将my list<roomtype>转换为selectlist for asp。NET MVC DropDownfor<>,并获取每个选项的正确值

内置的HTML助手方法不允许为选择列表项生成样式或标题属性。

如果要添加这些属性,则需要创建自己的HTML助手方法,或者只需使用 <% foreach ... %> .

在视图中尝试类似的操作

 <%=Html.DropDownList("userList", new SelectList((IEnumerable)ViewData["RoomTypes"], "Value", "Text",selectedValue)) %>

在你的控制器动作中

 List<SelectListItem> roomTypesSelect = new List<SelectListItem>();

    IList roomTypes = RoomTypeManager.GetAllRoomTypes();
    RoomTypes currentRoomType = RoomTypeManager.GetCurrentRoomType();
    bool isSelected = false;
    foreach (RoomTypes roomTypes in roomTypes)
    {
    if (currentRoomType.Id == roomTypes.Id)
       isSelected = true;
    else
        isSelected = false;

    roomTypes.Add(new SelectListItem { Text = roomTypes.Name + " " +roomTypes.ColourCode, Value = roomTypes.Id, Selected = isSelected });
    }

    ViewData["RoomTypes"] = roomTypes;