Question

我有一个名为InvoiceLine的类，它具有以下属性。

public class InvoiceLine : IEntity
    {
        ...

        public virtual int? OfficeUserId { get; set; }
        public virtual int? FieldUserId { get; set; }
        public virtual bool? OfficeApproved { get; set; }
        public virtual string OfficeRejectionReason { get; set; }
        public virtual DateTime? OfficeApprovedDate { get; set; }
        public virtual bool? FieldApproved { get; set; }
        public virtual string FieldRejectionReason { get; set; }
        public virtual DateTime? FieldApprovedDate { get; set; }

        ...

        public virtual User OfficeUser { get; set; }
        public virtual User FieldUser { get; set; }

        ...
}

我希望在表格中显示如下内容：

<td>Office sign off: Conan the Barbarian Approved</td>
<td>Field sign off: Steve the snake Not Approved</td>

所以我写道：

<td>Office sign off:
                        @Html.DisplayFor(modelItem => invoiceLine.OfficeUser.UserName)
                        @Html.DisplayFor(modelItem => invoiceLine.OfficeApproved)
                    </td>
                    <td>Field sign off:
                        @Html.DisplayFor(modelItem => invoiceLine.FieldUser.UserName)
                        @Html.DisplayFor(modelItem => invoiceLine.FieldApproved)
                    </td>

显然，这并没有提供所需的格式，并提供了类似的内容：

<td>
Office sign off: Conan the Barbarian
<select class="tri-state list-box" disabled="disabled">
<option value="">Not Set</option>
<option value="true" selected="selected">True</option>
<option value="false">False</option>
</select>
</td>

<td>
Office sign off: Steve the snake
<select class="tri-state list-box" disabled="disabled">
<option value="">Not Set</option>
<option value="true">True</option>
<option value="false" selected="selected">False</option>
</select>
</td>

所以我在下拉列表中获得批准的布尔值是有意义的。如我前面所述，如何让它显示？

Answer 1

最简单的方法是忽略内置帮助程序并将其写出如下：

@( invoiceLine.FieldApproved.HasValue ? (invoiceLine.FieldApproved.Value ? "Approved" : "Not Approved"):"Not Specified" )

但是，你最好的办法就是编写自己的HTML处理程序（特别是如果这是一项常见任务，将在详细信息页面上使用等）。

public static MvcHtmlString ApprovedBoolFor<TModel, bool?>(this HtmlHelper<TModel> html, Expression<Func<TModel, bool?>> selector)
{
    var prop = selector.Compile().Invoke(html.ViewData.Model);
    var appVal = prop.HasValue ?
              (prop.Value ? "Approved" : "Not Approved")
              : "Not specified";

    return new MvcHtmlString(appVal);
}

MVC如何将布尔表值显示为替代文本值

1 个答案: