Serialize List Items as Separate JSON Object in C#, VB.NET

By: Suresh Dasari Feb 8, 2017

Introduction:

Here we will learn how to serialize list object as separate JSON array in c#, vb.net with example or Use newtonsoft.json to serialize list items as seaprate JSON object in c#, vb.net with example or Jsontextwriter to serialize list object as JSON array in c#, vb.net with example. By using newtonsoft Jsontextwriter reference in our applications we can easily convert list items as separate JSON object based on our requirements.

Description:

In previous articles I explained split the string include delimiter at the end in c#, vb.net, convert list object to json string in c#, vb.net, newtonsoft serialize and deserialize in c#, vb.net, jQuery ajax json example in asp.net, convert data table to json string with example, convert string xml to datatable in c#, vb.net, convert json string to json object with example and many more articles related to in JSON, asp.net, mvc, c#, vb.net. Now I will explain how to use newtonsoft jsontextwriter to serialize list items as separate JSON list in c#, vb.net with example.

Generally in our applications jsontextwriter is used to convert the list items to json in required format and it will help us to show list items as a separate json items based on our requirements.

Following is the simple code snippet to convert list items to json format using jsontextwriter.

C# Code

using System;

using System.Collections.Generic;

using System.Text;

using Newtonsoft.Json;

using System.IO;

namespace testtopics

{

class Program

{

static void Main(string[] args)

{

List<userdetails> items = new List<userdetails>();

userdetails user = new userdetails();

items.Add(new userdetails { userid = 1, username = "suresh", location = "chennai" });

items.Add(new userdetails { userid = 2, username = "rohini", location = "guntur" });

items.Add(new userdetails { userid = 3, username = "praveen", location = "bangalore" });

items.Add(new userdetails { userid = 4, username = "sateesh", location = "vizag" });

items.Add(new userdetails { userid = 5, username = "madhav", location = "nagpur" });

items.Add(new userdetails { userid = 6, username = "honey", location = "nagpur" });

StringBuilder sb = new StringBuilder();

StringWriter sw = new StringWriter(sb);

using(JsonTextWriter jw = new JsonTextWriter(sw))

{

// jw.Formatting = Formatting.Indented;

foreach(var item in items)

{

jw.WriteStartObject();

var userinfo = new userdetails

{

userid = item.userid,

username = item.username,

location = item.location

};

var proptypes = userinfo.GetType();

jw.WritePropertyName("userid");

jw.WriteValue(userinfo.userid.ToString());

jw.WritePropertyName("username");

jw.WriteValue(userinfo.username.ToString());

jw.WritePropertyName("location");

jw.WriteValue(userinfo.location.ToString());

jw.WriteEndObject();

jw.WriteRaw("\n");

}

Console.WriteLine(sb.ToString());

Console.ReadLine();

}

class userdetails

{

public int userid { get; set; }

public string username { get; set; }

public string location { get; set; }

}

VB.NET Code

Imports System.Collections.Generic

Imports System.Text

Imports Newtonsoft.Json

Imports System.IO

Module Module1

Sub Main()

Dim items As New List(Of userdetails)()

Dim user As New userdetails()