Convert JSON String to C# Object List

Convert Json String to C# Object List

You can use json2csharp.com to Convert your json to object model

• Go to json2csharp.com
• Past your JSON in the Box.
• Clik on Generate.
• You will get C# Code for your object model
• Deserialize by var model = JsonConvert.DeserializeObject<RootObject>(json); using NewtonJson

Here, It will generate something like this:

public class MatrixModel
{
    public class Option
    {
        public string text { get; set; }
        public string selectedMarks { get; set; }
    }

    public class Model
    {
        public List<Option> options { get; set; }
        public int maxOptions { get; set; }
        public int minOptions { get; set; }
        public bool isAnswerRequired { get; set; }
        public string selectedOption { get; set; }
        public string answerText { get; set; }
        public bool isRangeType { get; set; }
        public string from { get; set; }
        public string to { get; set; }
        public string mins { get; set; }
        public string secs { get; set; }
    }

    public class Question
    {
        public int QuestionId { get; set; }
        public string QuestionText { get; set; }
        public int TypeId { get; set; }
        public string TypeName { get; set; }
        public Model Model { get; set; }
    }

    public class RootObject
    {
        public Question Question { get; set; }
        public string CheckType { get; set; }
        public string S1 { get; set; }
        public string S2 { get; set; }
        public string S3 { get; set; }
        public string S4 { get; set; }
        public string S5 { get; set; }
        public string S6 { get; set; }
        public string S7 { get; set; }
        public string S8 { get; set; }
        public string S9 { get; set; }
        public string S10 { get; set; }
        public string ScoreIfNoMatch { get; set; }
    }
}

Then you can deserialize as:

var model = JsonConvert.DeserializeObject<List<MatrixModel.RootObject>>(json);

convert json to c# list of objects

Your c# class mapping doesn't match with json structure.

Solution :

class MovieCollection {
        public IEnumerable<Movie> movies { get; set; }
}

class Movie {
        public string title { get; set; }
}

class Program {
        static void Main(string[] args)
        {
                string jsonString = @"{""movies"":[{""id"":""1"",""title"":""Sherlock""},{""id"":""2"",""title"":""The Matrix""}]}";
                JavaScriptSerializer serializer = new JavaScriptSerializer();
                MovieCollection collection = serializer.Deserialize<MovieCollection>(jsonString);
        }
}

Cannot convert JSON string to List of object

This is because you need a container class at the top that has this list of orders as a property inside of it:

public class MyData
{
     public List<FoodItem> Orders { get; set; }
{

var data = JsonConvert.DeserializeObject<MyData>(strProductsInCart);
var items = data.Orders;

Also, make sure you have public properties that match the name in the JSON. They can be Pascal case, too.

How to convert a Json string to List in c#

If you don't want to create a class :

You can use JObject.Parse() method for deserializing dynamically.

Convert JSON String To C# Object

It looks like you're trying to deserialize to a raw object. You could create a Class that represents the object that you're converting to. This would be most useful in cases where you're dealing with larger objects or JSON Strings.

For instance:

  class Test {

      String test; 

      String getTest() { return test; }
      void setTest(String test) { this.test = test; }

  }

Then your deserialization code would be:

   JavaScriptSerializer json_serializer = new JavaScriptSerializer();
   Test routes_list = 
          (Test)json_serializer.DeserializeObject("{ \"test\":\"some data\" }");

More information can be found in this tutorial:
http://www.codeproject.com/Tips/79435/Deserialize-JSON-with-Csharp.aspx

Deserialize json to List object in C#

There is an error in your json - it's missing a closing ] for the array (I'll assume it's a typo).

The real problem is that you need a wrapper class to represent the data node of the json which should contain a list (or array) of ExPositions. The makerPositions and takerPositions should also become lists (or arrays) too. Add the following class and update the position properties of ExPositions:

public class Data
{
    public List<ExPositions> data { get; set; }
}

// change positions to use a List too
public class ExPositions
{
    ...
    public List<Positions> makerPositions { get; set; }
    public List<Positions> takerPositions { get; set; }
}

Then you can deserialize using:

var result = JsonSerializer.Deserialize<Data>(json);

It's not clear where the ""total"": 2 property should be in your models (it's not clear in the json because of the issue I mentioned), you could add it to the Data class above (if it belongs there).

Online demo

What is best way to convert json string into array of objects?

I recommend to install Newtonsoft.Json via the NuGet package manager. Then decorate the members of the POCO class with the JsonProperty attribute to tell the serializer which property matches to a specific JSON key:

public class MyJsonObject
{
  [JsonProperty("Value")]
  string Value { get; set; }

  [JsonProperty("Name")]
  string Name { get; set; }
}

You can the deserialize the JSON to a corresponding object instance:

var jsonString = "[{\"Value\": \"1\", \"Name\": \"One\"}, {\"Value\": \"2\", \"Name\": \"Two\"}]";
List<MyJsonObject> myJsonObjects = JsonConvert.DeserializeObject<List<MyJsonObject>>(jsonString);

Convert Json to explicit new object, List initialization c#

You can use online services like https://www.jsonutils.com/

or

function Convert(jsonStr, classNr) {

  var i = classNr == undefined ? 0 : classNr;

  var str = "";

  var json = JSON.parse(jsonStr);

  for (var prop in json) {

    if (typeof(json[prop]) === "number") {

      if (json[prop] === +json[prop] && json[prop] !== (json[prop] | 0)) {

        str += prop + " = " + json[prop] + "M, ";

      } else {

        str += prop + " = " + json[prop] + ", ";

      }

    } else if (typeof(json[prop]) === "boolean") {

      str += prop + " = " + json[prop] + ", ";

    } else if (typeof(json[prop]) === "string") {

      str += prop + ' = "' + json[prop] + '", ';

    } else if (json[prop] == null || json[prop] == undefined) {

      str += prop + ' = null, ';

    } else if (typeof(json[prop]) === "object") {

      str += prop + " = " + Convert(JSON.stringify(json[prop]), i++) + ", ";

    }

  }

  if (str.endsWith(', ')) {

    str = str.substring(0, str.length - 2);

  }

  return "new Class" + i + "{ " + str + " }";

}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>

<textarea id="tin" cols="100" rows="6">

 {"A":12}

</textarea>

<input type="button" value="Just do it!" onclick="$('#result').text(Convert($('#tin').val()));" />

<div id="result"></div>

Convert json array into List of Objects

Based on the shown JSON array and the error message indicating that you are trying to convert an array to a single object, it looks like you were suppose to do

var RoleList = JsonConvert.DeserializeObject<List<UserAddRoleListViewModel>>(Input.RoleList);

in order to parser the JSON correctly into a List<>

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