c# - Xamarin.Auth AccountStore 不删除值？

Question

每当我调用我的方法从 Xamarin 中的 AccountStore 中删除某些内容时，它都会删除它并说该列表中少了一件东西。下面的方法首先从依赖服务调用。

public void DeleteSecureValue(string appName, string key)
{
    var account = AccountStore.Create().FindAccountsForService(appName).FirstOrDefault();
    if (account.Properties.ContainsKey(key))
        account.Properties.Remove(key);

    var props = account.Properties;
    // when debugging, props doesn't contain a value for passcode
}

---

Xamarin.Forms.DependencyService.Get<IStorageHandler>().DeleteSecureValue(GlobalConstants.APP_NAME, "passcode");

var account = AccountStore.Create().FindAccountsForService(GlobalConstants.APP_NAME).FirstOrDefault();
var props = account.Properties;
// when debugging, props now has a value for passcode when it shouldn't

为什么 passcode 的值似乎又回来了？

Answer 1

您只是在 DeleteSecureValue 中操作内存中的字典。您必须将更改写回您的存储。

public void DeleteSecureValue(string appName, string key)
{
    var store = AccountStore.Create();
    var account = AccountStore.Create().FindAccountsForService(appName).FirstOrDefault();
    if (account.Properties.ContainsKey(key))
    {
        account.Properties.Remove(key);
        store.Save(account, appName);
    }
}