How to Parse Json list in VB.NET Newtonsoft - json

Question

I receive from a webservice, the following JSON:
[ {"lat": 42.41375, "user_id": 762, "user": "John", "lng": 23.02187}, {"lat": 42.46835, "user_id": 675, "user": "Mike", "lng": 23.02612}, {"lat": 42.85672, "user_id": 654, "user": "Jane", "lng": 23.01029}, {"lat": 42.46876, "user_id": 687, "user": "Luke", "lng": 23.02676} ]
I want to add this information using VB.net, row by row, to a DataGridView.
I'm new to JSON.net.
How to loop through the whole list?
How to go about parsing it?

Answer 1

As per as my knowledge there are multiple ways to do it, i prefer following way which is more easy ,straight and maintainable
there is JSON serializer and deserializer provided inbuilt in .net framework, requirement for that is, you have to create classes which will map to your JSON. you can have a look at or http://msdn.microsoft.com/en-us/library/system.web.script.serialization.javascriptserializer.deserialize.aspx
In the above case you have to create your class like below
class UserLatLang
{
public long lat { get;set;}
public long lng { get;set;}
public long user_id {get;set;}
public string user {get;set;}
}
after this you can
var serializer = new JavaScriptSerializer();
var listofUserLatLang = serializer.Deserialize<UserLatLang>(responseText);
and you will get a list of UserLatLang in listofUserLatLang
or you can also refer class from http://msdn.microsoft.com/en-us/library/bb412179.aspx
Once you get list of UserLatLang you can directly bind it to DataGrid
Hope this solves your problem
thanks,
Sandesh Daddi