c# - MWS fba api错误请求c#

Question

嗨，我正在测试 MarketplaceWebService.Samples。但它总是响应错误的请求。无效的请求。谁能帮忙看看。谢谢。

SubmitFeedRequest request = new SubmitFeedRequest();
            request.Merchant = merchantId;
            request.MWSAuthToken = "<Your MWS Auth Token>"; // Optional
            request.MarketplaceIdList = new IdList();
            request.MarketplaceIdList.Id = new List<string>(new string[] { marketplaceId });



            request.FeedContent = File.Open("feed.xml", FileMode.Open, FileAccess.Read);


            request.ContentMD5 = MarketplaceWebServiceClient.CalculateContentMD5(request.FeedContent);
            request.FeedContent.Position = 0;

            request.FeedType = "_POST_PRODUCT_DATA_";

            SubmitFeedSample.InvokeSubmitFeed(service, request);

feed.xml 1.01 machantid 产品 false 1 更新测试库 UPC 123456789