How to Convert a JSON String to a C# Object List Using JSON.NET?

Convert a JSON String to a C# Object List Using JSON.NET

Many developers encounter the need to convert JSON strings into C# objects for data manipulation and processing. This task can be made easier with the help of JSON.NET, a popular library for working with JSON data in .NET applications.

Suppose you have a JSON string containing an array of objects. The objects in this array possess specific properties that correspond to the properties of a defined C# class, known as MatrixModel. To convert this JSON string into a list of MatrixModel objects, you can follow these steps:

1. Convert JSON to Class: Visit json2csharp.com, a website that allows you to convert JSON data into C# classes. Paste the JSON string into the provided box and generate the code.
2. Deserialize JSON: Using Newtonsoft's JSON.NET, deserialize the JSON string into a list of MatrixModel objects:

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

Example JSON:

    "[
      {
        "Question": {
          "QuestionId": 49,
          "QuestionText": "Whats your name?",
          "TypeId": 1,
          "TypeName": "MCQ",
          "Model": {
            "options": [
              {
                "text": "Rahul",
                "selectedMarks": "0"
              },
              {
                "text": "Pratik",
                "selectedMarks": "9"
              },
              {
                "text": "Rohit",
                "selectedMarks": "0"
              }
            ],
            "maxOptions": 10,
            "minOptions": 0,
            "isAnswerRequired": true,
            "selectedOption": "1",
            "answerText": "",
            "isRangeType": false,
            "from": "",
            "to": "",
            "mins": "02",
            "secs": "04"
          }
        },
        "CheckType": "",
        "S1": "",
        "S2": "",
        "S3": "",
        "S4": "",
        "S5": "",
        "S6": "",
        "S7": "",
        "S8": "",
        "S9": "Pratik",
        "S10": "",
        "ScoreIfNoMatch": "2"
      },
      {
        "Question": {
          "QuestionId": 51,
          "QuestionText": "Are you smart?",
          "TypeId": 3,
          "TypeName": "True-False",
          "Model": {
            "options": [
              {
                "text": "True",
                "selectedMarks": "7"
              },
              {
                "text": "False",
                "selectedMarks": "0"
              }
            ],
            "maxOptions": 10,
            "minOptions": 0,
            "isAnswerRequired": false,
            "selectedOption": "3",
            "answerText": "",
            "isRangeType": false,
            "from": "",
            "to": "",
            "mins": "01",
            "secs": "04"
          }
        },
        "CheckType": "",
        "S1": "",
        "S2": "",
        "S3": "",
        "S4": "",
        "S5": "",
        "S6": "",
        "S7": "True",
        "S8": "",
        "S9": "",
        "S10": "",
        "ScoreIfNoMatch": "2"
      }
    ]"

Example Deserialized Object:

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

Now, you can easily work with the deserialized MatrixModel list, accessing and manipulating the data as needed in your C# application.

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