C# 在对象设置器中处理空对象

我试图使用一个很好的近对象设置器，但有空的问题

我现在的代码：

var Result = new RefundReplyObject
{
    AuthorisationNumber = reply.refundResponse.transactionDetails.authorisationNumber,
    ChargeValue = reply.refundResponse.transactionDetails.totalAmount.amount, 
    Message = reply.refundResponse.transactionDetails.message,
    ReconciliationReference = reply.refundResponse.transactionDetails.reconciliationReference,
    SettlementDate = reply.refundResponse.transactionDetails.settlementDate,
    Status = TransactionStatusToLocalModel(reply.refundResponse.transactionDetails.status),
    TransactionReference = reply.refundResponse.transactionDetails.transactionReference
};

但是……”“totalAmount”可能为空。所以，我得到了错误

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是否有一种简洁的方法来处理此问题，以便在“totalAmount”为空时，将chargevalue设置为零？

您可以这样做，例如：

ChargeValue = reply.refundResponse.transactionDetails.totalAmount != null ? reply.refundResponse.transactionDetails.totalAmount.amount : 0

像这样的

ChargeValue = (null == reply.refundResponse.transactionDetails.totalAmount) 
    ? 0
    : reply.refundResponse.transactionDetails.totalAmount.amount

---

三元运算符如何，它检查总量是否为空。如果不是，则使用它的

金额

，否则为0

ChargeValue = (reply.refundResponse.transactionDetails.totalAmount != null) ? reply.refundResponse.transactionDetails.totalAmount.amount : 0,

---

三元操作员来营救

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ChargeValue=总金额？合计金额：0
您将无法在设置器端执行此操作，因为在您到达设置器之前就发生了异常。通过执行以下操作，您可以获得您想要的（并在过程中彻底清理代码）：

var trans = reply.refundResponse.transactionDetails;

var Result = new RefundReplyObject
{
    AuthorisationNumber = trans.authorisationNumber,
    ChargeValue = trans.totalAmount == null ? 0 : trans.totalAmount.amount, 
    Message = trans.message,
    ReconciliationReference = trans.reconciliationReference,
    SettlementDate = trans.settlementDate,
    Status = TransactionStatusToLocalModeltrans.status),
    TransactionReference = trans.transactionReference
};