EnumDropDownListFor 有条件地隐藏项目

Question

我想根据用户是否登录有条件地隐藏EnumDropDownListFor 中的元素。

枚举

public enum SortType
{
    [Display(ResourceType = typeof(NavigationItems), Name = "BestMatch")]
    Best_Match = 0,
    [Display(ResourceType = typeof(NavigationItems), Name = "Alphabetical")]
    Alphabetical,
    [Display(ResourceType = typeof(NavigationItems), Name = "PriceAsc")]
    PriceAsc,
    [Display(ResourceType = typeof(NavigationItems), Name = "PriceDesc")]
    PriceDesc
}

我要隐藏的项目是PriceAsc & PriceDesc
我尝试查看 AutoGenerateFilter 和 AutoGenerateField 属性无济于事。

查看

@Html.EnumDropDownListFor(x => x.sortType, new { id = "orderResults" })

Answer 1

var sortTypesToExclude = new[] { SortType.PriceAsc, SortType.PriceDesc }.Cast<int>();
var sortTypes = Enum.GetValues(typeof(SortType)).Cast<int>().Where(i => userLoggedIn || !sortTypesToExclude.Contains(i));
var sortTypesAsSelectList = sortTypes.Select(i => new SelectListItem() { Value = i.ToString(), Text = ((SortType)i).ToString() });