asp.net-mvc-4 - MVC DropDownList 未选择设置

Question

我有一个用于更新操作的 View ，我的模型有一个 enum 属性:

public enum DeliveryStatusType
{
    Active = 1,
    Deactive = 2,
}

基本上，我填充 enum 并使用 DropDownList。为了解发生了什么，我对其进行了简化并尽可能简单地发布在此处。

我已经尝试了 Html.DropDownList 和 Html.DropDownListFor，这里是 View :

第一个例子(这里不设置selected):

@Html.DropDownListFor(model => model.DeliveryStatus, new SelectListItem[] {
        new SelectListItem { 
            Selected = false, 
            Text = "Active Delivery", 
            Value = "1" },
        new SelectListItem { 
            Selected = true, 
            Text = "Deactive Delivery", 
            Value = "2" }}) //Notice that I manually set the 2nd true

第二个例子(这里不设置selected):

@Html.DropDownList("DeliveryStatus", new SelectListItem[] {
        new SelectListItem { 
            Selected = false, 
            Text = "Active Delivery", 
            Value = "1" },
        new SelectListItem { 
            Selected = true, 
            Text = "Deactive Delivery", 
            Value = "2" }}) //Notice that I manually set the 2nd true

但是，我意识到当我设置 SELECT html 元素的名称和 id other than DeliveryStatus(比方说DeliveryStatus1)，它神奇地起作用了!

第三个例子(在此处设置选中):

@Html.DropDownList("DeliveryStatus1", new SelectListItem[] {
        new SelectListItem { 
            Selected = false, 
            Text = "Active Delivery", 
            Value = "1" },
        new SelectListItem { 
            Selected = true, 
            Text = "Deactive Delivery", 
            Value = "2" }}) //Notice that I manually set the 2nd true

但是当我这样做并设置为 DeliveryStatus1 时，我无法将数据发布到 Controller。

这有什么问题或我做错了什么？我需要两者都能够设置所选数据并将其发回

Answer 1

感谢 Stephen Muecke，对于 enums，我将值指定为 Enum.ToString() 而不是 Integer 值。

@Html.DropDownListFor(model => model.DeliveryStatus, new SelectListItem[] {
        new SelectListItem { 
            Selected = false, 
            Text = "Active Delivery", 
            Value = "Active" },
        new SelectListItem { 
            Selected = true, 
            Text = "Deactive Delivery", 
            Value = "Deactive" }})