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How to read csv file in angular 16+?

by therichpost
Published: Last Updated on 14 comments

Hello friends, welcome back to my blog. Today in this blog post, I am going to tell you, How to read csv file in angular 16+?

Guy’s we can use same code in Angular 12 to read csv file.

Angular 10 read csv file data

Angular 16 came and if you are new then you must check below two links:

  1. Angular16 Basic Tutorials
  2. Angular Free Templates

Friends now I proceed onwards and here is the working code snippet for How to read csv file in angular 16+? and please use this carefully to avoid the mistakes:

1. Firstly friends we need fresh angular 16 setup and for this we need to run below commands but if you already have angular 16 setup then you can avoid below commands. Secondly we should also have latest node version installed on our system:

npm install -g @angular/cli 

ng new angularcsv //Create new Angular Project

cd angularcsv // Go inside the Angular Project Folder

ng serve --open // Run and Open the Angular Project

http://localhost:4200/ // Working Angular Project Url

2. Now friends, here we need to run below commands into our project terminal to install bootstrap modules(for good looks) into our angular application:

npm install --save bootstrap

ng serve --o

3. Now friends, here we need to add below  into our angular.json file:

"styles": [

4. Now friends, we need to add below code into our src/app/app.component.ts file:


export class AppComponent {
 //array varibales to store csv data
   lines:any = []; //for headings
   linesR:any = []; // for rows
   //File upload function
   changeListener(files:any) {
    let fileList = (<HTMLInputElement>files.target).files;
    if (fileList && fileList.length > 0) {
      let file: File = fileList[0];

      let reader: FileReader = new FileReader();
      reader.onload = e => {
        let csv: any = reader.result;
        let allTextLines = [];
        allTextLines = csv.split(/\r|\n|\r/);

        let headers = allTextLines[0].split(",");
        let data = headers;
        let tarr = [];
        for (let j = 0; j < headers.length; j++) {
        let tarrR = [];
        let arrl = allTextLines.length;
        let rows = [];
        for (let i = 1; i < arrl; i++) {
        for (let j = 0; j < arrl; j++) {

5. Now friends we just need to add below code into src/app/app.component.html file to show csv data into bootstrap data table:

<div class="container">
  <h1 class="mt-4">TheRichPost.com</h1>
  <input class="form-control mb-5" type="file" class="upload" (change)="changeListener($event)">

  <table class="table table-bordered table-dark mt-5">
        <th *ngFor="let item of lines[0]; let i = index">{{item}}</th>
      <tr *ngFor="let item of linesR[0]; let i = index">
        <td *ngFor="let itemm of lines[0]; let j = index">{{item[j]}}</td>

Now we are done friends. If you have any kind of query, suggestion and new requirement then feel free to comment below.

Guys, in my next post, I will tell you, how to save csv file data into database in angular?

Note: Friends, In this post, I just tell the basic setup and things, you can change the code according to your requirements. For better live working experience, please check the video on the top.

I will appreciate that if you will tell your views for this post. Nothing matters if your views will be good or bad because with your views, I will make my next posts more good and helpful.



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shivarama krihshna December 14, 2020 - 9:59 am

How can i display data into aonther page , not in the same page

Ajay Malhotra December 14, 2020 - 10:02 am

With the help of services.

shivarama krihshna December 14, 2020 - 11:04 am

Thank you so much bro, this code is used for me , now i am trying to display data ,after click on submit button data should display on another new screen/page.

Ajay Malhotra December 14, 2020 - 11:12 am


Sayuri February 1, 2021 - 5:07 am

Hi thank you so much for the tutorial. Here I am using angular 11 and I got this error,

Type ‘File | null’ is not assignable to type ‘File’.
Type ‘null’ is not assignable to type ‘File’.ts(2322)


let file: File = files.item(0);

this above code segment. I tried but still couldn’t solve it. Could you please help me to fix it?

Ajay Malhotra February 1, 2021 - 6:23 am

Okay, I will update you on this. Thanks

Sayuri February 1, 2021 - 7:13 am

Thank you and waiting for your reply..
For lines and linesR also I had to declare it like below for angular 11,

lines: any = [];
linesR: any = [];

I could solve those two errors in my code but still struggling with the file thing..

Sanket Majale May 6, 2021 - 5:44 am

Please Check Your Angular Version. Angular 11 version this Error Give “Use Angular 10”

Sanket Majale May 6, 2021 - 5:45 am

Can u tell me please How to save csv data into SQL Server with angular?

Ajay Malhotra May 6, 2021 - 5:47 am

Yes sure.

Nilanjan November 23, 2021 - 4:05 pm

error TS2339: Property ‘files’ does not exist on type ‘EventTarget’.


Can you fix it?

Ajay Malhotra November 23, 2021 - 4:19 pm

I will update you.

kevin September 4, 2022 - 4:46 am

hello I am doing in angular 13 and I get this error can you help me?

1.Type ‘File | null’ is not assignable to type ‘File’.
2.Argument of type ‘any[]’ is not assignable to parameter of type ‘never’.ts(2345)

1.app.component.ts(4, 32): Error occurs in the template of component AppComponent.

therichpost October 20, 2023 - 1:36 pm

I have updated the post.


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