ASP.NET MVC:如何调用方法并在控制器中填充SelectList？

private SelectList GetSelectList()
{
    // 从数据源获取数据，例如数据库查询或API调用
    var data = new List<SelectListItem>
    {
        new SelectListItem { Value = "1", Text = "Option 1" },
        new SelectListItem { Value = "2", Text = "Option 2" },
        new SelectListItem { Value = "3", Text = "Option 3" }
    };

    // 将数据转换为SelectList类型
    var selectList = new SelectList(data, "Value", "Text");

    return selectList;
}

public ActionResult Index()
{
    var selectList = GetSelectList();

    // 在视图模型中设置SelectList属性
    var viewModel = new YourViewModel
    {
        SelectList = selectList
    };

    return View(viewModel);
}

@model YourViewModel

@Html.DropDownListFor(m => m.SelectedOption, Model.SelectList, "Please select an option")