从多个控制器访问静态selectListItem

public static class SelectListItemExtensions
{
    public static List<SelectListItem> GetStaticSelectListItems()
    {
        return new List<SelectListItem>
        {
            new SelectListItem { Text = "Option 1", Value = "1" },
            new SelectListItem { Text = "Option 2", Value = "2" },
            // ... 其他选项
        };
    }
}

public static class SelectListItemExtensions
{
    public static List<SelectListItem> GetStaticSelectListItems()
    {
        return new List<SelectListItem>
        {
            new SelectListItem { Text = "Option 1", Value = "1" },
            new SelectListItem { Text = "Option 2", Value = "2" },
            // ... 其他选项
        };
    }
}

public class MyController : Controller
{
    public IActionResult Index()
    {
        var selectListItems = SelectListItemExtensions.GetStaticSelectListItems();
        ViewBag.SelectListItems = selectListItems;
        return View();
    }
}

public static class SelectListItemExtensions
{
    private static readonly object _lock = new object();

    public static List<SelectListItem> GetStaticSelectListItems()
    {
        lock (_lock)
        {
            // 获取或更新静态数据
        }
    }
}

public static class SelectListItemExtensions
{
    public static List<SelectListItem> GetStaticSelectListItems()
    {
        var cacheKey = "staticSelectListItems";
        var cachedItems = HttpContext.Current.Cache[cacheKey] as List<SelectListItem>;
        if (cachedItems == null)
        {
            cachedItems = new List<SelectListItem>
            {
                new SelectListItem { Text = "Option 1", Value = "1" },
                new SelectListItem { Text = "Option 2", Value = "2" },
                // ... 其他选项
            };
            HttpContext.Current.Cache.Insert(cacheKey, cachedItems);
        }
        return cachedItems;
    }
}