MVC.net 在视图中获取枚举显示名称，而无需在视图中引用枚举类型 [英] MVC.net get enum display name in view without having to refer to enum type in view

问题描述

我在一个 ViewModelBase 类中有以下辅助方法，该类被其他视图模型继承:

I have the following helper method in a ViewModelBase class, which is inherited by other view Models:

public string GetEnumName<T>(Enum value)
        {
            Type enumType = typeof(T);
            var enumValue = Enum.GetName(enumType, value);
            MemberInfo member = enumType.GetMember(enumValue)[0];

            var attrs = member.GetCustomAttributes(typeof(DisplayAttribute), false);
            var outString = ((DisplayAttribute)attrs[0]).Name;

            if (((DisplayAttribute)attrs[0]).ResourceType != null)
            {
                outString = ((DisplayAttribute)attrs[0]).GetName();
            }

            return outString;
        }

然后我从这样的视图中调用它:

I then call this from the view like this:

<p>
@{var rel = Model.GetEnumDisplayName<Enums.wheteverEnum>(Model.wheteverEnum); }
@rel
</p>

问题是 - 我可以使用这个方法，这样我就不必告诉它enum 的类型吗?基本上我想为所有 enums 做这个:

Question is - can I work this method so I don't have to tell it the type of the enum? Basically I'd like todo this for all enums:

@Model.GetEnumDisplayName(Model.wheteverEnum)

@Model.GetEnumDisplayName(Model.wheteverEnum)

没有typeof，没有T，不需要在View中添加对Enums命名空间的引用...

No typeof, no T, no need to add a reference to the Enums namespace in the View...

可能吗?

推荐答案

您可以简单地移除类型参数并使其成为扩展方法.

You can simply remove the type parameter and make it an extension method.

    public static string DisplayName(this Enum value)
    {
        Type enumType = value.GetType();
        var enumValue = Enum.GetName(enumType, value);
        MemberInfo member = enumType.GetMember(enumValue)[0];

        var attrs = member.GetCustomAttributes(typeof(DisplayAttribute), false);
        var outString = ((DisplayAttribute)attrs[0]).Name;

        if (((DisplayAttribute)attrs[0]).ResourceType != null)
        {
            outString = ((DisplayAttribute)attrs[0]).GetName();
        }

        return outString;
    }

    @Model.wheteverEnum.DisplayName()

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