C＃Linq XML从具有相同名称的多个元素中获取文本

Question

我想检索产品信息并将其存储在我的集合IEnumerable中。但是，仅返回两种产品的信息。我尝试将代码从Element更改为Elements，但它只是引发了错误。

Orderlist.xml：

<?xml version="1.0" encoding="utf-8"?>
<ListOrderItemsResponse
    xmlns="https://mws.amazonservices.com/Orders/2013-09-01">
    <ListOrderItemsResult>
        <AmazonOrderId>002-1893166-3105064</AmazonOrderId>
        <OrderItems>
            <OrderItem>
                <ASIN>B00HUX1W1G</ASIN>
                <SellerSKU>NX-CHAG-UT0Q</SellerSKU>
                <OrderItemId>37783785306314</OrderItemId>
                <Title>Polyethylene Glycol (Peg) 200, ACS, Reagent Grade, One Quart Bottle</Title>
                <QuantityOrdered>1</QuantityOrdered>
                <QuantityShipped>0</QuantityShipped>
                <ItemPrice>
                    <CurrencyCode>USD</CurrencyCode>
                    <Amount>25.00</Amount>
                </ItemPrice>
                <ShippingPrice>
                    <CurrencyCode>USD</CurrencyCode>
                    <Amount>27.00</Amount>
                </ShippingPrice>
                <GiftWrapPrice>
                    <CurrencyCode>USD</CurrencyCode>
                    <Amount>0.00</Amount>
                </GiftWrapPrice>
                <ItemTax>
                    <CurrencyCode>USD</CurrencyCode>
                    <Amount>0.00</Amount>
                </ItemTax>
                <ShippingTax>
                    <CurrencyCode>USD</CurrencyCode>
                    <Amount>0.00</Amount>
                </ShippingTax>
                <GiftWrapTax>
                    <CurrencyCode>USD</CurrencyCode>
                    <Amount>0.00</Amount>
                </GiftWrapTax>
                <ShippingDiscount>
                    <CurrencyCode>USD</CurrencyCode>
                    <Amount>0.00</Amount>
                </ShippingDiscount>
                <PromotionDiscount>
                    <CurrencyCode>USD</CurrencyCode>
                    <Amount>0.00</Amount>
                </PromotionDiscount>
                <PromotionIds />
                <ConditionNote>Alliance Chemical</ConditionNote>
                <ConditionId>New</ConditionId>
                <ConditionSubtypeId>New</ConditionSubtypeId>
            </OrderItem>
        </OrderItems>
    </ListOrderItemsResult>
    <ListOrderItemsResult>
        <AmazonOrderId>102-5169016-4946643</AmazonOrderId>
        <OrderItems>
            <OrderItem>
                <ASIN>B00OKOU4GM</ASIN>
                <SellerSKU>35-9988-XJB8</SellerSKU>
                <OrderItemId>23504328079730</OrderItemId>
                <Title>Nitric Acid 65%, Acs, Reagent Grade, Quart(1 liter) Glass Bottle</Title>
                <QuantityOrdered>1</QuantityOrdered>
                <QuantityShipped>0</QuantityShipped>
                <ItemPrice>
                    <CurrencyCode>USD</CurrencyCode>
                    <Amount>48.00</Amount>
                </ItemPrice>
                <ShippingPrice>
                    <CurrencyCode>USD</CurrencyCode>
                    <Amount>27.00</Amount>
                </ShippingPrice>
                <GiftWrapPrice>
                    <CurrencyCode>USD</CurrencyCode>
                    <Amount>0.00</Amount>
                </GiftWrapPrice>
                <ItemTax>
                    <CurrencyCode>USD</CurrencyCode>
                    <Amount>0.00</Amount>
                </ItemTax>
                <ShippingTax>
                    <CurrencyCode>USD</CurrencyCode>
                    <Amount>0.00</Amount>
                </ShippingTax>
                <GiftWrapTax>
                    <CurrencyCode>USD</CurrencyCode>
                    <Amount>0.00</Amount>
                </GiftWrapTax>
                <ShippingDiscount>
                    <CurrencyCode>USD</CurrencyCode>
                    <Amount>0.00</Amount>
                </ShippingDiscount>
                <PromotionDiscount>
                    <CurrencyCode>USD</CurrencyCode>
                    <Amount>0.00</Amount>
                </PromotionDiscount>
                <PromotionIds />
                <ConditionId>New</ConditionId>
                <ConditionSubtypeId>New</ConditionSubtypeId>
            </OrderItem>
            <OrderItem>
                <ASIN>B00D6JGB2S</ASIN>
                <SellerSKU>DB-ZAYD-0QYZ</SellerSKU>
                <OrderItemId>58842277149658</OrderItemId>
                <Title>HYDROCHLORIC ACID 20 Be. Technical grade-One gallon bottle</Title>
                <QuantityOrdered>1</QuantityOrdered>
                <QuantityShipped>0</QuantityShipped>
                <ItemPrice>
                    <CurrencyCode>USD</CurrencyCode>
                    <Amount>35.00</Amount>
                </ItemPrice>
                <ShippingPrice>
                    <CurrencyCode>USD</CurrencyCode>
                    <Amount>27.00</Amount>
                </ShippingPrice>
                <GiftWrapPrice>
                    <CurrencyCode>USD</CurrencyCode>
                    <Amount>0.00</Amount>
                </GiftWrapPrice>
                <ItemTax>
                    <CurrencyCode>USD</CurrencyCode>
                    <Amount>0.00</Amount>
                </ItemTax>
                <ShippingTax>
                    <CurrencyCode>USD</CurrencyCode>
                    <Amount>0.00</Amount>
                </ShippingTax>
                <GiftWrapTax>
                    <CurrencyCode>USD</CurrencyCode>
                    <Amount>0.00</Amount>
                </GiftWrapTax>
                <ShippingDiscount>
                    <CurrencyCode>USD</CurrencyCode>
                    <Amount>0.00</Amount>
                </ShippingDiscount>
                <PromotionDiscount>
                    <CurrencyCode>USD</CurrencyCode>
                    <Amount>0.00</Amount>
                </PromotionDiscount>
                <PromotionIds />
                <ConditionId>New</ConditionId>
                <ConditionSubtypeId>New</ConditionSubtypeId>
            </OrderItem>
        </OrderItems>
    </ListOrderItemsResult>
    <ResponseMetadata>
        <RequestId>b4d81fad-7d09-4e07-b166-e5638292d56d</RequestId>
    </ResponseMetadata>
</ListOrderItemsResponse>  

主要代码

path = Path.Combine(Directory.GetCurrentDirectory(), "Orderlist.xml");
file = XDocument.Load(path);

xml = file.ToString();
doc = XDocument.Parse(xml);

var products = Products(doc);

private static IEnumerable<Address> Products(XContainer doc)
{
    XNamespace ns = "https://mws.amazonservices.com/Orders/2013-09-01";

    return from product in doc.Descendants(ns + "ListOrderItemsResult")
           select new Address
           {
               Title = (string)product.Element(ns + "OrderItems").Element(ns + "OrderItem").Element(ns + "Title"),  
               ItemPrice = (string)product.Element(ns + "OrderItems").Element(ns + "OrderItem").Element(ns + "ItemPrice").Element(ns + "Amount"),
               ShippingPrice = (string)product.Element(ns + "OrderItems").Element(ns + "OrderItem").Element(ns + "ShippingPrice").Element(ns + "Amount"),
               Quantity = (string)product.Element(ns + "OrderItems").Element(ns + "OrderItem").Element(ns + "QuantityOrdered"),
               P_OrderId = (string)product.Element(ns + "AmazonOrderId"),
           };
}


public class Address
{
    public string Name { get; set; }
    public string AddressLine1 { get; set; }
    public string AddressLine2 { get; set; }
    public string City { get; set; }
    public string State { get; set; }
    public string Title { get; set; }
    public string ItemPrice { get; set; }
    public string ShippingPrice { get; set; }
    public string Quantity { get; set; }
    public string P_OrderId { get; set; }
    public string S_OrderId { get; set; }
    public string PostalCode { get; set; }
}

Answer 1

xml中只有两个ListOrderItemsResult元素，因此您的方法应该只返回两个变量。

如果这不是问题，那么关于错误的更多信息就会很好。

Answer 2

按如下方式更改您的Products方法。

return from product in doc.Descendants(ns + "ListOrderItemsResult")
    from order in product.Element(ns + "OrderItems").Elements(ns + "OrderItem")
    select new Address
    {
       Title = (string)order.Element(ns + "Title"),
       ItemPrice = (string)order.Element(ns + "ItemPrice").Element(ns + "Amount"),
       ShippingPrice = (string)order.Element(ns + "ShippingPrice").Element(ns + "Amount"),
       Quantity = (string)order.Element(ns + "QuantityOrdered"),
       P_OrderId = (string)product.Element(ns + "AmazonOrderId"),
    };