如何通过MVC Razor代码获得Enum成员的显示名称属性?

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>

当前回答

这可能是欺骗，但它是有效的:

 @foreach (var yourEnum in Html.GetEnumSelectList<YourEnum>())
 {
     @yourEnum.Text
 }

2021-01-29 14:51:53

其他回答

假设你的枚举名称是OrderState，使用以下代码:

@Html.DropDownList("selectList", new SelectList(Html.GetEnumSelectList<OrderState>(), "Value", "Text",ViewBag.selectedOrderState), new {@id="OrderState", @class = "form-control" })

在后台设置选中的选项:

 var selectedOrderState = ..Data.OrderState.GetHashCode();
        ViewBag.selectedOrderState = selectedOrderState;

2022-10-29 11:33:48

有了Core 2.1，

public static string GetDisplayName(Enum enumValue)
{
  return enumValue.GetType()?
 .GetMember(enumValue.ToString())?[0]?
 .GetCustomAttribute<DisplayAttribute>()?
 .Name;
}

2018-08-27 11:35:48

你需要使用一些反射来访问该属性:

var type = typeof(UserPromotion);
var member = type.GetMember(Model.JobSeeker.Promotion.ToString());
var attributes = member[0].GetCustomAttributes(typeof(DisplayAttribute), false);
var name = ((DisplayAttribute)attributes[0]).Name;

我建议将此方法包装在扩展方法中，或者在视图模型中执行此操作。

2012-10-27 11:49:18

在Aydin和Todd回答的基础上，下面是一个扩展方法，它还可以让您从资源文件中获得名称

using AppResources;
using System;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Reflection;
using System.Resources;

public static class EnumExtensions
{
    public static string GetDisplayName(this Enum enumValue)
    {
        var enumMember= enumValue.GetType()
                        .GetMember(enumValue.ToString());

        DisplayAttribute displayAttrib = null;
        if (enumMember.Any()) {
            displayAttrib = enumMember 
                        .First()
                        .GetCustomAttribute<DisplayAttribute>();
        }

        string name = null;
        Type resource = null;

        if (displayAttrib != null)
        {
            name = displayAttrib.Name;
            resource = displayAttrib.ResourceType;
        }

        return String.IsNullOrEmpty(name) ? enumValue.ToString()
            : resource == null ?  name
            : new ResourceManager(resource).GetString(name);
    }
}

然后像这样使用它

public enum Season 
{
    [Display(ResourceType = typeof(Resource), Name = Season_Summer")]
    Summer
}

2015-03-11 15:49:59

在。net 5中，我使用了DisplayTextFor而不需要helper或扩展方法:

@Html.DisplayTextFor(m => m.SomeEnumProperty)

SomeEnumProperty的值为:

public enum MyEnum
{
    [Display(Name = "Not started")]
    NotStarted = 0,
    [Display(Name = "Weird display name instead of just 'Started'")]
    Started = 1,
}

2021-01-13 16:03:35

如何通过MVC Razor代码获得Enum成员的显示名称属性?

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