Home » , , , » LWC Custom File Upload Component Along With New Record Creation

LWC Custom File Upload Component Along With New Record Creation

Written By Venu Gutta Salesforce LWC on Sunday, 28 June 2020 | 06:11

How To Create New Record along with File Upload in Lightning Web Component(LWC)  : 
In this post we are going to see how to upload files/attachments into Salesforce object by using Lightning Web Component. If we use "lightning-file-upload" tag we cant insert file along with record (yet to be inserted into database). Because lightning-file-upload requires record id for enabling upload option, but at that time record id not available as record not inserted yet. So we are using lightning-input type="file" tag for uploading file. But if we use this we need to write our own logic to insert file using apex unlike "lightning-file-upload". By using this we can upload JPEG, PNG images, Pdf etc. Check below example code.

Example: Create New Contact Record form along with File upload option:

Step 1: Create a apex controller for handling contact record and file insertion.


public with sharing class ContactController {
    public static string saveContact(Contact contactRec, string file, string fileName) {
        string contactId;
            Insert contactRec;
            contactId = contactRec.Id;
            base62File = EncodingUtil.urlDecode(base62File, 'UTF-8');      
            ContentVersion contentVersionRec = new ContentVersion();
            contentVersionRec.Title = fileName;
            contentVersionRec.PathOnClient = '/' + fileName;
            contentVersionRec.FirstPublishLocationId = contactRec.Id;
            contentVersionRec.VersionData = EncodingUtil.base64Decode(base62File);
            contentVersionRec.IsMajorVersion = true;
            Insert contentVersionRec;
        } catch(Exception ex){
        return contactId;

Step 2: Create Lightning Web Component 


import { LightningElement, track } from 'lwc';
import saveRecord from '@salesforce/apex/ContactController.saveContact';
import { NavigationMixin } from 'lightning/navigation';
import { ShowToastEvent } from 'lightning/platformShowToastEvent';
const MAX_FILE_SIZE = 100000000; //10mb
export default class NewRecordWithFileUpload extends NavigationMixin(LightningElement) {
    @track name;
    @track phone;
    @track email;
    @track description;
    uploadedFiles = []; file; fileContents; fileReader; content; fileName

    onNameChange(event) {
        this.name = event.detail.value;
    onPhoneChange(event) {
        this.phone = event.detail.value;
    onEmailChange(event) {
        this.email = event.detail.value;
    onDescriptionChange(event) {
        this.description = event.detail.value;
    onFileUpload(event) {
        if (event.target.files.length > 0) {
            this.uploadedFiles = event.target.files;
            this.fileName = event.target.files[0].name;
            this.file = this.uploadedFiles[0];
            if (this.file.size > this.MAX_FILE_SIZE) {
                alert("File Size Can not exceed" + MAX_FILE_SIZE);

    saveContact() {
        this.fileReader = new FileReader();
        this.fileReader.onloadend = (() => {
            this.fileContents = this.fileReader.result;
            let base64 = 'base64,';
            this.content = this.fileContents.indexOf(base64) + base64.length;
            this.fileContents = this.fileContents.substring(this.content);

    saveRecord() {
        var con = {
            'sobjectType': 'Contact',
            'LastName': this.name,
            'Email': this.email,
            'Phone': this.phone,
            'Description': this.description
            contactRec: con,
            file: encodeURIComponent(this.fileContents),
            fileName: this.fileName
            .then(conId => {
                if (conId) {
                        new ShowToastEvent({
                            title: 'Success',
                            variant: 'success',
                            message: 'Contact Successfully created',
                        type: 'standard__recordPage',
                        attributes: {
                            recordId: conId,
                            objectApiName: 'Contact',
                            actionName: 'view'
            }).catch(error => {
                console.log('error ', error);


    <div class="slds-box slds-theme_default">
        <div class="slds-m-around_medium">
            <lightning-input type="text" label="Name" onchange={onNameChange}></lightning-input>
            <lightning-input type="tel" label="Phone" onchange={onPhoneChange}></lightning-input>
            <lightning-input type="email" label="Email" onchange={onEmailChange}></lightning-input>
            <lightning-textarea name="input3" label="Description" onchange={onDescriptionChange}
                placeholder="type here..."></lightning-textarea>
            <lightning-input type="file" onchange={onFileUpload} required name="uploadFile" label="Upload File">
            <lightning-button label="Save" onclick={saveContact}>


Step 3 : Add it Lightning App Page

Add this newRecordWithFileUpload LWC component to any lightning page.


Ps: on above example we did not add validations, make sure that add your own validations.


Post a comment