c# - 如何使用 Stripe.NET 预览按比例分配？

Question

我正在按照 Previewing Proration 上的 Stripe 文档中提供的示例进行操作使用 Stripe.NET 库尝试查找当客户从计划 A 升级到计划 B 时将收取的金额。

但是，当我使用文档中的代码示例时，出现错误:

UpcomingInvoiceOptions options = new UpcomingInvoiceOptions()
{
    CustomerId = "cus_XXXXXXXXXXXXX",
    SubscriptionProrationDate = DateTime.UtcNow,
    SubscriptionItems = new List<InvoiceSubscriptionItemOptions>()
    {
        new InvoiceSubscriptionItemOptions()
        {
            Id = "si_XXXXXXXXXXXXXX", // Current Sub Item
            PlanId = "plan_XXXXXXXXXXXX" // New plan
        }
    }
};
InvoiceService service = new InvoiceService();
var result = service.Upcoming(options);

最后一行抛出一个Stripe.StripeException:没有订阅你不能更新订阅项。

Answer 1

事实证明，如果您不先调用 service.Get，则 options.SubscriptionId 是此操作的必填字段。

以下代码产生正确的结果:

UpcomingInvoiceOptions options = new UpcomingInvoiceOptions()
{
    CustomerId = "cus_XXXXXXXXXXXXX",
    SubscriptionId = "sub_XXXXXXXXXXXX",
    SubscriptionProrationDate = DateTime.UtcNow,
    SubscriptionItems = new List<InvoiceSubscriptionItemOptions>()
    {
        new InvoiceSubscriptionItemOptions()
        {
            Id = "si_XXXXXXXXXXXXXX", // Current Sub Item
            PlanId = "plan_XXXXXXXXXXXX" // New plan
        }
    }
};
InvoiceService service = new InvoiceService();
var result = service.Upcoming(options);