在mvc中如何将对象列表中的两个对象字段组合成一个DropDown

public class MyModel
{
    public int Field1 { get; set; }
    public string Field2 { get; set; }
}

public class HomeController : Controller
{
    public ActionResult Index()
    {
        // 获取对象列表
        List<MyModel> modelList = GetModelList();

        // 提取需要组合的字段
        var dropdownData = modelList.Select(x => new { Value = x.Field1, Text = x.Field1 + " - " + x.Field2 });

        // 创建SelectList
        SelectList dropdownList = new SelectList(dropdownData, "Value", "Text");

        // 将SelectList传递给视图
        ViewBag.DropDown = dropdownList;

        return View();
    }

    private List<MyModel> GetModelList()
    {
        // 从数据库或其他数据源获取对象列表的逻辑
        // 这里只是一个示例，实际情况需要根据具体需求进行实现
        List<MyModel> modelList = new List<MyModel>
        {
            new MyModel { Field1 = 1, Field2 = "Option 1" },
            new MyModel { Field1 = 2, Field2 = "Option 2" },
            new MyModel { Field1 = 3, Field2 = "Option 3" }
        };

        return modelList;
    }
}

@model YourNamespace.MyModel

@{
    ViewBag.Title = "Index";
}

<h2>DropDown Example</h2>

@using (Html.BeginForm())
{
    @Html.DropDownListFor(model => model.Field1, (SelectList)ViewBag.DropDown, "Please select an option")
    <input type="submit" value="Submit" />
}