我在我的模型中有一个属性叫做Promotion,它的类型是一个标志enum叫做UserPromotion。枚举成员的显示属性设置如下:
[Flags]
public enum UserPromotion
{
None = 0x0,
[Display(Name = "Send Job Offers By Mail")]
SendJobOffersByMail = 0x1,
[Display(Name = "Send Job Offers By Sms")]
SendJobOffersBySms = 0x2,
[Display(Name = "Send Other Stuff By Sms")]
SendPromotionalBySms = 0x4,
[Display(Name = "Send Other Stuff By Mail")]
SendPromotionalByMail = 0x8
}
现在我想要能够在我的视图中创建一个ul来显示我的Promotion属性的选定值。这就是我到目前为止所做的但问题是,我如何在这里获得显示名称?
<ul>
@foreach (int aPromotion in @Enum.GetValues(typeof(UserPromotion)))
{
var currentPromotion = (int)Model.JobSeeker.Promotion;
if ((currentPromotion & aPromotion) == aPromotion)
{
<li>Here I don't know how to get the display attribute of "currentPromotion".</li>
}
}
</ul>
ASP。Net Core 3.0,这对我很有用(归功于之前的回答)。
我的Enum类:
using System;
using System.Linq;
using System.ComponentModel.DataAnnotations;
using System.Reflection;
public class Enums
{
public enum Duration
{
[Display(Name = "1 Hour")]
OneHour,
[Display(Name = "1 Day")]
OneDay
}
// Helper method to display the name of the enum values.
public static string GetDisplayName(Enum value)
{
return value.GetType()?
.GetMember(value.ToString())?.First()?
.GetCustomAttribute<DisplayAttribute>()?
.Name;
}
}
我的视图模型类:
public class MyViewModel
{
public Duration Duration { get; set; }
}
显示标签和下拉列表的剃刀视图示例。注意下拉列表不需要helper方法:
@model IEnumerable<MyViewModel>
@foreach (var item in Model)
{
<label asp-for="@item.Duration">@Enums.GetDisplayName(item.Duration)</label>
<div class="form-group">
<label asp-for="@item.Duration" class="control-label">Select Duration</label>
<select asp-for="@item.Duration" class="form-control"
asp-items="Html.GetEnumSelectList<Enums.Duration>()">
</select>
</div>
}