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asp.net - 某些标记语法破坏剃刀解析

问题描述

下面的代码片段打破了剃刀解析和智能感知，你不知道为什么它不起作用（是的，我确实找到了解决方法，但它仍然困扰着我）。

<select class="form-control" @(ViewBag.View ? "disabled" : string.Empty) asp-for="repetitiveness" asp-items="Html.GetEnumSelectList<TaskRepetitiveness>()">
    @if (ViewBag.View)
    {
        <option selected="selected" value="">@(EnumHelper<TaskRepetitiveness>.GetDisplayValue(Model.repetitiveness))</option>
    }
</select>

禁用的案例评估良好，但空字符串案例似乎有问题（以下是使用浏览器测试后的输出）：

<select class="form-control" asp-for="repetitiveness" asp-items="Html.GetEnumSelectList<TaskRepetitiveness>()"></select>

这是智能感知在行动：

图片 图片 Ps 它仍然打破了标签助手的大括号：

图片

标签： asp.netasp.net-mvcrazorasp.net-core

解决方案

Razor is only valid within a tag when enclosed within quotes and assigned to an HTML attribute. In other words, something like the following should work:

<select  class="form-control" disabled="@(ViewBag.View as bool? ?? false)" asp-for="repetitiveness" asp-items="Html.GetEnumSelectList<TaskRepetitiveness>()">

This may seem like it won't work because specifying disabled at all causes the field to be disabled, but Razor is smart enough to remove the attribute if it's false.

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