c# - 具有初始金额的定期 paypal 付款的空引用

Question

我正在尝试创建定期付款资料。我能够成功创建订阅。现在我想创建首付款订阅。我添加了以下代码:

    CurrencyCodeType currency = (CurrencyCodeType)Enum.Parse(typeof(CurrencyCodeType), "USD");
    BasicAmountType intialPaymentAmount = new BasicAmountType(currency, "4000");
    scheduleDetails.ActivationDetails.InitialAmount = intialPaymentAmount;

但是上面这段代码抛出空引用对象错误。

这确实给我带来了错误:

scheduleDetails.ActivationDetails.InitialAmount = intialPaymentAmount;

但在 Debug模式下，intialPaymentAmount 中包含所有内容。

我做错了什么？

Answer 1

这样我就解决了问题

        BasicAmountType intialPaymentAmount = new BasicAmountType(currency, "4000");
        ActivationDetailsType acd = new ActivationDetailsType();
        acd.InitialAmount = intialPaymentAmount;
        acd.FailedInitialAmountAction = FailedPaymentActionType.CANCELONFAILURE;
        scheduleDetails.ActivationDetails = acd;