Concatenate multiple columns into one single column in SQL Server Query

SQL DEMO :

CREATE Table XYZ(ID int,city nvarchar(50),SCenter nvarchar(100))

INSERT INTO (ID,City,SCenter) 
Values(1,'New Delhi','Rajouri Garden'),
(2,'New Delhi','Palika'),
(3,'New Delhi','Pacific Mall'),
(4,'New Delhi','Select City'),
(5,'Mumbai','Oberoi Mall'),
(6,'Mumbai','Phoenix Mall'),
(7,'Noida','GIP'),
(8,'New Delhi',NULL),
(9,'New Mumbai',NULL),
(10,'Lucknow','Fun Republic'),
(11,'Lucknow',NULL),
(12,'Mumbai',NULL)

Select *,
CASE WHEN Scenter is not null THEN Scenter+' '+City+' '+'District'+' '+'India' end as [Address]
 from XYZ 
 Where SCenter is not null

Output:

Now you can fetch the Address in your label..