xDB Xconnect.Contact returning null value

Question

I am working with xDB code upgrade from Sitecore 8.2 to 9.3 xconnect. I'm using the below code in 8.2 to get current contact and it returning contact value.

Public Contact Getcurrentcontact()
{ 
 return Tacker.Current.Session.Contact 
}

To do the same in Sitecore 9.3 I am using the below code to get contact by contact id but it always returns the null value.

public Contact GetCurrentContact()
{
    if (Tracker.IsActive && Tracker.Current != null && Tracker.Current.Session != null)
    {
        Contact contact = null;
        Guid identifier = Tracker.Current.Contact.ContactId;
        ContactReference reference = new ContactReference(identifier);
        using (XConnectClient client = SitecoreXConnectClientConfiguration.GetClient())
        {
            contact = client.Get<Contact>(reference,
                new ContactExpandOptions(PersonalInformation.DefaultFacetKey,
                    EmailAddressList.DefaultFacetKey));
        }

        return contact;
    }

    return null;
}

Can someone please help.

Answer 1

Here is the code which should work for you:

private Contact GetExistingXConnectContact()
{
    if (!Sitecore.Analytics.Tracker.Current.Contact.IsNew)
    {
        var anyIdentifier = Sitecore.Analytics.Tracker.Current.Contact.Identifiers.FirstOrDefault();

        if (anyIdentifier != null)
        {
            using (XConnectClient client = Sitecore.XConnect.Client.Configuration
                .SitecoreXConnectClientConfiguration.GetClient())
            {
                try
                {
                    return client.Get(
                        new IdentifiedContactReference(anyIdentifier.Source, anyIdentifier.Identifier),
                        new ContactExpandOptions(PersonalInformation.DefaultFacetKey));
                }
                catch (Exception exc)
                {
                    // handle exc
                }
            }
        }
    }

    return null;
}

You can find more in Sitecore documentation, e.g. https://doc.sitecore.com/developers/90/sitecore-experience-platform/en/set-contact-facets-in-session.html

Answer 2

Reference of the Contact should be the same, it should not be like one variable created from Sitecore.Analytics.tracking.contact and another is from Sitecore.Xconnect.Contact

From the above inline comments, I can say your code line Contact contact=null; is taking reference from a different DLL. Could you please change the assignment with

Sitecore.XConnect.Contact contact = null;

In my opinion, it's taking reference from the Sitecore.Analytics.tracking.contact, you can hover on variable and check the reference details.