//to access the enum with its string value you can convert it to object 
//then you can convert enum to object with proberty 
//for Example :

enum days { "one" =3, "tow", "Three" }

let _days: any = days;

if (_days.one == days.one)
{ 
    alert(_days.one + ' | ' + _days[4]);
}

一个俗套的说法是:-

CallStatus.ts

enum Status
{
    PENDING_SCHEDULING,
    SCHEDULED,
    CANCELLED,
    COMPLETED,
    IN_PROGRESS,
    FAILED,
    POSTPONED
}

export = Status

Utils.ts

static getEnumString(enum:any, key:any):string
{
    return enum[enum[key]];
}

如何使用

Utils.getEnumString(Status, Status.COMPLETED); // = "COMPLETED"

在最新版本(1.0RC)的TypeScript中，你可以像这样使用枚举:

enum States {
    New,
    Active,
    Disabled
} 

// this will show message '0' which is number representation of enum member
alert(States.Active); 

// this will show message 'Disabled' as string representation of enum member
alert(States[States.Disabled]);

更新1

要从string value中获取enum成员的number值，你可以使用这个:

var str = "Active";
// this will show message '1'
alert(States[str]);

更新2

在最新的TypeScript 2.4中，引入了字符串enum，如下所示:

enum ActionType {
    AddUser = "ADD_USER",
    DeleteUser = "DELETE_USER",
    RenameUser = "RENAME_USER",

    // Aliases
    RemoveUser = DeleteUser,
}

有关TypeScript 2.4的更多信息，请阅读MSDN上的博客。

我正在寻找一种方法来实现typescript枚举中的描述(v2.5)，这种模式适合我:

export enum PriceTypes {
    Undefined = 0,
    UndefinedDescription = 'Undefined' as any,
    UserEntered = 1,
    UserEnteredDescription = 'User Entered' as any,
    GeneratedFromTrade = 2,
    GeneratedFromTradeDescription = 'Generated From Trade' as any,
    GeneratedFromFreeze = 3,
    GeneratedFromFreezeDescription = 'Generated Rom Freeze' as any
}

...

    GetDescription(e: any, id: number): string {
        return e[e[id].toString() + "Description"];
    }
    getPriceTypeDescription(price: IPricePoint): string {
        return this.GetDescription(PriceTypes, price.priceType);
    }

我认为你应该试试这个，在这种情况下，变量的值不会改变，它的工作方式很像枚举，使用类也可以，唯一的缺点是你可以错误地改变静态变量的值这是我们不希望在枚举中发生的。

namespace portal {

export namespace storageNames {

    export const appRegistration = 'appRegistration';
    export const accessToken = 'access_token';

  }
}

你可以在最新的TypeScript中使用字符串枚举:

enum e
{
    hello = <any>"hello",
    world = <any>"world"
};

来源:https://blog.rsuter.com/how-to-implement-an-enum-with-string-values-in-typescript/

更新- 2016

最近我在React中使用的一种更健壮的方法是这样的:

export class Messages
{
    static CouldNotValidateRequest: string = 'There was an error validating the request';
    static PasswordMustNotBeBlank: string = 'Password must not be blank';   
}

import {Messages as msg} from '../core/messages';
console.log(msg.PasswordMustNotBeBlank);