C# 报告API的MWS GetReport函数是否返回空值？

我正在尝试提取FBA装运数据报告。我有一个正在运行的应用程序，它成功地从Amazon提取未发货的订单。所以基本上我把代码改成FBA发货单需要的代码。我几乎没有修改工作代码来获取报告，现在GetReport函数返回null，我不知道为什么。我正在传递一个来自Amazon系统的ReportId

如果有人能仔细阅读代码，看看我是否传入了空对象或其他东西

RequestReportRequest reportRequestRequest = new RequestReportRequest();
reportRequestRequest.Merchant = merchantId;
reportRequestRequest.Marketplace = marketplaceId;
reportRequestRequest.ReportType = "_GET_AMAZON_FULFILLED_SHIPMENTS_DATA_";
reportRequestRequest.StartDate = DateTime.Now.AddDays(-2);
reportRequestRequest.EndDate = DateTime.Now;

RequestReportResponse requestResponse = service.RequestReport(reportRequestRequest);
Thread.Sleep(15000);
Console.WriteLine(requestResponse.RequestReportResult.ReportRequestInfo.ReportProcessingStatus);
GetReportRequestListRequest reportRequestListRequest = new GetReportRequestListRequest();
reportRequestListRequest.Marketplace = marketplaceId;
reportRequestListRequest.Merchant = merchantId;
List<ReportRequestInfo> myListzz = new List<ReportRequestInfo>();

GetReportRequestListResponse reportRequestListResponse = new GetReportRequestListResponse();
reportRequestListResponse = service.GetReportRequestList(reportRequestListRequest);
GetReportRequestListResult reportRequestListResult = new GetReportRequestListResult();
reportRequestListResult = reportRequestListResponse.GetReportRequestListResult;
myListzz = reportRequestListResult.ReportRequestInfo;
while (myListzz[0].ReportProcessingStatus.ToString() != "_DONE_")
{
    Thread.Sleep(20000);
    reportRequestListResponse = service.GetReportRequestList(reportRequestListRequest);
    reportRequestListResult = reportRequestListResponse.GetReportRequestListResult;
    myListzz = reportRequestListResult.ReportRequestInfo;

}
GetReportListRequest listRequest = new GetReportListRequest();
listRequest.Merchant = merchantId;
listRequest.Marketplace = marketplaceId;
listRequest.ReportRequestIdList = new IdList();
listRequest.ReportRequestIdList.Id.Add(requestResponse.RequestReportResult.ReportRequestInfo.ReportRequestId);

GetReportListResponse listResponse = service.GetReportList(listRequest);


//MessageBox.Show(listResponse.GetReportListResult.ReportInfo.ToString());
GetReportListResult getReportListResult = listResponse.GetReportListResult;

GetReportRequest reportRequest = new GetReportRequest();
reportRequest.Merchant = merchantId;
reportRequest.Marketplace = marketplaceId;
reportRequest.WithReportId(getReportListResult.ReportInfo[0].ReportId);


GetReportResponse reportResponse = new GetReportResponse();

{
    reportResponse = service.GetReport(reportRequest); // <=== ERROR!!!!
}
catch (MarketplaceWebServiceException e)
{
    Console.WriteLine(e);
}
StreamReader sr = new StreamReader(reportRequest.Report);
Console.WriteLine(sr.ReadToEnd());
sr.Close();

RequestReportRequest=newrequestreportrequest（）；
reportRequestRequest.Merchant=merchantId；
reportRequestRequest.Marketplace=marketplaceId；
reportRequestRequest.ReportType=“\u获取\u亚马逊\u完成的货物\u数据”；
reportRequestRequest.StartDate=DateTime.Now.AddDays（-2）；
reportRequestRequest.EndDate=DateTime.Now；
RequestReportResponse=service.RequestReport（reportRequestRequest）；
睡眠（15000）；
WriteLine（requestResponse.RequestReportResult.ReportRequestInfo.ReportProcessingStatus）；
GetReportRequestListRequest reportRequestListRequest=新建GetReportRequestListRequest（）；
reportRequestListRequest.Marketplace=marketplaceId；
reportRequestListRequest.Merchant=merchantId；
List myListzz=新列表（）；
GetReportRequestListResponse reportRequestListResponse=新建GetReportRequestListResponse（）；
reportRequestListResponse=service.GetReportRequestList（reportRequestListRequest）；
GetReportRequestListResult reportRequestListResult=新建GetReportRequestListResult（）；
reportRequestListResult=reportRequestListResponse.GetReportRequestListResult；
myListzz=reportRequestListResult.ReportRequestInfo；
while（myListzz[0].ReportProcessingStatus.ToString（）！=“\u完成”）
{
睡眠（20000）；
reportRequestListResponse=service.GetReportRequestList（reportRequestListRequest）；
reportRequestListResult=reportRequestListResponse.GetReportRequestListResult；
myListzz=reportRequestListResult.ReportRequestInfo；
}
GetReportListRequest listRequest=新建GetReportListRequest（）；
listRequest.Merchant=merchantId；
listRequest.Marketplace=marketplaceId；
listRequest.ReportRequestIdList=新IdList（）；
listRequest.ReportRequestIdList.Id.Add（requestResponse.RequestReportResult.ReportRequestInfo.ReportRequestId）；
GetReportListResponse listResponse=service.GetReportList（listRequest）；
//Show（listResponse.GetReportListResult.ReportInfo.ToString（））；
GetReportListResult GetReportListResult=listResponse.GetReportListResult；
GetReportRequest reportRequest=新建GetReportRequest（）；
reportRequest.Merchant=merchantId；
reportRequest.Marketplace=marketplaceId；
reportRequest.WithReportId（getReportListResult.ReportInfo[0].ReportId）；
GetReportResponse reportResponse=新建GetReportResponse（）；
{
reportResponse=service.GetReport（reportRequest）；//在此行之后：

GetReportResponse reportResponse = new GetReportResponse(); 

您必须指定一个报告文件，如下所示：

reportRequest.Report = File.Open("C:\\AmazonReport.csv", FileMode.OpenOrCreate, FileAccess.ReadWrite);

然后，它会将报告写入该文件。
因此，您可以在那里看到您的报告。
谢谢，在java中遇到同样的问题后，这对我很有效