Upload Files in Lightning Component | how to upload file dynamically using the wrapper class in Salesforce

Hey guys, In this post we are going to learn about how to upload files in Salesforce lightning component.

In this example we will attached the files from Custom sObject by help of wrapper apex class in lightning component.

Don’t forget to check out:- How to display upload Image if a record existing an attachment in lightning component Click Here For More Information

Files we used in this post example:-

File Name	File Type	Description
uploadAttachmentCmp.cmp	Lightning Component	It is used to user interface display upload button and toast success message on browser.
uploadAttachmentCmpConroller.js	JavaScript Controller File	It is used for client side javascript function that is communicate to apex class method.
uploadFileController.apxc	Apex Class Controller	Upload the file into database server
Custom Object:- childObjTrigger__c	Custom Object	Upload the attachment files on custom sObject Files & Attechment section.

Final Output

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Note:- Custom sObject >> childObjTrigger__c

You need to change custom sObject name with your custom sObject name.

Step 1:- Create Lightning Component : uploadAttachmentCmp.cmp

From Developer Console >> File >> New >> Lightning Component

uploadAttachmentCmp.cmp [Lightning Component File]

   <aura:component controller="uploadFileController" implements="force:appHostable,flexipage:availableForAllPageTypes,flexipage:availableForRecordHome,force:hasRecordId,forceCommunity:availableForAllPageTypes,force:lightningQuickAction" access="global" >

	<aura:attribute name="wrapListItems" type="childObjTrigger__c[]"/>

       <aura:handler name="init" value="{!this}" action="{!c.doInit}"/>

```
 
```

       <aura:attribute name="accept" type="List" default="['.jpg', '.jpeg','.pdf']"/>

       <aura:attribute name="multiple" type="Boolean" default="true"/>

       <aura:attribute name="disabled" type="Boolean" default="false"/>

```
 
```
```
    <div class="slds">        
```
```
 
```

        <table class="slds-table slds-table--bordered slds-table--col-bordered" style="border-collapse:collapse;">

```
            <thead> 
```

                <tr>

                    <th>Attachment</th>

```
                </tr>
```
```
            </thead>
```
```
            <tbody>
```

                <aura:iteration items="{!v.wrapListItems}" var="childObjVar" indexVar="index">

                    <tr id="{!childObjVar.recordId}">

```
                        <td>
```

                            <lightning:fileUpload

                              multiple="{!v.multiple}"

                              accept="{!v.accept}"

                              recordId="{!childObjVar.recordId}"

                              onuploadfinished="{!c.uploadFileAction}" disabled="{!v.disabled}"/>

```
                        </td>
```
```
                    </tr>
```
```
                </aura:iteration>
```
```
            </tbody>
```
```
        </table>        
```
```
 
```
```
        <br/><br/>
```
```
   
```

<div style="border:1px #ddd solid; padding:10px; background:#eee; margin:40px 0;">

```
 
```

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```
 
```
```
            <br/><br/>
```

            <p data-aura-rendered-by="435:0"><img src="https://www.w3web.net/wp-content/uploads/2021/07/tickMarkIcon.png" width="25" height="25" style="vertical-align:top; margin-right:10px;" data-aura-rendered-by="436:0"><strong data-aura-rendered-by="437:0"><span style="font-size:17px; font-style:italic; display:inline-block; margin-right:5px; color:rgb(255 128 0);">You May Also Like →</span> </strong></p>

            <div style="display:block; overflow:hidden;">

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```
                    </ul>
```
```
            </div>
```
```
 
```

            <div style="width: 50%; float:left; display:inline-block">

                    <ul style="list-style-type: square; font-size: 16px; margin: 0 0 0 54px; padding: 0;">

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```
                    </ul>
```
```
                </div>
```

               <div style="clear:both;"></div>

```
               <br/>
```

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```
                </div>
```
```
    </div>
```
```
 
```
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</div>
```
```
 
```
```
  
```
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```
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    </div>
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```
```
   </aura:component>
```

Step 2:- Create Lightning Component : uploadAttachmentCmpController.js

From Developer Console >> File >> New >> Lightning Component >> JavaScript Controller

uploadAttachmentCmpController.js [JavaScript Controller]

```
   ({
```

    doInit : function(component, event, helper) {

        var action = component.get("c.childObjWrapMethod");

```
 
```

        action.setCallback(this, function(response){

            var state = response.getState();

```
 
```
```
            if(state=='SUCCESS'){
```

                var result = response.getReturnValue();

                component.set('v.wrapListItems',result);

```
            }
```
```
        });
```
```
        $A.enqueueAction(action);
```
```
    },
```
```
 
```

    uploadFileAction : function(component, event, helper) {

        var uploadedFiles = event.getParam("files");

        var documentId = uploadedFiles[0].documentId;

        var fileName = uploadedFiles[0].name;

        var toastEvent = $A.get("e.force:showToast");

```
        toastEvent.setParams({
```
```
            "title": "Success!",   
```
```
            "type": "success",
```

            "message": "File "+fileName+" Uploaded successfully."

```
        });
```
```
        toastEvent.fire();
```

        $A.get('e.force:refreshView').fire();

```
       },
```
```
   })
```

Step 3:- Create Lightning Application : uploadFileController.apxc

From Developer Console >> File >> New >> Apex Class

uploadFileController.apxc [Apex Class Controller]

   public class cloneFilesFromOldCaseToNew {

```
 
```

    public class wrapperChildObjClass{

```
        @AuraEnabled
```
```
        public Id recordId;        
```
```
 
```

        public wrapperChildObjClass(Id recordId){

            this.recordId = recordId;

```
        }
```
```
    }
```
```
 
```
```
 
```
```
    @AuraEnabled
```

    public static List<wrapperChildObjClass> childObjWrapMethod(){

      List<wrapperChildObjClass> wrapObj = NEW List<wrapperChildObjClass>();

       List<childObjTrigger__c> childObjList = [SELECT Id, Name FROM childObjTrigger__c LIMIT 1];

        FOR(childObjTrigger__c childObjWrp: childObjList){

            wrapObj.add(NEW wrapperChildObjClass(childObjWrp.Id));

```
        }     
```
```
        RETURN wrapObj;
```
```
     }    
```
```
   }
```

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FAQ (Frequently Asked Questions)

How do I upload files to Salesforce?

Enable the preference to upload files as Salesforce Files in Salesforce Classic in Setup. Type Salesforce Files in the Quick Find box, select General Settings, and then click Files uploaded to the Attachments related list on records are uploaded as Salesforce Files, not as attachments.

How do you display an image from static resources in the lightning component?

We can use $Resource. resourceName within an expression. resourceName is the Name of the static resource.

What is ParentId in Attachment Salesforce?

A ParentId is the 18-character Salesforcer Id of the record that the attachment belongs to. To get started creating and updating attachments, first, load the {salesforcer} and {dplyr} packages and login, if needed.

Vijay Kumar

Hi, This is Vijay Kumar behind the admin and founder of w3web.net. I am a senior software developer and working in MNC company from more than 8 years. I am great fan of technology, configuration, customization & development. Apart of this, I love to write about Blogging in spare time, Working on Mobile & Web application development, Salesforce lightning, Salesforce LWC and Salesforce Integration development in full time. [Read full bio] | | The Sitemap where you can find all published post on w3web.net