ASP.NET MVC 中的 MultiSelectList 有问题吗？

Question

这段代码有什么问题？我不知道为什么我不能 select 此下拉列表（如下所示）中的多个值？

<div class="form-group">
    <label>Movie</label>
    @Html.DropDownListFor(m => m.Movies, new MultiSelectList(Model.Movies, "id", "name"), "Select Movie", new { @class = "form-control"})
</div>

源代码来自 Google Chrome:

<select class="form-control" id="Movies" name="Movies"><option value="">Select Movie</option>
   <option value="1">Movie 1</option>
   <option value="2">Movie 2</option>
   <option value="3">Movie 3</option>
   <option value="4">Movie 4</option>
   <option value="5">Movie 5</option>
   <option value="8">Movie 6</option>
   <option value="9">Movie 7</option>
</select>

Answer 1

改用ListBoxFor：

@Html.ListBoxFor(m => m.Movies, new SelectList(Model.Movies, "id", "name"), "Select Movie", new { @class = "form-control"})

或将 multiple 属性添加到 DropDownListFor

@Html.DropDownListFor(m => m.Movies, new MultiSelectList(Model.Movies, "id", "name"), "Select Movie", new {multiple = "true", @class = "form-control"})

ASP.NET MVC 中的 MultiSelectList 有问题吗？

Problem with MultiSelectList in ASP.NET MVC?

c#

html.dropdownlistfor

razor