How to display account related contacts based on AccountId using the CustomEvent & dispatchEven in Salesforce lightning web component - LWC | how to display account related contacts based on AccountId in lwc

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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..

Don’t forget to check out:- How to display account related contacts based on account name using search input and click button in Salesforce lightning web component – LWC Click Here For More Information

Live Demo

Other related post that would you like to learn in LWC

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>

<br/><br/>
    <p><img src="https://www.w3web.net/wp-content/uploads/2021/05/thumbsUpLike.png" width="25" height="25" style="vertical-align:top; margin-right:10px;"/> <strong> <span style="font-size:15px; font-style:italic; display:inline-block; margin-right:5px;">Don't forget to check out:-</span> <a href="https://www.w3web.net/" target="_blank" style="text-decoration:none;" rel="noopener noreferrer">An easy way to learn step-by-step online free tutorial, To know more Click  <span style="color:#ff8000; font-size:18px;">Here..</span></a></strong></p>

   </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>

<p><img src="https://www.w3web.net/wp-content/uploads/2021/05/thumbsUpLike.png" width="25" height="25" style="vertical-align:top; margin-right:10px;"/> <strong> <span style="font-size:15px; font-style:italic; display:inline-block; margin-right:5px;">Don't forget to check out:-</span> <a href="https://www.w3web.net/" target="_blank" style="text-decoration:none;" rel="noopener noreferrer">An easy way to learn step-by-step online free tutorial, To know more Click <span style="color:#ff8000; font-size:18px;">Here..</span></a></strong></p>

</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>

TechW3web:- To know more, Use this Link

Further post that would you like to learn in LWC

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Author of w3web.net

Hi, This is Vijay 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.

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

Pintu Rajak

December 16, 2020 at 8:28 pm

great idea
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December 19, 2020 at 8:29 am

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July 24, 2021 at 5:34 am

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Fiona Xu

August 5, 2021 at 6:38 am

Great work, thanks

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]

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Author of w3web.net

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

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