https://dotnetfiddle.net/QbK6MU

edited Mar 17, 2015 at 15:57

answered Mar 17, 2015 at 15:48

Andrew Whitaker

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Comments

Jordan Coulam · Accepted Answer · 2015-03-17 15:44:54Z

1

I got the results using this

        foreach (var tag in objectContainer)
        {
            var property = tag.Path.Substring(tag.Path.IndexOf(".") + 1);
            Console.WriteLine(property);
        }
    }
    Console.ReadLine();

}

answered Mar 17, 2015 at 15:44

Jordan Coulam

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2 Comments

Jordan Coulam Over a year ago

This is similar to OP's method using string manipulation, Didn't realize it was edited at the time of writing my answer

Ole Albers Over a year ago

Sorry for that. :) But your answer is a "bit" nicer as it does not uses .ToString()

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