How to display account related contacts based on AccountId using the CustomEvent & dispatchEven in Salesforce lightning web component

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Hey guys, today in this post we are going to learn about How to display account related contacts based on AccountId using the CustomEvent & dispatchEven in salesforce lightning web component – LWC.

Files we used in this post example:-

displayContactsOnAccountId.html	Lightning Web Component HTML	It is child HTML file and calling on parentCmpLwc.html.
displayContactsOnAccountId.js	Lightning Web Component JavaScript	It is holding @wire property with handleChangeRadio functionality with CustomEvent and dispatchEvent events.
displayContactsOnAccountId.js-meta.xml	XML Meta File	It is used for where this lightning web component you want to exposed.
parentCmpLwc.html	Lightning Web Component HTML	It is Parent HTML file, that is used for write HTML element for user interface..
parentCmpLwc.js	Lightning Web Component JavaScript	It is holding child component’s event value..
parentCmpLwc.js-meta.xml	XML Meta File	It is used for where this lightning web component you want to exposed.
eventAppLwc.app	Lightning Application File	It is used for call the parent component to preview on browser..
lwcAppExampleApex.cls	Apex Controller	It is used for call apex @wire method to retrieve the data from server in LWC Javascript file..

Live Demo

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Start LWC Child Component

Step 1:- Create Lightning Web Component : displayContactsOnAccountId.html

SFDX:Lightning Web Component >> New >> displayContactsOnAccountId.html

displayContactsOnAccountId.html [Lightning Web Component HTML]

   <template>
   <lightning-card title="Display the Contacts based on AccountId the help of event in LWC" custom-icon="custom:icon13">
      <table class="slds-table slds-table_cell-buffer slds-table_bordered" border="1" cellspacing="0" cellpadding="0" bordercolor="#ccc" style="border-collapse:collapse;">
           <thead>
               <tr>
                   <th>Select</th>
                   <th>Name</th>
                   <th>Phone</th>
                   <th>Industry</th>
                   <th>Description</th>                   
               </tr>
           </thead>
            <template for:each={accData.data} for:item="accItem">
                <tr key={accItem.Id}>
                    <td><lightning-input type="radio" name="radioButtonSelect" value={accItem.Id} onchange={handleChangeRadio}></lightning-input></td>
                    <td>{accItem.Name}</td>
                    <td>{accItem.Phone}</td>
                    <td>{accItem.Industry}</td>
                    <td>{accItem.Description}</td>                    
                </tr>
            </template>
      </table>

   </lightning-card> 
</template>

<lightning-card title="Display the Contacts based on AccountId the help of event in LWC" custom-icon="custom:icon13">

<thead>

<tr>

<th>Select</th>

<th>Phone</th>

<th>Industry</th>

<th>Description</th>

</tr>

</thead>

<td>{accItem.Name}</td>

<td>{accItem.Phone}</td>

<td>{accItem.Industry}</td>

<td>{accItem.Description}</td>

</tr>

</template>

</table>

</lightning-card>

</template>

Step 2:- Create Lightning Web Component : displayContactsOnAccountId.js

SFDX:Lightning Web Component >> New >> displayContactsOnAccountId.js

displayContactsOnAccountId.js [LWC JavaScript File]

  import { LightningElement, track, wire } from 'lwc';
import retrieveAccountRecords from '@salesforce/apex/lwcAppExampleApex.retrieveAccountRecords';

export default class DisplayContactsOnAccountId extends LightningElement {
    @wire (retrieveAccountRecords) accData;
    @track getAccId;
     
    handleChangeRadio(event){        
        this.getAccId = event.target.value;
        window.console.log('getAccId ' + this.getAccId);
       const myCustomEventItem = new CustomEvent('myeventdemo',{
            detail: this.getAccId
       });
       this.dispatchEvent(myCustomEventItem);
        
    }
}

import { LightningElement, track, wire } from 'lwc';

import retrieveAccountRecords from '@salesforce/apex/lwcAppExampleApex.retrieveAccountRecords';

export default class DisplayContactsOnAccountId extends LightningElement {

@wire (retrieveAccountRecords) accData;

@track getAccId;

handleChangeRadio(event){

this.getAccId = event.target.value;

window.console.log('getAccId ' + this.getAccId);

const myCustomEventItem = new CustomEvent('myeventdemo',{

detail: this.getAccId

});

this.dispatchEvent(myCustomEventItem);

}

Step 3:- Create Lightning Web Component : displayContactsOnAccountId.js-meta.xml

SFDX:Lightning Web Component >> New >> displayContactsOnAccountId.js-meta.xml

displayContactsOnAccountId.js-meta.xml [LWC Meta Data XML]

  <?xml version="1.0" encoding="UTF-8"?>
<LightningComponentBundle xmlns="http://soap.sforce.com/2006/04/metadata">
    <apiVersion>45.0</apiVersion>
    <isExposed>true</isExposed>
    <targets>
        <target>lightning__AppPage</target>
        <target>lightning__RecordPage</target>
        <target>lightning__HomePage</target>
      </targets>
</LightningComponentBundle>

<?xml version="1.0" encoding="UTF-8"?>

<target>lightning__AppPage</target>

<target>lightning__RecordPage</target>

<target>lightning__HomePage</target>

</targets>

</LightningComponentBundle>

Start LWC Parent Component

Step 4:- Create Lightning Web Component : parentCmpLwc.html

SFDX:Lightning Web Component >> New >> parentCmpLwc.html

parentCmpLwc.html [Lightning Web Component HTML]

  <template>
    <lightning-card>
        
        <h3 slot="title">
            <lightning-icon icon-name="utility:connected_apps" size="small"></lightning-icon> Parent Component         
        </h3>

        <div class="slds-m-bottom--medium">
            <c-display-contacts-on-account-id onmyeventdemo={handleChangeAction}></c-display-contacts-on-account-id>
        </div>

        <br/><br/>

            <lightning-icon icon-name="utility:connected_apps" size="small"></lightning-icon> <b>Child Component</b>         
        
         
        <table class="slds-table slds-table_cell-buffer slds-table_bordered" border="1" cellspacing="0" cellpadding="0" bordercolor="#ccc" style="border-collapse:collapse;">
           <thead>
               <tr>
                   <th>First Name</th>
                   <th>Last Name</th>
                   <th>Email</th>
                   <th>Phone</th>
               </tr>
           </thead> 
            <template for:each={records} for:item='conItem'>
                <tr key={conItem.Id}>
                    <td>{conItem.FirstName}</td>
                    <td>{conItem.LastName}</td>
                    <td>{conItem.Email}</td>
                    <td>{conItem.Phone}</td>
                </tr>
            </template>
        </table>

        
    </lightning-card>
   
</template>

<lightning-card>

<lightning-icon icon-name="utility:connected_apps" size="small"></lightning-icon> Parent Component

</h3>

<c-display-contacts-on-account-id onmyeventdemo={handleChangeAction}></c-display-contacts-on-account-id>

</div>

<lightning-icon icon-name="utility:connected_apps" size="small"></lightning-icon> <b>Child Component</b>

<thead>

<tr>

<th>First Name</th>

<th>Email</th>

<th>Phone</th>

</tr>

</thead>

<td>{conItem.FirstName}</td>

<td>{conItem.LastName}</td>

<td>{conItem.Email}</td>

<td>{conItem.Phone}</td>

</tr>

</template>

</table>

</lightning-card>

</template>

Step 5:- Create Lightning Web Component : parentCmpLwc.js

SFDX:Lightning Web Component >> New >> parentCmpLwc.js

parentCmpLwc.js [LWC JavaScript File]

  import { LightningElement, track, wire } from 'lwc';
import retrieveContactRecords from '@salesforce/apex/lwcAppExampleApex.retrieveContactRecords';

export default class ParentCmpLwc extends LightningElement {
      
    @track accountId;
    @track records;
    @track errorMsg;    

    @wire (retrieveContactRecords, {accId:'$accountId'})
      wireConRecord({error,data}){
        if(data){
          this.records = data;     
          this.errorMsg = undefined;    
        }else{         
          this.errorMsg = error;
          this.records = undefined;
        }
      }

    handleChangeAction(event){
      this.accountId = event.detail;
      window.console.log('accountId ' + this.accountId);
    }


}

import { LightningElement, track, wire } from 'lwc';

import retrieveContactRecords from '@salesforce/apex/lwcAppExampleApex.retrieveContactRecords';

export default class ParentCmpLwc extends LightningElement {

@track accountId;

@track records;

@track errorMsg;

@wire (retrieveContactRecords, {accId:'$accountId'})

wireConRecord({error,data}){

if(data){

this.records = data;

this.errorMsg = undefined;

}else{

this.errorMsg = error;

this.records = undefined;

}

handleChangeAction(event){

this.accountId = event.detail;

window.console.log('accountId ' + this.accountId);

}

Step 6:- Create Lightning Web Component : parentCmpLwc.js-meta.xml

SFDX:Lightning Web Component >> New >> parentCmpLwc.js-meta.xml

parentCmpLwc.js-meta.xml [LWC Meta Data XML]

  <?xml version="1.0" encoding="UTF-8"?>
<LightningComponentBundle xmlns="http://soap.sforce.com/2006/04/metadata">
    <apiVersion>45.0</apiVersion>
    <isExposed>true</isExposed>
    <targets>
        <target>lightning__AppPage</target>
        <target>lightning__RecordPage</target>
        <target>lightning__HomePage</target>
      </targets>
</LightningComponentBundle>

<?xml version="1.0" encoding="UTF-8"?>

<target>lightning__AppPage</target>

<target>lightning__RecordPage</target>

<target>lightning__HomePage</target>

</targets>

</LightningComponentBundle>

Start Apex Controller

Step 7:- Create Apex Controller : lwcAppExampleApex.cls

SFDX:Create Apex Class >> New >> lwcAppExampleApex.cls

lwcAppExampleApex.cls [Apex Class]

  public with sharing class lwcAppExampleApex {
   

    //Display the Contacts based on AccountId the help of event in LWc
    @AuraEnabled(cacheable=true)
    public static List<Account> retrieveAccountRecords(){
        List<Account> accList = [Select Id, Name, Phone, Industry, Description From Account Where Phone != null limit 6];
        return accList;
    }


    @AuraEnabled(cacheable=true)
    public static List<Contact> retrieveContactRecords(string accId){
      List<Contact> conObj = new  List<Contact>();
      List<Contact> conList = [Select Id, FirstName, LastName, Email, Phone, AccountId From Contact Where AccountId=:accId];
      for(Contact con:conList){
        conObj.add(con);
      }
      return conObj;
    }
}

public with sharing class lwcAppExampleApex {

//Display the Contacts based on AccountId the help of event in LWc

@AuraEnabled(cacheable=true)

public static List<Account> retrieveAccountRecords(){

List<Account> accList = [Select Id, Name, Phone, Industry, Description From Account Where Phone != null limit 6];

return accList;

}

@AuraEnabled(cacheable=true)

public static List<Contact> retrieveContactRecords(string accId){

List<Contact> conObj = new List<Contact>();

List<Contact> conList = [Select Id, FirstName, LastName, Email, Phone, AccountId From Contact Where AccountId=:accId];

for(Contact con:conList){

conObj.add(con);

}

return conObj;

}

Start Lightning Application

Step 8:- Create Lightning Application : eventAppLwc.app

From Developer Console >> File >> New >> Lightning Application

eventAppLwc.app [Component Application File]

  <aura:application extends="force:slds">
   <c:parentCmpLwc/>
</aura:application>

<aura:application extends="force:slds">

<c:parentCmpLwc/>

</aura:application>

Further post that would you like to learn in LWC

4 thoughts on “How to display account related contacts based on AccountId using the CustomEvent & dispatchEven in Salesforce lightning web component – LWC”

Pintu Rajak

December 16, 2020 at 8:28 pm

great idea
Ankita kumari

December 19, 2020 at 8:29 am

Great article. Thanks for sharing great information.
health tips in urdu

December 19, 2020 at 8:18 pm

Thanks for sharing.I found a lot of interesting information here. A really good post, very thankful and hopeful that you will write many more posts like this one.
shimul

January 1, 2021 at 2:27 pm

this is a very helpful post. Thanks for sharing with us.

Files we used in this post example:-

Start LWC Child Component

displayContactsOnAccountId.html [Lightning Web Component HTML]

displayContactsOnAccountId.js [LWC JavaScript File]

displayContactsOnAccountId.js-meta.xml [LWC Meta Data XML]

Start LWC Parent Component

parentCmpLwc.html [Lightning Web Component HTML]

parentCmpLwc.js [LWC JavaScript File]

parentCmpLwc.js-meta.xml [LWC Meta Data XML]

Start Apex Controller

lwcAppExampleApex.cls [Apex Class]

Start Lightning Application

eventAppLwc.app [Component Application File]

Related Topics

4 thoughts on “How to display account related contacts based on AccountId using the CustomEvent & dispatchEven in Salesforce lightning web component – LWC”

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