c# - 内购成功后正确步骤

Question

我尝试使用以下代码进行应用内购买。我正在使用 CurrentAppSimulator 进行测试。

private async void history_Click(object sender, RoutedEventArgs e)
{
    bool OK = true;

    // Get the license info
    // The next line is commented out for testing.
    // licenseInformation = CurrentApp.LicenseInformation;

    // The next line is commented out for production/release.       
    LicenseInformation licenseInformation = CurrentAppSimulator.LicenseInformation;
    if (!licenseInformation.ProductLicenses["PremiumFeatures"].IsActive)
    {
        try
        {
            // The customer doesn't own this feature, so 
            // show the purchase dialog.

            await CurrentAppSimulator.RequestProductPurchaseAsync("PremiumFeatures", false);
            // the in-app purchase was successful
            OK = true;
        }
        catch (Exception)
        {
            // The in-app purchase was not completed because 
            // an error occurred.
            OK = false;
        }
    }
    else
    {
        // The customer already owns this feature.
        OK = true;
    }

    if (OK)
    {
        Frame.Navigate(typeof(HistoryPage));
    }
}

但是，每次我执行history_Click 时，对话框一直弹出，即使我选择了 S_OK。我希望在购买 PremiumFeatures 之后，licenseInformation.ProductLicenses["PremiumFeatures"].IsActive 应该更改为 true。

我想，也许当应用内购买成功时，我需要打开 IsActive 标志，这样它就不会再显示购买对话框了。

        // the in-app purchase was successful
        OK = true;
        // Compile error!!!
        licenseInformation.ProductLicenses["PremiumFeatures"].IsActive = true;

好的。似乎 IsActive 是一个只读字段。那么，请问购买成功案例的正确处理方式是什么？

更新:

看了Trial app and in-app purchase sample之后，我意识到在购买成功后，具有以下代码可以将 IsActive 从 false 更改为 true 自动。 (但它为什么有效？)

    private async Task LoadInAppPurchaseProxyFileAsync()
    {
        StorageFolder proxyDataFolder = await Package.Current.InstalledLocation.GetFolderAsync("data");
        StorageFile proxyFile = await proxyDataFolder.GetFileAsync("in-app-purchase.xml");
        licenseChangeHandler = new LicenseChangedEventHandler(InAppPurchaseRefreshScenario);
        CurrentAppSimulator.LicenseInformation.LicenseChanged += licenseChangeHandler;
        await CurrentAppSimulator.ReloadSimulatorAsync(proxyFile);

        // setup application upsell message
        ListingInformation listing = await CurrentAppSimulator.LoadListingInformationAsync();
        var product1 = listing.ProductListings["product1"];
        var product2 = listing.ProductListings["product2"];
        Product1SellMessage.Text = "You can buy " + product1.Name + " for: " + product1.FormattedPrice + ".";
        Product2SellMessage.Text = "You can buy " + product2.Name + " for: " + product2.FormattedPrice + ".";
    }

但是，“已购买”状态不是持久性。如果我关闭应用程序并重新启动它，它会认为我的“高级功能”为“尚未购买”。

我认为如何使这种行为持久化？

Answer 1

请阅读

根据您的经验，我假设 App.IsTrial 设置为 true。当应用程序处于试用模式或(出于任何其他原因)未激活时，您无法进行购买。请注意，我指的是应用程序而不是功能/产品。一旦应用程序激活，您的购买就会成功。