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<form method="get" action=@Url.Action("Index") data-otf-ajax="true" data-otf-target="#restaurantList" >
            <input type="text" name="search" value="" data-otf-autocomplete=@Url.Action("Autocomplete") />
            <input type="submit" value="Search by name" />
        </form>

public ActionResult Autocomplete(string term)
{
    var model = db.Restaurants
        .Where(r => r.Name.StartsWith(term))
        .Take(10)
        .Select(r => new { label = r.Name });
    return Json(model, JsonRequestBehavior.AllowGet);
}

$(function () {
    var createAutocomplete = function () {
        $input = $(this);
        var options = {
            source: $input.attr("data-otf-autocomplete")
        }
        $input.autocomplete(options);
    }

    $("input[data-otf-autocomplete]").each(createAutocomplete);
})