Nested json to data table with linq and asp net c sharp


Working with nested JSON data can be a challenging task, especially when you need to convert it into a data . In this article, we will explore how to use LINQ and ASP.NET C# to convert nested JSON into a data table.


Before we dive into the code, make sure you have the prerequisites:

  • Visual Studio installed on your
  • Basic knowledge of C# and ASP.NET

Step 1: Setting up the Project

First, let's create a new ASP.NET project in Visual Studio. Open Visual Studio and follow these steps:

  1. Click on “File” > “New” > “Project”.
  2. Select “ASP.NET Web Application” and click “Next”.
  3. Choose a name and location for your project, then click “Create”.
  4. Select “Empty” template and check the “Web API” checkbox, then click “Create”.

Step 2: Adding Required Packages

In to work with JSON data, we need to add the Newtonsoft.Json package to our project. To do this, follow these steps:

  1. Right-click on your project in the Explorer and select “Manage Packages”.
  2. In the “Browse” tab, search for “Newtonsoft.Json” and click “Install” to add the package to your project.

Step 3: Creating the Data Model

Next, let's create a data model that represents the structure of our JSON data. For example, let's say we have the following nested JSON:

  "employees": [
      "id": 1,
      "name": "John Doe",
      "position": "Manager",
      "department": "Sales"
      "id": 2,
      "name": "Jane Smith",
      "position": "Developer",
      "department": "IT"

To represent this JSON structure, we can create a called “Employee” with properties for id, name, position, and department:

public class Employee
    public int Id { get; set; }
    public string Name { get; set; }
    public string Position { get; set; }
    public string Department { get; set; }

Step 4: Converting JSON to Data Table

Now that we have our data model, let's write the code to convert the nested JSON into a data table using LINQ. Here's an example:

string json = @"
  ""employees"": [
      ""id"": 1,
      ""name"": ""John Doe"",
      ""position"": ""Manager"",
      ""department"": ""Sales""
      ""id"": 2,
      ""name"": ""Jane Smith"",
      ""position"": ""Developer"",
      ""department"": ""IT""

DataTable dataTable = new DataTable();
dataTable.Columns.Add("Id", typeof(int));
dataTable.Columns.Add("Name", typeof(string));
dataTable.Columns.Add("Position", typeof(string));
dataTable.Columns.Add("Department", typeof(string));

JObject jsonObject = JObject.Parse(json);
JArray employeesArray = (JArray)jsonObject["employees"];

foreach (JObject employeeObject in employeesArray)
    Employee employee = new Employee
        Id = (int)employeeObject["id"],
        Name = (string)employeeObject["name"],
        Position = (string)employeeObject["position"],
        Department = (string)employeeObject["department"]

    dataTable.Rows.Add(employee.Id, employee.Name, employee.Position, employee.Department);

In this example, we first define a JSON string representing our nested JSON data. We then create a new data table and add columns to it on the properties of our data model.

Next, we parse the JSON string using the JObject class from the Newtonsoft.Json package. We extract the “employees” from the JSON object and iterate over each employee object.

Inside the loop, we create a new instance of the Employee class and populate its properties with values from the employee object. We then add a new row to the data table using the employee's properties.

Step 5: Using the Data Table

Now that we have the nested JSON into a data table, we can use it in our ASP.NET application. For example, we can bind the data table to a GridView control to display the data:

GridView gridView = new GridView();
gridView.DataSource = dataTable;

In this example, we create a new instance of the GridView control and set its DataSource property to our data table. We then call the DataBind method to bind the data table to the GridView and display the data.


In this article, we have explored how to convert nested JSON into a data table using LINQ and ASP.NET C#. By following the steps outlined above, you should now be able to handle nested JSON data and convert it into a format that is more easily consumable in your ASP.NET applications.

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