如何在C＃中获取枚举值的字符串表示形式？

>

字符串表示的字符串表示，请考虑以下枚举：

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

，但是，请求AutheThicationMethod时，您需要字符串“表单”。表单，而不是1的ID。 >

要检索此字符串value，您将需要以下内容：

public class StringValue : System.Attribute
{
    private readonly string _value;

    public StringValue(string value)
    {
        _value = value;
    }

    public string Value
    {
        get { return _value; }
    }

}

>此解决方案允许您获取这样的枚举的字符串值：

public enum AuthenticationMethod
{
    [StringValue("FORMS")]
    FORMS = 1,
    [StringValue("WINDOWS")]
    WINDOWSAUTHENTICATION = 2,
    [StringValue("SSO")]
    SINGLESIGNON = 3
}

，但是，一个更好的解决方案是类型安全性 - 元素模式：

public static class StringEnum
{
    public static string GetStringValue(Enum value)
    {
        string output = null;
        Type type = value.GetType();

        // Look for our 'StringValueAttribute' in the field's custom attributes
        FieldInfo fi = type.GetField(value.ToString());
        StringValue[] attrs = fi.GetCustomAttributes(typeof(StringValue), false) as StringValue[];
        if (attrs.Length > 0)
        {
            output = attrs[0].Value;
        }

        return output;
    }
}

>

string valueOfAuthenticationMethod = StringEnum.GetStringValue(AuthenticationMethod.FORMS);

用于显式（或隐式）类型转换，添加带有映射的静态字段，填充映射在实例构造函数中，然后添加一个用户 - 定义的类型转换运算符：

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;
    }

}

＆lt; pre＆gt; private static patic readonly dictionary＆lt; string，authenticationMethod＆gt;实例= new dictionary＆lt; string，authenticationMethod＆gt;（）;

instance [name] = this;

> public static expatic equipit Operator authenticationMethod（String str）

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