如果我理解正确，你可以简单地使用.ToString()从值中检索enum的名称(假设它已经被转换为enum); 如果你有裸整型(比如从数据库或其他地方)，你可以先将它强制转换为枚举。 下面的两个方法都将获得枚举名称。

AuthenticationMethod myCurrentSetting = AuthenticationMethod.FORMS;
Console.WriteLine(myCurrentSetting); // Prints: FORMS
string name = Enum.GetNames(typeof(AuthenticationMethod))[(int)myCurrentSetting-1];
Console.WriteLine(name); // Prints: FORMS

但是请记住，第二种技术假设您使用的是int型，并且您的索引基于1(而不是基于0)。相比之下，GetNames函数也相当繁重，每次调用它都要生成一个完整的数组。 正如您在第一种技术中看到的，. tostring()实际上是隐式调用的。 这两个问题都已经在答案中提到了，当然，我只是想澄清它们之间的区别。

我如何解决这个扩展方法:

using System.ComponentModel;
public static string GetDescription(this Enum value)
{
    var descriptionAttribute = (DescriptionAttribute)value.GetType()
        .GetField(value.ToString())
        .GetCustomAttributes(false)
        .Where(a => a is DescriptionAttribute)
        .FirstOrDefault();

    return descriptionAttribute != null ? descriptionAttribute.Description : value.ToString();
}

枚举:

public enum OrderType
{
    None = 0,
    [Description("New Card")]
    NewCard = 1,
    [Description("Reload")]
    Refill = 2
}

用法(其中o.OrderType是一个与enum同名的属性):

o.OrderType.GetDescription()

这给了我一个字符串的“新卡”或“重载”，而不是实际的enum值NewCard和重新填充。

对于较大的字符串enum集，列出的示例可能会变得令人厌烦。如果您想要一个状态代码列表，或者其他基于字符串的枚举列表，那么属性系统使用起来很麻烦，而带有自身实例的静态类配置起来也很麻烦。对于我自己的解决方案，我使用了T4模板，以便更容易地使用字符串支持的枚举。结果与HttpMethod类的工作方式类似。

你可以这样使用它:

    string statusCode = ResponseStatusCode.SUCCESS; // Automatically converts to string when needed
    ResponseStatusCode codeByValueOf = ResponseStatusCode.ValueOf(statusCode); // Returns null if not found

    // Implements TypeConverter so you can use it with string conversion methods.
    var converter = System.ComponentModel.TypeDescriptor.GetConverter(typeof(ResponseStatusCode));
    ResponseStatusCode code = (ResponseStatusCode) converter.ConvertFromInvariantString(statusCode);

    // You can get a full list of the values
    bool canIterateOverValues = ResponseStatusCode.Values.Any(); 

    // Comparisons are by value of the "Name" property. Not by memory pointer location.
    bool implementsByValueEqualsEqualsOperator = "SUCCESS" == ResponseStatusCode.SUCCESS; 

你从Enum开始。tt文件。

<#@ include file="StringEnum.ttinclude" #>


<#+
public static class Configuration
{
    public static readonly string Namespace = "YourName.Space";
    public static readonly string EnumName = "ResponseStatusCode";
    public static readonly bool IncludeComments = true;

    public static readonly object Nodes = new
    {
        SUCCESS = "The response was successful.",
        NON_SUCCESS = "The request was not successful.",
        RESOURCE_IS_DISCONTINUED = "The resource requested has been discontinued and can no longer be accessed."
    };
}
#>

然后，添加StringEnum。ttinclude文件。

<#@ template debug="false" hostspecific="false" language="C#" #>
<#@ assembly name="System.Core" #>
<#@ import namespace="System" #>
<#@ import namespace="System.Linq" #>
<#@ import namespace="System.Text" #>
<#@ import namespace="System.Reflection" #>
<#@ import namespace="System.Collections.Generic" #>
<#@ output extension=".cs" #>
<#@ CleanupBehavior processor="T4VSHost" CleanupAfterProcessingtemplate="true" #>

//------------------------------------------------------------------------------
// <auto-generated>
//     This code was generated by a tool.
//
//     Changes to this file may cause incorrect behavior and will be lost if
//     the code is regenerated.
// </auto-generated>
//------------------------------------------------------------------------------

using System;
using System.Linq;
using System.Collections.Generic;
using System.ComponentModel;
using System.Globalization;

namespace <#= Configuration.Namespace #>
{
    /// <summary>
    /// TypeConverter implementations allow you to use features like string.ToNullable(T).
    /// </summary>
    public class <#= Configuration.EnumName #>TypeConverter : TypeConverter
    {
        public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
        {
            return sourceType == typeof(string) || base.CanConvertFrom(context, sourceType);
        }

        public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
        {
            var casted = value as string;

            if (casted != null)
            {
                var result = <#= Configuration.EnumName #>.ValueOf(casted);
                if (result != null)
                {
                    return result;
                }
            }

            return base.ConvertFrom(context, culture, value);
        }

        public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
        {
            var casted = value as <#= Configuration.EnumName #>;
            if (casted != null && destinationType == typeof(string))
            {
                return casted.ToString();
            }

            return base.ConvertTo(context, culture, value, destinationType);
        }
    }

    [TypeConverter(typeof(<#= Configuration.EnumName #>TypeConverter))]
    public class <#= Configuration.EnumName #> : IEquatable<<#= Configuration.EnumName #>>
    {
//---------------------------------------------------------------------------------------------------
// V A L U E S _ L I S T
//---------------------------------------------------------------------------------------------------
<# Write(Helpers.PrintEnumProperties(Configuration.Nodes)); #>

        private static List<<#= Configuration.EnumName #>> _list { get; set; } = null;
        public static List<<#= Configuration.EnumName #>> ToList()
        {
            if (_list == null)
            {
                _list = typeof(<#= Configuration.EnumName #>).GetFields().Where(x => x.IsStatic && x.IsPublic && x.FieldType == typeof(<#= Configuration.EnumName #>))
                    .Select(x => x.GetValue(null)).OfType<<#= Configuration.EnumName #>>().ToList();
            }

            return _list;
        }

        public static List<<#= Configuration.EnumName #>> Values()
        {
            return ToList();
        }

        /// <summary>
        /// Returns the enum value based on the matching Name of the enum. Case-insensitive search.
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        public static <#= Configuration.EnumName #> ValueOf(string key)
        {
            return ToList().FirstOrDefault(x => string.Compare(x.Name, key, true) == 0);
        }


//---------------------------------------------------------------------------------------------------
// I N S T A N C E _ D E F I N I T I O N
//---------------------------------------------------------------------------------------------------      
        public string Name { get; private set; }
        public string Description { get; private set; }
        public override string ToString() { return this.Name; }

        /// <summary>
        /// Implcitly converts to string.
        /// </summary>
        /// <param name="d"></param>
        public static implicit operator string(<#= Configuration.EnumName #> d)
        {
            return d.ToString();
        }

        /// <summary>
        /// Compares based on the == method. Handles nulls gracefully.
        /// </summary>
        /// <param name="a"></param>
        /// <param name="b"></param>
        /// <returns></returns>
        public static bool operator !=(<#= Configuration.EnumName #> a, <#= Configuration.EnumName #> b)
        {
            return !(a == b);
        }

        /// <summary>
        /// Compares based on the .Equals method. Handles nulls gracefully.
        /// </summary>
        /// <param name="a"></param>
        /// <param name="b"></param>
        /// <returns></returns>
        public static bool operator ==(<#= Configuration.EnumName #> a, <#= Configuration.EnumName #> b)
        {
            return a?.ToString() == b?.ToString();
        }

        /// <summary>
        /// Compares based on the .ToString() method
        /// </summary>
        /// <param name="o"></param>
        /// <returns></returns>
        public override bool Equals(object o)
        {
            return this.ToString() == o?.ToString();
        }

        /// <summary>
        /// Compares based on the .ToString() method
        /// </summary>
        /// <param name="other"></param>
        /// <returns></returns>
        public bool Equals(<#= Configuration.EnumName #> other)
        {
            return this.ToString() == other?.ToString();
        }

        /// <summary>
        /// Compares based on the .Name property
        /// </summary>
        /// <returns></returns>
        public override int GetHashCode()
        {
            return this.Name.GetHashCode();
        }
    }
}

<#+

public static class Helpers
{
        public static string PrintEnumProperties(object nodes)
        {
            string o = "";
            Type nodesTp = Configuration.Nodes.GetType();
            PropertyInfo[] props = nodesTp.GetProperties().OrderBy(p => p.Name).ToArray();

            for(int i = 0; i < props.Length; i++)
            {
                var prop = props[i];
                if (Configuration.IncludeComments)
                {
                    o += "\r\n\r\n";
                    o += "\r\n        ///<summary>";
                    o += "\r\n        /// "+Helpers.PrintPropertyValue(prop, Configuration.Nodes);
                    o += "\r\n        ///</summary>";
                }

                o += "\r\n        public static readonly "+Configuration.EnumName+" "+prop.Name+ " = new "+Configuration.EnumName+"(){ Name = \""+prop.Name+"\", Description = "+Helpers.PrintPropertyValue(prop, Configuration.Nodes)+ "};";
            }

            o += "\r\n\r\n";

            return o;
        }

        private static Dictionary<string, string> GetValuesMap()
        {
            Type nodesTp = Configuration.Nodes.GetType();
            PropertyInfo[] props= nodesTp.GetProperties();
            var dic = new Dictionary<string,string>();
            for(int i = 0; i < props.Length; i++)
            {
                var prop = nodesTp.GetProperties()[i];
                dic[prop.Name] = prop.GetValue(Configuration.Nodes).ToString();
            }
            return dic;
        }

        public static string PrintMasterValuesMap(object nodes)
        {
            Type nodesTp = Configuration.Nodes.GetType();
            PropertyInfo[] props= nodesTp.GetProperties();
            string o = "        private static readonly Dictionary<string, string> ValuesMap = new Dictionary<string, string>()\r\n        {";
            for(int i = 0; i < props.Length; i++)
            {
                var prop = nodesTp.GetProperties()[i];
                o += "\r\n            { \""+prop.Name+"\", "+(Helpers.PrintPropertyValue(prop,Configuration.Nodes)+" },");
            }
            o += ("\r\n        };\r\n");

            return o;
        }


        public static string PrintPropertyValue(PropertyInfo prop, object objInstance)
        {
            switch(prop.PropertyType.ToString()){
                case "System.Double":
                    return prop.GetValue(objInstance).ToString()+"D";
                case "System.Float":
                    return prop.GetValue(objInstance).ToString()+"F";
                case "System.Decimal":
                    return prop.GetValue(objInstance).ToString()+"M";
                case "System.Long":
                    return prop.GetValue(objInstance).ToString()+"L";
                case "System.Boolean":
                case "System.Int16":
                case "System.Int32":
                    return prop.GetValue(objInstance).ToString().ToLowerInvariant();
                case "System.String":
                    return "\""+prop.GetValue(objInstance)+"\"";
            }

            return prop.GetValue(objInstance).ToString();
        }

        public static string _ (int numSpaces)
        {
            string o = "";
            for(int i = 0; i < numSpaces; i++){
                o += " ";
            }

            return o;
        }
}
#>

最后，重新编译Enum。Tt文件，输出如下所示:

//------------------------------------------------------------------------------
// <auto-generated>
//     This code was generated by a tool.
//
//     Changes to this file may cause incorrect behavior and will be lost if
//     the code is regenerated.
// </auto-generated>
//------------------------------------------------------------------------------

using System;
using System.Linq;
using System.Collections.Generic;

namespace YourName.Space
{
    public class ResponseStatusCode
    {
//---------------------------------------------------------------------------------------------------
// V A L U E S _ L I S T 
//---------------------------------------------------------------------------------------------------



        ///<summary>
        /// "The response was successful."
        ///</summary>
        public static readonly ResponseStatusCode SUCCESS = new ResponseStatusCode(){ Name = "SUCCESS", Description = "The response was successful."};


        ///<summary>
        /// "The request was not successful."
        ///</summary>
        public static readonly ResponseStatusCode NON_SUCCESS = new ResponseStatusCode(){ Name = "NON_SUCCESS", Description = "The request was not successful."};


        ///<summary>
        /// "The resource requested has been discontinued and can no longer be accessed."
        ///</summary>
        public static readonly ResponseStatusCode RESOURCE_IS_DISCONTINUED = new ResponseStatusCode(){ Name = "RESOURCE_IS_DISCONTINUED", Description = "The resource requested has been discontinued and can no longer be accessed."};


        private static List<ResponseStatusCode> _list { get; set; } = null;
        public static List<ResponseStatusCode> ToList()
        {
            if (_list == null)
            {
                _list = typeof(ResponseStatusCode).GetFields().Where(x => x.IsStatic && x.IsPublic && x.FieldType == typeof(ResponseStatusCode))
                    .Select(x => x.GetValue(null)).OfType<ResponseStatusCode>().ToList();
            }

            return _list;
        }

        public static List<ResponseStatusCode> Values()
        {
            return ToList();
        }

        /// <summary>
        /// Returns the enum value based on the matching Name of the enum. Case-insensitive search.
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        public static ResponseStatusCode ValueOf(string key)
        {
            return ToList().FirstOrDefault(x => string.Compare(x.Name, key, true) == 0);
        }


//---------------------------------------------------------------------------------------------------
// I N S T A N C E _ D E F I N I T I O N 
//---------------------------------------------------------------------------------------------------       
        public string Name { get; set; }
        public string Description { get; set; }
        public override string ToString() { return this.Name; }

        /// <summary>
        /// Implcitly converts to string.
        /// </summary>
        /// <param name="d"></param>
        public static implicit operator string(ResponseStatusCode d)
        {
            return d.ToString();
        }

        /// <summary>
        /// Compares based on the == method. Handles nulls gracefully.
        /// </summary>
        /// <param name="a"></param>
        /// <param name="b"></param>
        /// <returns></returns>
        public static bool operator !=(ResponseStatusCode a, ResponseStatusCode b)
        {
            return !(a == b);
        }

        /// <summary>
        /// Compares based on the .Equals method. Handles nulls gracefully.
        /// </summary>
        /// <param name="a"></param>
        /// <param name="b"></param>
        /// <returns></returns>
        public static bool operator ==(ResponseStatusCode a, ResponseStatusCode b)
        {
            return a?.ToString() == b?.ToString();
        }

        /// <summary>
        /// Compares based on the .ToString() method
        /// </summary>
        /// <param name="o"></param>
        /// <returns></returns>
        public override bool Equals(object o)
        {
            return this.ToString() == o?.ToString();
        }

        /// <summary>
        /// Compares based on the .Name property
        /// </summary>
        /// <returns></returns>
        public override int GetHashCode()
        {
            return this.Name.GetHashCode();
        }
    }
}

选项1:

public sealed class FormsAuth
{
     public override string ToString{return "Forms Authtentication";}
}
public sealed class WindowsAuth
{
     public override string ToString{return "Windows Authtentication";}
}

public sealed class SsoAuth
{
     public override string ToString{return "SSO";}
}

然后

object auth = new SsoAuth(); //or whatever

//...
//...
// blablabla

DoSomethingWithTheAuth(auth.ToString());

选项2:

public enum AuthenticationMethod
{
        FORMS = 1,
        WINDOWSAUTHENTICATION = 2,
        SINGLESIGNON = 3
}

public class MyClass
{
    private Dictionary<AuthenticationMethod, String> map = new Dictionary<AuthenticationMethod, String>();
    public MyClass()
    {
         map.Add(AuthenticationMethod.FORMS,"Forms Authentication");
         map.Add(AuthenticationMethod.WINDOWSAUTHENTICATION ,"Windows Authentication");
         map.Add(AuthenticationMethod.SINGLESIGNON ,"SSo Authentication");
    }
}

试试type-safe-enum模式。

public sealed class AuthenticationMethod {

    private readonly String name;
    private readonly int value;

    public static readonly AuthenticationMethod FORMS = new AuthenticationMethod (1, "FORMS");
    public static readonly AuthenticationMethod WINDOWSAUTHENTICATION = new AuthenticationMethod (2, "WINDOWS");
    public static readonly AuthenticationMethod SINGLESIGNON = new AuthenticationMethod (3, "SSN");        

    private AuthenticationMethod(int value, String name){
        this.name = name;
        this.value = value;
    }

    public override String ToString(){
        return name;
    }

}

更新 显式(或隐式)类型转换可以通过

adding static field with mapping private static readonly Dictionary<string, AuthenticationMethod> instance = new Dictionary<string,AuthenticationMethod>(); n.b. In order that the initialisation of the the "enum member" fields doesn't throw a NullReferenceException when calling the instance constructor, be sure to put the Dictionary field before the "enum member" fields in your class. This is because static field initialisers are called in declaration order, and before the static constructor, creating the weird and necessary but confusing situation that the instance constructor can be called before all static fields have been initialised, and before the static constructor is called. filling this mapping in instance constructor instance[name] = this; and adding user-defined type conversion operator public static explicit operator AuthenticationMethod(string str) { AuthenticationMethod result; if (instance.TryGetValue(str, out result)) return result; else throw new InvalidCastException(); }

用. net 4.0及以上版本解决这个问题非常简单。不需要其他代码。

public enum MyStatus
{
    Active = 1,
    Archived = 2
}

获取字符串about只需使用:

MyStatus.Active.ToString("f");

or

MyStatus.Archived.ToString("f");`

取值为Active或Archived。

当调用Enum时，查看不同的字符串格式(上面的“f”)。ToString参见此枚举格式字符串页面