• LWC Custom File Upload Component Along With New Record Creation

    Published By: Venu Gutta
    Published on: Sunday, 28 June 2020
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    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.

    ContactController


     public with sharing class ContactController {  
       @AuraEnabled  
       public static string saveContact(Contact contactRec, string file, string fileName) {  
         string contactId;  
         try{  
           Insert contactRec;  
           contactId = contactRec.Id;  
           String base64File = EncodingUtil.urlDecode(file, 'UTF-8');     
           ContentVersion contentVersionRec = new ContentVersion();  
           contentVersionRec.Title = fileName;  
           contentVersionRec.PathOnClient = '/' + fileName;  
           contentVersionRec.FirstPublishLocationId = contactRec.Id;  
           contentVersionRec.VersionData = EncodingUtil.base64Decode(base64File);  
           contentVersionRec.IsMajorVersion = true;  
           Insert contentVersionRec;  
         } catch(Exception ex){  
           system.debug('Exception===>'+ex.getMessage());  
         }  
         return contactId;  
       }    
     }  
    

    Step 2: Create Lightning Web Component 

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

    newRecordWithFileUpload.html
     <template>  
       <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-input>  
         </div>  
         <div class="slds-align_absolute-center">    
           <lightning-button label="Save" onclick={saveContact}>  
           </lightning-button>  
         </div>  
       </div>  
     </template>  
    

    Step 3 : Add this File Upload Lightning Web Component to Lightning App Page

    Add this newRecordWithFileUpload LWC component to any lightning page.

    Output:



    Ps: on above example we did not add validations, make sure that add your own validations.
  • 2 comments to ''LWC Custom File Upload Component Along With New Record Creation"

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    1. how to achieve this through aura component?

      ReplyDelete
    2. Hi Venu, just wanted to say thank you for this article. Very useful and concise workaround

      ReplyDelete