MultiLookup

Declaration:

<% Meal1.MultiLookup().Controller("MealsMultiLookup"); %>
<awe:Ocon runat="server" ID="Meal1" />

Data binding

It needs a controller to get data from, the controller must have 3 actions:

GetItems

- display the selected values

Search

- popup search

Selected

- popup selected items Instead of specifying a controller 3 urls can be specified using extensions

.GetItemsUrl(str)

,

.SearchUrl(str)

,

.SelectedUrl(str)

. Both the

Search

and

Selected

actions will get the

selected

parameter which in case of

Search

action will be used to exclude the selected items from the search result, and in case of

Selected

action will be used to get the selected items, example:

public class MealsMultiLookupController : Controller
{
    public ActionResult GetItems(int[] v)
    {
        var items = new List<Meal>();
        if (v != null)
        {
            items.AddRange(v.Select(Db.Get<Meal>));
        }

        return Json(items.Select(meal => new KeyContent(meal.Id, meal.Name)));
    }

    public ActionResult Search(string search, int[] selected, int page)
    {
        const int pageSize = 10;
        selected = selected ?? new int[] { };
        search = (search ?? "").ToLower().Trim();

        var items = Db.Meals.Where(o => o.Name.ToLower().Contains(search) && !selected.Contains(o.Id));

        return Json(new AjaxListResult
                        {
                            Items = items.Skip((page - 1) * pageSize).Take(pageSize).Select(o => new KeyContent(o.Id, o.Name)),
                            More = items.Count() > page * pageSize
                        });
    }

    public ActionResult Selected(int[] selected)
    {
        var items = new List<Meal>();
        if (selected != null)
        {
            items.AddRange(selected.Select(Db.Get<Meal>));
        }
        
        return Json(new AjaxListResult
                        {
                            Items = items.Select(o => new KeyContent(o.Id, o.Name))
                        });
    }
}