ASP.net Core Awesome Controls overview

<h2>Grid bound to parent controls for filtering</h2>
<div class="bar">
    @Html.Awe().TextBox(new TextBoxOpt { Name = "txtPerson", Placeholder = "search for person ...", CssClass = "searchtxt", ClearBtn = true })
    @Html.Awe().TextBox(new TextBoxOpt { Name = "txtFood", Placeholder = "search for food ...", CssClass = "searchtxt", ClearBtn = true })
    @(Html.Awe().DropdownList(new DropdownListOpt
{
    Name = "selCountry",
    Url = Url.Action("GetCountries", "Data"),
    ClearBtn = true
}))
</div>

@(Html.Awe().Grid("Grid1")
    .Mod(o => o.Main())
    .Columns(
    new Column { Bind = "Id", Width = 75, Groupable = false, Resizable = false },
    new Column { Bind = "Person" },
    new Column { Bind = "Food.Name", ClientFormatFunc = "site.imgFood", MinWidth = 200 },
    new Column { Bind = "Country.Name", Header = "Country" },
    new Column { Bind = "Date", Grow = .1 }.Mod(o => o.Autohide()),
    new Column { Bind = "Location" }.Mod(o => o.Autohide()),
    new Column { Bind = "Chef.FirstName,Chef.LastName", Prop = "ChefName", Header = "Chef" })
    .Url(Url.Action("GetItems", "LunchGrid"))
    .Height(330)
    .Reorderable()
    .Resizable()
    .Persistence(Persistence.Session)
    .Parent("txtPerson", "person")
    .Parent("txtFood", "food")
    .Parent("selCountry", "country"))

public IActionResult GetItems(GridParams g, int? country, string person, string food)
{            
    var query = Db.Lunches.AsQueryable();                        
    
    if (person != null) query = query.Where(o => o.Person.ToLower().Contains(person.ToLower()));
    if (food != null) query = query.Where(o => o.Food.Name.ToLower().Contains(food.ToLower()));
    if (country.HasValue) query = query.Where(o => o.Country.Id == country);
                
    var gmb = new GridModelBuilder<Lunch>(query.AsQueryable(), g);
                
    gmb.KeyProp = o => o.Id;

    // grid row model
    // columns bound to Food.Name by default will display rowModel.FoodName
    // or specify in the view Column.Prop ="FooName", or ClientFormat = ".(FoodName)"
    gmb.Map = o => new
    {
        o.Id,
        o.Person,
        FoodName = o.Food.Name,
        FoodPic = o.Food.Pic,
        o.Location,
        o.Price,
        Date = o.Date.ToShortDateString(),
        CountryName = o.Country.Name,
        ChefName = o.Chef.FullName
    };

    return Json(gmb.Build());
}