Question

我有一个选择列表，我在我的视图模型中首先设置如下：

  public string selectedLocation { get; set; }

        public SelectList location = new SelectList(new[]
        { 
            new SelectListItem { Text = "United Kingdom", Value = "GB" },
            new SelectListItem  {Text = "United States", Value = "US" , Selected = true },
            new SelectListItem { Text = "United Kingdom", Value = "GB" },
            new SelectListItem  { Text = "Australia", Value = "AU" },
            new SelectListItem  { Text = "China", Value = "CN" },
            new SelectListItem  { Text = "France", Value = "FR" },
            new SelectListItem  { Text = "Germany", Value = "DE" },
            new SelectListItem  { Text = "Italy", Value = "IT" },
            new SelectListItem  { Text = "Canada", Value = "CA" }
        }, "Value", "Text");

正如您所看到的，我已经设置了美国的默认值 - 选择为true，因此应该通过某种逻辑在下拉列表中选择此值吗？

这是我用HTML显示的地方：

@Html.DropDownListFor(model => model.selectedLocation, Model.location, new { @class = "select2", @style = "width:95%;border-left:2px solid #eee" })

但是，无论我在viewmodel中设置什么，下拉列表中的所选项目始终是第一个...

我在这里做错了什么？：/

Answer 1

所以问题的根源是我必须在将模型传递到视图中之前设置model.selectedLocation值并将其渲染为：

public ActionResult Index()
{ 
   var model = new myClassViewModel();
   model.selectedLocation = "IT"; // as rene stated
   return View(model);
}

感谢@rene

剃刀选择列表（dropdownlistfor）设置默认选择值

1 个答案: