How to parse json string in c#

Question

How can i parse a json string in c# controller

public ActionResult GetAjaxSession(string search)
{
...
}

Variable which containt the json string :

search

The Json string :

[{"id_employe":"35"},{"id_employe":"80"},{"id_employe":"136"},{"id_employe":"140"}]

I want to get all id_employe from the string

Answer 1

Malior's approach is perfectly fine, it's a typed approach. I'd like to mention an alternative way, using Linq and dynamic:

var jsonText="[{\"id_employe\":\"35\"},{\"id_employe\":\"80\"},"
             +"{\"id_employe\":\"136\"},{\"id_employe\":\"140\"}]";
var objects = JsonConvert.DeserializeObject<List<dynamic>>(jsonText);
var values = objects.Select(s=>s.id_employe).ToList();

Fiddle

This will create a list, so values contains the following elements:

35,80,136,140

Because it is dynamic, you don't need to declare an extra class.

Note that both approaches will throw a JsonReaderException if there is anything wrong with the JSON string (e.g. missing [ etc.). And if the property name isn't found it can throw a RuntimeBinderException - so you should use a try ... catch block.

Answer 2

But parsing would be the right way, to get the right data out of your string. Example with using Newtonsoft.Json:

var objects = JsonConvert.DeserializeObject<List<MyObj>>(jsonText);

With the class:

public class MyObj
{
    public string id_employe { get; set; }
}