Question

此代码有什么问题？我不知道为什么我不能从此Dropdownlist中选择多个值（如下所示）？

<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>

来自Google Chrome的源代码：

<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

改为使用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是否有问题？

1 个答案: