为什么不直接使用本地方式访问枚举的字符串呢?

enum e {
  WHY,
  NOT,
  USE,
  NATIVE
}

e[e.WHY] // this returns string 'WHY'

这里有一个相当干净的解决方案，它允许继承，使用TypeScript 2.0。我没有在早期的版本上尝试过。

附加条件:该值可以是任何类型!

export class Enum<T> {
  public constructor(public readonly value: T) {}
  public toString() {
    return this.value.toString();
  }
}

export class PrimaryColor extends Enum<string> {
  public static readonly Red = new Enum('#FF0000');
  public static readonly Green = new Enum('#00FF00');
  public static readonly Blue = new Enum('#0000FF');
}

export class Color extends PrimaryColor {
  public static readonly White = new Enum('#FFFFFF');
  public static readonly Black = new Enum('#000000');
}

// Usage:

console.log(PrimaryColor.Red);
// Output: Enum { value: '#FF0000' }
console.log(Color.Red); // inherited!
// Output: Enum { value: '#FF0000' }
console.log(Color.Red.value); // we have to call .value to get the value.
// Output: #FF0000
console.log(Color.Red.toString()); // toString() works too.
// Output: #FF0000

class Thing {
  color: Color;
}

let thing: Thing = {
  color: Color.Red,
};

switch (thing.color) {
  case Color.Red: // ...
  case Color.White: // ...
}

小js-hack但工作:e[字符串(e.hello)]

我只是声明了一个接口，并使用该类型的变量访问枚举。保持接口和枚举同步实际上很容易，因为如果枚举中有什么变化，TypeScript会报错，就像这样。

typeof EAbFlagEnum类型的参数不可赋值 参数类型为“IAbFlagEnum”。属性“Move”类型缺失 “typeof EAbFlagEnum”。

这种方法的优点是在各种情况下使用enum(接口)不需要类型强制转换，因此支持更多类型的情况，例如switch/case。

// Declare a TypeScript enum using unique string 
//  (per hack mentioned by zjc0816)

enum EAbFlagEnum {
  None      = <any> "none",
  Select    = <any> "sel",
  Move      = <any> "mov",
  Edit      = <any> "edit",
  Sort      = <any> "sort",
  Clone     = <any> "clone"
}

// Create an interface that shadows the enum
//   and asserts that members are a type of any

interface IAbFlagEnum {
    None:   any;
    Select: any;
    Move:   any;
    Edit:   any;
    Sort:   any;
    Clone:  any;
}

// Export a variable of type interface that points to the enum

export var AbFlagEnum: IAbFlagEnum = EAbFlagEnum;

使用变量，而不是枚举，可以产生所需的结果。

var strVal: string = AbFlagEnum.Edit;

switch (strVal) {
  case AbFlagEnum.Edit:
    break;
  case AbFlagEnum.Move:
    break;
  case AbFlagEnum.Clone
}

标记是我的另一个需要，所以我创建了一个NPM模块，添加到这个例子中，并包括测试。

https://github.com/djabraham/ts-enum-tools

最近在使用TypeScript 1.0.1时遇到了这个问题，并以这种方式解决了:

enum IEvents {
        /** A click on a product or product link for one or more products. */
        CLICK,
        /** A view of product details. */
        DETAIL,
        /** Adding one or more products to a shopping cart. */
        ADD,
        /** Remove one or more products from a shopping cart. */
        REMOVE,
        /** Initiating the checkout process for one or more products. */
        CHECKOUT,
        /** Sending the option value for a given checkout step. */
        CHECKOUT_OPTION,
        /** The sale of one or more products. */
        PURCHASE,
        /** The refund of one or more products. */
        REFUND,
        /** A click on an internal promotion. */
        PROMO_CLICK
}

var Events = [
        'click',
        'detail',
        'add',
        'remove',
        'checkout',
        'checkout_option',
        'purchase',
        'refund',
        'promo_click'
];

function stuff(event: IEvents):boolean {
        // event can now be only IEvents constants
        Events[event]; // event is actually a number that matches the index of the array
}
// stuff('click') won't work, it needs to be called using stuff(IEvents.CLICK)

//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]);
}