Entity Framework: Setting update timestamp

Question

All of our database tables have UpdateUserID and UpdateTS. I\'d like to have this set if my entity has changes. Is there a way I can have this update on the spot condition

Answer 1

I couldn't get the solution proposed by @eric-j to work, it only set the dates when creating a new object but not when updating.

I found this solution and modified it to look similar. Have tried out it, and it works like a charm.

public override int SaveChanges()
{
    var now = DateTime.UtcNow;

    var entries = ChangeTracker
        .Entries()
        .Where(e => e.State == EntityState.Added || e.State == EntityState.Modified);

    foreach (var entry in entries)
    {
        if (entry.Entity is IHasLastModified lastModified)
        {
            lastModified.LastModified = now;
            if (entry.State == EntityState.Added)
            {
                lastModified.CreatedDate = now;
            }
        }
    }

    return base.SaveChanges();
}