鏈接xml文檔

Question

我是xml，xquery和xpath的初學者。根據它們之間的定義關係，可以將兩個單獨的xml文檔鏈接在一起嗎？例如，如果我有一個包含在線零售系統的所有客戶，像這樣（縮短例子）的XML文檔：

<customers> 
<customer loyaltyPoints = "20" sex = "male"> 
    <customerID>1092</customerID> 
    <first_name>James</first_name> 
    <second_name>Roland</second_name> 
    <email_address>jroland@eircom.net</email_address> 
    <DOB> 
     <day>07</day> 
     <month>05</month> 
     <year>1970</year>  
    </DOB> 
    <orderlist> 
     <order>[LINK TO ORDER FROM ORDERS.XML]</order> 
    </orderlist> 
</customer> 

，幷包含一系列像這樣的訂單的第二個XML文件：

<orders> 
<order numberOfItems = "2"> 
    <orderID>384523</orderID> 
    <items> 
     <item>[LINK TO PRODUCT X IN PRODUCTS.XML]</item> 
     <item>[LINK TO PRODUCT Y IN PRODUCTS.XML]</item> 
    </items> 
</order> 
</orders> 

我可以將客戶鏈接到其他文檔中的訂單，反之亦然？非常感謝

Answer 1

如果你使用你有ID's作爲鏈接，你可以做以下鍵：

XmlDocument customerDoc = new XmlDocument(); 
customerDoc.LoadXml("<customers> 
         <customer loyaltyPoints = \"20\" sex = \"male\"> 
         <customerID>1092</customerID> 
         <first_name>James</first_name> 
         <second_name>Roland</second_name> 
         <email_address>jroland@eircom.net</email_address> 
         <DOB> 
          <day>07</day> 
          <month>05</month> 
          <year>1970</year> 
         </DOB> 
         <orderlist> 
          <order>384523</order> 
         </orderlist> 
         </customer> 
        </customers>"); 

XmlDocument ordersDoc = new XmlDocument(); 
ordersDoc.LoadXml("<orders> 
         <order numberOfItems = \"2\"> 
          <orderID>384523</orderID> 
          <items> 
           <item>[LINK TO PRODUCT X IN PRODUCTS.XML]</item> 
           <item>[LINK TO PRODUCT Y IN PRODUCTS.XML]</item> 
          </items> 
         </order> 
        </orders>"); 

// Select all "customer" nodes 
XmlNodeList nodes = customerDoc.SelectNodes("customers/customer"); 

foreach (XmlNode node in nodes) 
{ 
    XmlNodeList orderList = node.SelectNodes("orderlist"); 
    foreach (XmlNode orderNode in orderList) 
    { 
      string orderId = orderNode.InnerText; 
      XmlNode orderInOrderDocNode = ordersDoc.SelectSingleNode("orders/order[orderID='" + orderId + "']"); 
      Console.WriteLine(orderInOrderDocNode.InnerText); 
      } 
     } 

這將打印出被賦予的orders.xml中文檔中出現的順序節點orderId在客戶文檔中。

希望這是你正在尋找。