如何向枚举添加多个属性?

How do I add multiple attributes to an Enum?

我有一个名为 ClientCreditResolutionPlanActionType 的 SQL 查找 -table,我想将其转换为 in

非常基本的要求,对吧?对。

我的 table,现在 ,但是,有几个列,或者现在,需要与之一起使用的描述属性:


所以我想我可以做...

namespace System.ComponentModel
{
    class StatusIconAttribute : Attribute
    {
        public string StatusIcon;
        public StatusIconAttribute(string statusIcon) { StatusIcon = statusIcon; }
    }

    class StatusTextAttribute : Attribute
    {
        public string StatusText;
        public StatusTextAttribute(string statusText) { StatusText = statusText; }
    }

    class TypeTextAttribute : Attribute
    {
        public string TypeText;
        public TypeTextAttribute(string typeText) { TypeText = typeText; }
    }
}

... 在我的 Extensions.cs class ...

public static class EnumExtensions
{
    public static string GetStatusIcon(this Enum value)
    {
        var type = value.GetType();

        string name = Enum.GetName(type, value);              
        if (name == null) { return null; }

        var field = type.GetField(name);
        if (field == null) { return null; }

        var attr = Attribute.GetCustomAttribute(field, typeof(StatusIconAttribute)) as StatusIconAttribute;
        if (attr == null) { return null; }

        return attr.StatusIcon;
    }

    public static string GetStatusText(this Enum value)
    {
        var type = value.GetType();

        string name = Enum.GetName(type, value);              
        if (name == null) { return null; }

        var field = type.GetField(name);
        if (field == null) { return null; }

        var attr = Attribute.GetCustomAttribute(field, typeof(StatusTextAttribute)) as StatusTextAttribute;
        if (attr == null) { return null; }

        return attr.StatusText;
    }

    public static string GetTypeText(this Enum value)
    {
        var type = value.GetType();
        string name = Enum.GetName(type, value);              

        var type = value.GetType();

        string name = Enum.GetName(type, value);              
        if (name == null) { return null; }

        var field = type.GetField(name);
        if (field == null) { return null; }

        var attr = Attribute.GetCustomAttribute(field, typeof(TypeTextAttribute)) as TypeTextAttribute;
       if (attr == null) { return null; }

        return attr.TypeText;
    }
}

...最后在我的其他项目中使用它:

namespace ClientSystemServiceLibrary.Enums
{
    [DataContract]
    public enum ClientCreditResolutionPlanActionType
    {
        [EnumMember]
        [TypeText("New resolution plan submitted.")]
        [StatusText("New Plan")]
        [StatusIcon("star.png")]
        NewPlan = 1,

        [EnumMember]
        [TypeText("Resolution plan waiting on approval.")]
        [StatusText("Under Review")]
        [StatusIcon("review.png")]
        UnderReview = 2,

        [EnumMember]
        [TypeText("Resolution plan approved.")]
        [StatusText("Approved")]
        [StatusIcon("check.png")]
        Approved = 3,

        [EnumMember]
        [TypeText("Resolution plan rejected.")]
        [StatusText("Rejected")]
        [StatusIcon("cross.png")]
        Rejected = 4,

        [EnumMember]
        [TypeText("New resolution plan comment submitted.")]
        [StatusText("New Comment")]
        [StatusIcon("message.png")]
        NewComment = 5
    }
}E

除了,我认为是错误的,因为我收到了这些错误消息:

'System.CompenentModel.TypeTextAttribute' is inaccessible due to its protection level

The type or namespace name 'TypeText' could not be found (are you missing a using directive or an assembly reference?)

所有 3 个都一样...

默认情况下,所有 类 都是内部的。如果您希望其他程序集可以访问它们,您应该指定 "public" 访问修饰符。像这样:

public class TypeTextAttribute : Attribute
{
    public string TypeText;
    public TypeTextAttribute(string typeText) { TypeText = typeText; }
}