asp.net-mvc – 如何使用ASP.NET Razor语法应用bootstrap v4表单输入验证类？

以下代码：

查看：(IS-有效)

<div class="form-group">
    @Html.LabelFor(m => m.Telefone,new { @class = "font-weight-bold" })
    @Html.TextBoxFor(m => m.Telefone,new { @class = "form-control is-valid",@placeholder = "Digite seu telefone" })
    @Html.ValidationMessageFor(m => m.Telefone,"",new { @class = "text-danger" })
</div>

查看：(IS-无效)

<div class="form-group">
    @Html.LabelFor(m => m.Telefone,new { @class = "form-control is-invalid",new { @class = "text-danger" })
</div>

示例：https://getbootstrap.com/docs/4.0/components/forms/#server-side

有解决方案吗

解决方法

使用Tag Helpers的简单解决方案：

<div class="form-group">
            <input asp-for="Email" class="form-control">
            <div class="invalid-Feedback" style="display:block;">
                <span asp-validation-for="Email"></span>
            </div>
        </div>