Read JSON file and Convert data into HTML table in Asp.Net MVC using C# and VB

asp.net json

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Tools you can use

There are many ways you can display data extracted from a JSON file, in your Asp.Net MVC web application. For example, you can use a WebGrid to display (or manipulate) data. Or, you can just create an HTML table and show the extracted JSON data in tabular format using the view template.

The codes are C# and Visual Basic.

read json data from file and display in html table in asp.net mvc

The JSON

Below is a sample JSON, save the data in a file with the name birds.json and "Save the file" inside the Project folder.

[
    {
    "ID": "001",
    "Name": "Eurasian Collared-Dove",
    "Type": "Dove" },
  
    {
    "ID": "002",
    "Name": "Bald Eagle",
    "Type": "Hawk" },
  
    {
    "ID": "003",
    "Name": "Cooper's Hawk",
    "Type": "Hawk" },
    {
    "ID": "004",
    "Name": "Bell's Sparrow",
    "Type": "Sparrow" },

    {
    "ID": "005",
    "Name": "Mourning Dove",
    "Type": "Dove"  },

    {
    "ID": "006",
    "Name": "Rock Pigeon",
    "Type": "Dove"  }
]

Or, you can use the data from this page.

Next, create a new (MVC) project and name it "mvcProject".

Model

In the Model Class add some properties, similar to the "nodes" in the JSON file.
Note: Make sure that the "property" names are similar to nodes in the JSON file.

C# Code

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace mvcProject.Models
{
    public class modelBirds
    {
        public int ID { get; set; }
        public string Name { get; set; }
        public string Type { get; set; }
    }
}

Visual Basic Code

Option Explicit On

Public Class modelBirds
    Public Property ID() As Integer
        Get
            Return m_ID
        End Get
        Set(value As Integer)
            m_ID = value
        End Set
    End Property
    Private m_ID As Integer

    Public Property Name() As String
        Get
            Return m_Name
        End Get
        Set(value As String)
            m_Name = value
        End Set
    End Property
    Private m_Name As String

    Public Property Type() As String
        Get
            Return m_Type
        End Get
        Set(value As String)
            m_Type = value
        End Set
    End Property
    Private m_Type As String
End Class
Controller

A controller is where we'll extract or fetch data from the JSON file and populate a List object with the data.

But first, we'll have import two "namespaces" in our Controller. See the two namespaces are highlighted in below code.

C# Code

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

using mvcProject.Models;
using System.IO;
using System.Web.Script.Serialization;

namespace mvcProject.Controllers
{
    public class birdsController : Controller
    {
        //
        // GET: /birds/

        //public ActionResult Index()
        //{
        //    return View();
        //}

        List<modelBirds> theBirds = new List<modelBirds>();

        public ActionResult viewBirds(modelBirds list)
        {
            string sJSONfile;
            sJSONfile = Server.MapPath("birds.json");  // The json file.

            using (StreamReader sr = new StreamReader(sJSONfile))
            {
                JavaScriptSerializer json = new JavaScriptSerializer();
                theBirds = json.Deserialize<List<modelBirds>>(sr.ReadToEnd());
            }

            return View(theBirds);
        }
    }
}

Visual Basic Code

Option Explicit On

Imports System.IO
Imports System.Web.Script.Serialization

Namespace mvcProject
    Public Class birdsController
        Inherits System.Web.Mvc.Controller

        '
        ' GET: /birds

        'Function Index() As ActionResult
        '    Return View()
        'End Function

        Dim theBirds As New List(Of modelBirds)()

        Function viewBirds(list As modelBirds) As ActionResult

            Dim sJSONfile As String
            sJSONfile = Server.MapPath("birds.json")

            Using sr As New StreamReader(sJSONfile)
                Dim json As JavaScriptSerializer = New JavaScriptSerializer()
                theBirds = json.Deserialize(Of List(Of modelBirds))(sr.ReadToEnd())
            End Using

            Return View(theBirds)
        End Function

    End Class
End Namespace
View

Finally, we'll create the View.

C# Code

@using mvcProject.Models;
@model IEnumerable<modelBirds>
 
<html>
<body>
    <table cellpadding="0" cellspacing="0">
        <tr>
            <th>CustomerId</th>
            <th>Name</th>
            <th>Country</th>
        </tr>
        @foreach (modelBirds bird in Model)
        {
            <tr>
                <td>@bird.ID</td>
                <td>@bird.Name</td>
                <td>@bird.Type</td>
            </tr>
        }
    </table>
</body>
</html>

Visual Basic Code

@ModelType IEnumerable(Of mvcProject.modelBirds)

<html>
<body>
    <table class="table">
        <tr>
            <th>ID</th>
            <th>Bird Name</th>
            <th>Type of Bird</th>
        </tr>
        @If Model IsNot Nothing Then
            @For Each bird In Model
                @<tr>
                    <td>@bird.ID</td>
                    <td>@bird.Name</td>
                    <td>@bird.Type</td>
                </tr>
            Next            
        End If
    </table>
</body>
</html>

That's it. Now, run the application.

You can later add some STYLE to the HTML table.

Similarly, you can use an XML data instead of JSON to do the same. See this XML example...

Also learn, How to Read a CSV file in Asp.Net using StreamReader in C# and VB.Net.

Happy coding. 🙂

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