Convert JSON String to JSON Object c#

I have this String stored in my database:

str = "{ "context_name": { "lower_bound": "value", "upper_bound": "value", "values": [ "value1", "valueN" ] } }" 

This string is already in the JSON format but I want to convert it into a JObject or JSON Object.

JObject json = new JObject(); 

I tried the json = (JObject)str; cast but it didn't work so how can I do it?

10 Answers

JObject defines method Parse for this:

JObject json = JObject.Parse(str); 

You might want to refer to Json.NET documentation.

if you don't want or need a typed object try:

using Newtonsoft.Json; // ... dynamic json = JsonConvert.DeserializeObject(str); 

or try for a typed object try:

Foo json = JsonConvert.DeserializeObject<Foo>(str) 

This works

 string str = "{ 'context_name': { 'lower_bound': 'value', 'pper_bound': 'value', 'values': [ 'value1', 'valueN' ] } }"; JavaScriptSerializer j = new JavaScriptSerializer(); object a = j.Deserialize(str, typeof(object)); 

there's an interesting way to achive another goal which is to have a strongly type class base on json with a very powerfull tools that i used few days ago for first time to translate tradedoubler json result into classes

Is a simple tool: copy your json source paste and in few second you will have a strongly typed class json oriented . In this manner you will use these classes which is more powerful and simply to use.

You can try like following:

string output = JsonConvert.SerializeObject(jsonStr); 

This works for me using JsonConvert

var result = JsonConvert.DeserializeObject<Class>(responseString); 

If your JSon string has "" double quote instead of a single quote ' and has \n as a indicator of a next line then you need to remove it because that's not a proper JSon string, example as shown below:

 SomeClass dna = new SomeClass (); string response = wc.DownloadString(url); string strRemSlash = response.Replace("\"", "\'"); string strRemNline = strRemSlash.Replace("\n", " "); // Time to desrialize it to convert it into an object class. dna = JsonConvert.DeserializeObject<SomeClass>(@strRemNline); 

This does't work in case of the JObject this works for the simple json format data. I have tried my data of the below json format data to deserialize in the type but didn't get the response.

For this Json

{ "Customer": { "id": "Shell", "Installations": [ { "id": "Shell.Bangalore", "Stations": [ { "id": "Shell.Bangalore.BTM", "Pumps": [ { "id": "Shell.Bangalore.BTM.pump1" }, { "id": "Shell.Bangalore.BTM.pump2" }, { "id": "Shell.Bangalore.BTM.pump3" } ] }, { "id": "Shell.Bangalore.Madiwala", "Pumps": [ { "id": "Shell.Bangalore.Madiwala.pump4" }, { "id": "Shell.Bangalore.Madiwala.pump5" } ] } ] } ] } } 

In a situation where you are retrieving a list of objects of a certain entity from your api, your response string may look like this:

[{"id":1,"nome":"eeee","username":null,"email":null},{"id":2,"nome":"eeee","username":null,"email":null},{"id":3,"nome":"Ricardo","username":null,"email":null}] 

In this situation you may want an array of Jason objects and cycle through them to populate your c# variable. I've done like so:

var httpResponse = await Http.GetAsync($"api/{entidadeSelecionada}"); List<List<string[]>> Valores = new(); if (httpResponse.IsSuccessStatusCode) { //totalPagesQuantity = int.Parse(httpResponse.Headers.GetValues("pagesQuantity").FirstOrDefault()); //Aqui tenho que colocar um try para o caso de ser retornado um objecto vazio var responseString = await httpResponse.Content.ReadAsStringAsync(); JArray array = JArray.Parse(responseString); foreach (JObject objx in array.Children<JObject>()) { List<string[]> ls = new(); foreach (JProperty singleProp in objx.Properties()) { if (!singleProp.Name.Contains("_xyz")) { string[] val = new string[2]; val[0] = singleProp.Name; val[1] = singleProp.Value.ToString(); ls.Add(val); } } Valores.Add(ls); } } return Valores; 

I achieved this solution by the @Andrei answer.

string result = await resp.Content.ReadAsStringAsync(); List<ListView11> _Resp = JsonConvert.DeserializeObject<List<ListView11>>(result); //List<ListView11> _objList = new List<ListView11>((IEnumerable<ListView11>)_Resp); IList usll = _Resp.Select(a => a.lttsdata).ToList(); // List<ListViewClass> _objList = new List<ListViewClass>((IEnumerable<ListViewClass>)_Resp); //IList usll = _objList.OrderBy(a=> a.ReqID).ToList(); Lv.ItemsSource = usll;