开发笔记:如何在打字稿中访问枚举的名称

我使用的库有一个如下所示的emum：

/** Defines values that represent the status of a request to purchase an app or add-on. */
enum StorePurchaseStatus {
/** The current user has already purchased the specified app or add-on. */
alreadyPurchased = 1,
/** The purchase request did not succeed because of a network connectivity error. */
networkError = 3,
/** The purchase request did not succeed. */
notPurchased = 2,
/** The purchase request did not succeed because of a server error returned by the Windows Store. */
serverError = 4,
/** The purchase request succeeded. */
succeeded = 0,
}


我有数字值，我想打印名称（例如，我的状态为1，并希望打印'已购买'）。

但是，当我做这样的事情时：

StorePurchaseStatus[1]


我最终得到了undefined。如果我只有值，我该如何访问字符串名称？