Hi All,

I am trying to create a new contact. Once the record is saved in Salesforce, an email need to be sent along with the unique id.

I have created a formula field for the Unique ID and associated record ID to this field.

Now, when I try to send an email with Unique ID, it shows null value.

<apex:page controller="SubmitNewContactController" docType="html-5.0">
   
    <apex:form>
        <apex:slds/>
    <apex:pageMessages></apex:pageMessages>
        <div class="slds-scope slds-box">
         <apex:outputPanel >
            <div class="slds-text-align_center slds-text-heading_medium"><p>Submit New Contact </p></div>
             <div class="slds-form-element">
                    <label class="slds-form-element__label"><abbr class="slds-required"></abbr> FirstName</label>
                <div class=" slds-scope slds-form-element__control">
                    <apex:input value="{!FirstName}" styleClass="slds-input" id="FirstName" />
                </div>
                 <label class="slds-form-element__label"><abbr class="slds-required"></abbr> LastName</label>
                 <div class=" slds-scope slds-form-element__control">
                    <apex:input value="{!LastName}" styleClass="slds-input" id="LastName" />
                </div>
                 <label class="slds-form-element__label"><abbr class="slds-required"></abbr> Phone</label>
                 <div class=" slds-scope slds-form-element__control">
                    <apex:input value="{!Phone}" styleClass="slds-input" id="Phone" />
                </div>
                 <label class="slds-form-element__label"><abbr class="slds-required"></abbr> Email</label>
                 <div class=" slds-scope slds-form-element__control">
                    <apex:input value="{!Email}" styleClass="slds-input" id="Email" />
                </div>
                 <label class="slds-form-element__label"><abbr class="slds-required"></abbr> Zipcode</label>
                 <div class=" slds-scope slds-form-element__control">
                    <apex:input value="{!Zipcode}" styleClass="slds-input" id="Zipcode" />
                </div>
                 <div class=" slds-scope slds-form-element__control">
                    <apex:commandButton action="{!SubmitContact}" value="Submit"/> 
                </div>
            </div>
         </apex:outputPanel>   
        </div>
        
    
    </apex:form>
</apex:page>
public class SubmitNewContactController {
    public Contact c{get;set;}
    public String FirstName{get;set;}
    public String LastName{get;set;}
    public String phone{get;set;}
    public String Email{get;set;}
    public String Zipcode{get;set;}
    
    public SubmitNewContactController(){
        c = new Contact();
    }
    
    public PageReference SubmitContact(){
        c.FirstName = FirstName;
        c.LastName = LastName;
        c.phone = phone;
        c.Email = Email;
        c.MailingPostalCode = Zipcode;
        insert c;
        
        PageReference pr = new PageReference('/apex/ThankYouPage');
        Messaging.SingleEmailMessage semail = new Messaging.SingleEmailMessage();
        String[] sendingTo = new String[]{c.Email};
        semail.setToAddresses(sendingTo);
        semail.setSubject('Registration is completed');
        semail.setPlainTextBody('Hi'+ c.name+'Thank you for registering.This is your UniqueID'+ c.Unique_ID__c);
        Messaging.sendEmail(new Messaging.SingleEmailMessage[] {semail});
        pr.setRedirect(true);
        return pr;
        
        
        
    }
    

}

I am able to send the email but cannot capture the name and uniqueId in the email. It shows null in the email.
Can anyone please help me to fix the code?

Thanks,
Sirisha