How to update only one field using Entity Framework?

Question

Here\'s the table

Users

UserId
UserName
Password
EmailAddress

and the code..

Answer 1

_context.Users.UpdateProperty(p => p.Id, request.UserId, new UpdateWrapper()
                {
                    Expression = p => p.FcmId,Value = request.FcmId
                });
   await _context.SaveChangesAsync(cancellationToken);

Update Property is an extension method

public static void UpdateProperty(this DbSet set, Expression> idExpression,
            T2 idValue,
            params UpdateWrapper[] updateValues)
            where T : class, new()
        {
            var entity = new T();
            var attach = set.Attach(entity);
            attach.Property(idExpression).IsModified = false;
            attach.Property(idExpression).OriginalValue = idValue;
            foreach (var update in updateValues)
            {
                attach.Property(update.Expression).IsModified = true;
                attach.Property(update.Expression).CurrentValue = update.Value;
            }
        }

And Update Wrapper is a class

public class UpdateWrapper
    {
        public Expression> Expression  { get; set; }
        public object Value { get; set; }
    }