How to update only one field using Entity Framework?

Question

Here\'s the table

Users

UserId
UserName
Password
EmailAddress

and the code..

Answer 1

Combining several suggestions I propose the following:

    async Task UpdateDbEntryAsync(T entity, params Expression>[] properties) where T : class
    {
        try
        {
            var entry = db.Entry(entity);
            db.Set().Attach(entity);
            foreach (var property in properties)
                entry.Property(property).IsModified = true;
            await db.SaveChangesAsync();
            return true;
        }
        catch (Exception ex)
        {
            System.Diagnostics.Debug.WriteLine("UpdateDbEntryAsync exception: " + ex.Message);
            return false;
        } 
    }

called by

UpdateDbEntryAsync(dbc, d => d.Property1);//, d => d.Property2, d => d.Property3, etc. etc.);

Or by

await UpdateDbEntryAsync(dbc, d => d.Property1);

Or by

bool b = UpdateDbEntryAsync(dbc, d => d.Property1).Result;