匿名类型的 ASP.NET razor 三元表达式

Question

我有以下代码:

<div class="col-sm-8 col-sm-pad ">
      @Html.DropDownListFor(model => model.SelectedAssignToId, Model.AssignToListItems,
      ViewBag.CanEditRequest ? new { @class = "form-control" } : new { @class = "form-control", @disabled = "disabled" })
</div>

但我收到以下错误:

error CS0173: Type of conditional expression cannot be determined because there is no implicit conversion between 'AnonymousType#1' and 'AnonymousType#2'

如何在 Razor 中的匿名类型上使用三元表达式？

Answer 1

您可以将三元表达式的一侧转换为 object :

@Html.DropDownListFor(model => model.SelectedAssignToId, Model.AssignToListItems,
ViewBag.CanEditRequest ? (object)new { @class = "form-control" } : new { @class = "form-control", @disabled = "disabled" })

或者尝试将三元表达式移动到匿名类型中，如下所示:

@Html.DropDownListFor(model => model.SelectedAssignToId, Model.AssignToListItems,
new { @class = "form-control", @disabled = ViewBag.CanEditRequest ? null : "disabled" })