【问题】
C#，AWS
对于某个item，想要获得所有的卖家，即offers，所以知道要去用
但是在得到了卖家的总体个数后，想要分别获得每个卖家的信息。主要是卖家的名字和价格。
价格是从返回信息中就有了：
<Offer>
<OfferAttributes>
<Condition>New</Condition>
</OfferAttributes>
<OfferListing>
<OfferListingId>ErBLas%2B7TSZ%2BZ%2BiFVOa5ylIp1VH8lz%2BiQ%2FsnhfzHRulMaCZLKoeZHJd%2B1TFz3IDbtjsZcDmYV11DKEmqd5i3ArRZ8D%2FBCVblaq4SYOZrc1Y%3D</OfferListingId>
<Price>
<Amount>10199</Amount>
<CurrencyCode>USD</CurrencyCode>
<FormattedPrice>$101.99</FormattedPrice>
</Price>
<AmountSaved>
<Amount>2101</Amount>
<CurrencyCode>USD</CurrencyCode>
<FormattedPrice>$21.01</FormattedPrice>
</AmountSaved>
<PercentageSaved>17</PercentageSaved>
<Availability>Usually ships in 24 hours</Availability>
<AvailabilityAttributes>
<AvailabilityType>now</AvailabilityType>
<MinimumHours>0</MinimumHours>
<MaximumHours>0</MaximumHours>
</AvailabilityAttributes>
<IsEligibleForSuperSaverShipping>1</IsEligibleForSuperSaverShipping>
</OfferListing>
</Offer>但是卖家的名字，即Merchant的name，却没找到。
【解决过程】
1。之前自己就想到了，是不是通过Merchant的id，再去利用OfferFull，去获得对应的Merchant的name。
但是不确定。
2.参考：
提到的：
How to get Seller Name from Amazon in ItemSearch using amazon API
果然是：
http://ecs.amazonaws.com/onca/xml? Service=AWSECommerceService& AWSAccessKeyId=[AWS Access Key ID]& Operation=ItemLookup& ItemId=B00008OE6I& ResponseGroup=OfferFull& <- important MerchantId=All& <- important Condition=All& <- important &Timestamp=[YYYY-MM-DDThh:mm:ssZ] &Signature=[Request Signature]
得到对应的结果：
<Items>
...
<Item>
...
<Offers>
<TotalOffers>148</TotalOffers>
<TotalOfferPages>15</TotalOfferPages>
<Offer>
<Merchant>
<MerchantId>[Merchant Id]</MerchantId>
<Name>[Merchant Name]</Name>
...
</Merchant>
...
</Offer>
...所以自己也去试试，
后来是可以得到的merchant的name的，但是由于api更新：
而取消了MerchantId了，所以无法再得到MerchantId了。
【总结】
最后，是用代码：
/*
* [Function]
* get item offer full info
* [Input]
* single asin
* eg:
* B003F4TH6G
*
* [Output]
* offer full response info
*
* [Note]
*/
public awsOfferFullInfo awsGetOfferFullInfo(string itemAsin, int itemPage = 1)
{
awsOfferFullInfo offerFullInfo = new awsOfferFullInfo();
IDictionary<string, string> reqDict = new Dictionary<string, String>();
reqDict["Service"] = "AWSECommerceService";
reqDict["Version"] = awsApiVersion;
reqDict["Operation"] = "ItemLookup";
reqDict["IdType"] = "ASIN";
reqDict["ItemId"] = itemAsin;
//http://docs.aws.amazon.com/AWSECommerceService/latest/DG/RG_OfferFull.html
reqDict["ResponseGroup"] = "OfferFull";
//https://affiliate-program.amazon.co.uk/gp/advertising/api/detail/api-changes.html?ie=UTF8&pf_rd_t=501&ref_=amb_link_83388313_2&pf_rd_m=A3P5ROKL5A1OLE&pf_rd_p=&pf_rd_s=assoc-center-1&pf_rd_r=&pf_rd_i=assoc-api-detail-2-v2
//reqDict["MerchantId"] = "All";
reqDict["Condition"] = "All";
reqDict["ItemPage"] = itemPage.ToString();
String awsReqUrl = Sign(reqDict);
XmlDocument xmlDocNoXmlns = awsReqUrlToXmlDoc_noXmlns(awsReqUrl);
XmlNode itemsNode = xmlDocNoXmlns.SelectSingleNode("/ItemLookupResponse/Items");
if (requestIsValid(itemsNode))
{
XmlNode itemNode = itemsNode.SelectSingleNode("./Item");
XmlNode asinNode = itemNode.SelectSingleNode("./ASIN");
offerFullInfo.Asin = asinNode.InnerText;
XmlNode offerSummaryNode = itemNode.SelectSingleNode("./OfferSummary");
if (offerSummaryNode != null)
{
//1. TotalNew
XmlNode totalNewNode = offerSummaryNode.SelectSingleNode("./TotalNew");
offerFullInfo.TotalNew = totalNewNode.InnerText; //"24"
//2. TotalUsed
XmlNode totalUsedNode = offerSummaryNode.SelectSingleNode("./TotalUsed");
offerFullInfo.TotalUsed = totalUsedNode.InnerText; //"1"
//3. TotalCollectible
XmlNode totalCollectibleNode = offerSummaryNode.SelectSingleNode("./TotalCollectible");
if (totalCollectibleNode != null)
{
offerFullInfo.TotalCollectible = totalCollectibleNode.InnerText; //"0"
}
//4. TotalRefurbished
XmlNode totalRefurbishedNode = offerSummaryNode.SelectSingleNode("./TotalRefurbished");
if (totalRefurbishedNode != null)
{
offerFullInfo.TotalRefurbished = totalRefurbishedNode.InnerText; //"0"
}
}
XmlNode offersNode = itemNode.SelectSingleNode("./Offers");
if (offersNode != null)
{
//5. TotalOffers
XmlNode totalOffersNode = offersNode.SelectSingleNode("./TotalOffers");
offerFullInfo.TotalOffers = totalOffersNode.InnerText; //"1"
//6. TotalOfferPages
XmlNode totalOfferPagesNode = offersNode.SelectSingleNode("./TotalOffers");
offerFullInfo.TotalOfferPages = totalOfferPagesNode.InnerText; //"1"
//7. process each Offer
XmlNodeList offerNodeList = offersNode.SelectNodes("./Offer");
if ((offerNodeList != null) && (offerNodeList.Count > 0))
{
offerFullInfo.offerList = new List<awsOffer>();
foreach (XmlNode offerNode in offerNodeList)
{
awsOffer singleOffer = new awsOffer();
//(1) Merchant
XmlNode merchantNode = offerNode.SelectSingleNode("./Merchant");
if (merchantNode != null)
{
//https://affiliate-program.amazon.co.uk/gp/advertising/api/detail/api-changes.html?ie=UTF8&pf_rd_t=501&ref_=amb_link_83388313_2&pf_rd_m=A3P5ROKL5A1OLE&pf_rd_p=&pf_rd_s=assoc-center-1&pf_rd_r=&pf_rd_i=assoc-api-detail-2-v2
//so now seems no MerchantId anymore
//XmlNode merchantIdNode = merchantNode.SelectSingleNode("./MerchantId");
//if (merchantIdNode != null)
//{
// singleOffer.MerchantId = merchantIdNode.InnerText;
//}
XmlNode merchantNameNode = merchantNode.SelectSingleNode("./Name");
if (merchantNameNode != null)
{
singleOffer.MerchantName = merchantNameNode.InnerText; //"B&G International"
}
offerFullInfo.offerList.Add(singleOffer);
}
}
}
else
{
gLogger.Debug(String.Format("not found Offer List for ASIN={0}", itemAsin));
}
}
else
{
gLogger.Debug(String.Format("not found Offers for ASIN={0}", itemAsin));
}
}
return offerFullInfo;
}得到了结果：
<Offers>
<TotalOffers>2</TotalOffers>
<TotalOfferPages>1</TotalOfferPages>
<MoreOffersUrl>http://www.amazon.com/gp/offer-listing/B003F4TH6G%3FSubscriptionId%3DAKIAJQAUAH2R4HCG63LQ%26tag%3Dcrifancom-20%26linkCode%3Dxm2%26camp%3D2025%26creative%3D386001%26creativeASIN%3DB003F4TH6G</MoreOffersUrl>
<Offer>
<Merchant>
<Name>B&G International</Name>
</Merchant>
<OfferAttributes>
<Condition>New</Condition>
</OfferAttributes>
<OfferListing>
<OfferListingId>5olWrpsQDrzXlfbNDsX0OYhUTAEFqR1BeoqsGzCm42qwupPs8OKTduttQUOZjnS%2FIy9LqtA4mSVnhzaEKp87lzTWTGB1WuZo%2FBBCo5l%2BdjoegXqhViwaYSU9%2FXFA45RCihHHtW6w3QbpKV54L%2FWITA%3D%3D</OfferListingId>
<Price>
<Amount>10999</Amount>
<CurrencyCode>USD</CurrencyCode>
<FormattedPrice>$109.99</FormattedPrice>
</Price>
<AmountSaved>
<Amount>3000</Amount>
<CurrencyCode>USD</CurrencyCode>
<FormattedPrice>$30.00</FormattedPrice>
</AmountSaved>
<PercentageSaved>21</PercentageSaved>
<Availability>Usually ships in 1-2 business days</Availability>
<AvailabilityAttributes>
<AvailabilityType>now</AvailabilityType>
<MinimumHours>24</MinimumHours>
<MaximumHours>48</MaximumHours>
</AvailabilityAttributes>
<IsEligibleForSuperSaverShipping>0</IsEligibleForSuperSaverShipping>
</OfferListing>
</Offer>
<Offer>
<Merchant>
<Name>Dean.Rowbot</Name>
</Merchant>
<OfferAttributes>
<Condition>Used</Condition>
</OfferAttributes>
<OfferListing>
<OfferListingId>f33GbR9lXeie8Cg6au6aj%2F8ENH72QGXlxPo1pvL4HSB2Ik%2ByeHhGzQHRAL9%2FAFDhDWcKqLULu1nbQWAS2uJvUYjQ4OLkkAHW%2BWS7oUYzuvDawNCJ0JLA6d1C1eDSxFuUevjRa%2FSQjRdWhKC%2BPmD5LQ%3D%3D</OfferListingId>
<Price>
<Amount>10000</Amount>
<CurrencyCode>USD</CurrencyCode>
<FormattedPrice>$100.00</FormattedPrice>
</Price>
<AmountSaved>
<Amount>3999</Amount>
<CurrencyCode>USD</CurrencyCode>
<FormattedPrice>$39.99</FormattedPrice>
</AmountSaved>
<PercentageSaved>29</PercentageSaved>
<Availability>Usually ships in 1-2 business days</Availability>
<AvailabilityAttributes>
<AvailabilityType>now</AvailabilityType>
<MinimumHours>24</MinimumHours>
<MaximumHours>48</MaximumHours>
</AvailabilityAttributes>
<IsEligibleForSuperSaverShipping>0</IsEligibleForSuperSaverShipping>
</OfferListing>
</Offer>
//</Offers>
结论是：
1.通过Condition=All，ResponseGroup=OfferFull，是可以获得对应的Merchant的Name的。
2.但是由于api更新：
导致取消了MerchantId，所以无法得到MerchantId。即使加了MerchantId=All，也是无效的。
转载请注明：在路上 » 【已解决】C#中如何通过AWS去获得Merchant的Id和name，即MerchantId和商家名字