使用XPath提取特定节点的值

我正面临着使用XPath从XML中的特定节点提取值的问题。我想要做的是从一个节点获取基于其他节点中的值的值。所以当我查询XML时，另一个节点中的值是一个条件。使用XPath提取特定节点的值

下面是C＃我的XPath代码：

我可以拉使用节点的位置的值。

String webURL3; 
      WebRequest YRCRateQuote; 
      WebResponse resp3; 
      Stream respStream3; 
      XmlDocument rateQuote3 = new XmlDocument(); 
      XmlNode freightChargeSP1; 
      XmlNode freightChargeSP2; 
      XmlNode freightChargeSP3; 
      XmlNode freightChargeSP4; 
      XmlNode freightChargeSP5; 
      XmlNode freightChargeSP6; 
      XmlNode freightChargeSP7; 
      XmlNode serviceDaysSP; 


      //build web request 
      webURL3 = String.Format(web service string); 

      //create web request 
      YRCRateQuote = WebRequest.Create(webURL3); 

      //make web service call 
      resp3 = YRCRateQuote.GetResponse(); 

      //read response 
      respStream3 = resp3.GetResponseStream(); 
      rateQuote3.Load(respStream3); 

      //Use Name Space 
      XmlNamespaceManager nsmgr = new XmlNamespaceManager(rateQuote3.NameTable); 
      nsmgr.AddNamespace("rq", "http://ratequote.usfnet.usfc.com/v2/x1"); 

//This works get the value of the first TOTAL_COST node 
freightChargeSP2 = rateQuote3.SelectSingleNode("//rq:SERVICEUPGRADES[1]//rq:TOTAL_COST", nsmgr); 

//But this one gives me null if I want to pull the value depending upon value in the other node 
freightChargeSP1 = rateQuote3.SelectSingleNode("//rq:SERVICEUPGRADES[SERVICE_TYPE='regional delivery']//rq:TOTAL_COST", nsmgr); 

//I also tried doing this 
freightChargeSP1 = rateQuote3.SelectSingleNode("//rq:SERVICEUPGRADES//rq:TOTAL_COST[SERVICE_TYPE='regional delivery']", nsmgr);

改变/ /没有帮助它。

这里的XML：

<?xml version="1.0"?> 
<RateQuoteResponse xmlns="http://ratequote.usfnet.usfc.com/v2/x1"> 
    <STATUS> 
    <CODE>0</CODE> 
    <VIEW>SECURED</VIEW> 
    <VERSION> 
     <CURRENT>V2X1</CURRENT> 
     <CURRENT_RELEASE_DATE>02/06/2010</CURRENT_RELEASE_DATE> 
     <LATEST>V2X1</LATEST><LATEST_RELEASE_DATE>02/06/2010</LATEST_RELEASE_DATE> 
    </VERSION></STATUS> 
    <RateQuote> 
    <ORIGIN> 
     <NAME>INDIANAPOLIS</NAME> 
     <CARRIER>USF Holland, Inc</CARRIER> 
     <ADDRESS>2530 S TIBBS AVE</ADDRESS> 
     <CITY>INDIANAPOLIS</CITY> 
     <STATE>IN</STATE> 
     <ZIP>46241</ZIP> 
     <PHONE>3172277627</PHONE> 
     <PHONE_TOLLFREE>8006274831</PHONE_TOLLFREE> 
     <FAX>3172277629</FAX> 
    </ORIGIN> 
    <DESTINATION> 
     <NAME>INDIANAPOLIS</NAME> 
     <CARRIER>USF Holland, Inc</CARRIER> 
     <ADDRESS>2530 S TIBBS AVE</ADDRESS> 
     <CITY>INDIANAPOLIS</CITY> 
     <STATE>IN</STATE> 
     <ZIP>46241</ZIP> 
     <PHONE>3172277627</PHONE> 
     <PHONE_TOLLFREE>8006274831</PHONE_TOLLFREE> 
     <FAX>3172277629</FAX> 
    </DESTINATION> 
    <ORIGIN_ZIP>46202</ORIGIN_ZIP> 
    <DESTINATION_ZIP>46204</DESTINATION_ZIP> 
    <TOTAL_COST>117.02</TOTAL_COST> 
    <DISCOUNTPERCENTAGE>85.0</DISCOUNTPERCENTAGE> 
    <DISCOUNTAMOUNT>512.04</DISCOUNTAMOUNT> 
    <SERVICEDAYS>1</SERVICEDAYS> 
    <INDUSTRYDAYS>1.5</INDUSTRYDAYS> 
    <CLASSWEIGHT> 
     <CLASS>60</CLASS> 
     <ASCLASS>60</ASCLASS> 
     <WEIGHT>1500</WEIGHT> 
     <CHARGES>602.4</CHARGES> 
    </CLASSWEIGHT> 
    <ADDIONALCHARGES> 
     <RATE>Fuel Surcharge</RATE> 
     <CHARGES>26.66</CHARGES> 
     <DESCRIPTION>FSC29.50% ON DIESEL OF 386.7</DESCRIPTION> 
    </ADDIONALCHARGES> 
    <SERVICEUPGRADES> 
     <DELIVERYDAYS>Please Call Customer Service for Available Days and Times</DELIVERYDAYS> 
     <DELIVERYTIME>Single-hour Window</DELIVERYTIME> 
     <SERVICE_TYPE>guaranteed window</SERVICE_TYPE> 
     <TOTAL_COST>267.02</TOTAL_COST> 
    </SERVICEUPGRADES> 
    <SERVICEUPGRADES> 
     <DELIVERYDAYS>Please Call Customer Service for Available Days and Times</DELIVERYDAYS> 
     <DELIVERYTIME>Multi-hour Window</DELIVERYTIME> 
     <SERVICE_TYPE>guaranteed window</SERVICE_TYPE> 
     <TOTAL_COST>267.02</TOTAL_COST> 
    </SERVICEUPGRADES> 
    <SERVICEUPGRADES> 
     <DELIVERYDAYS>Please Call Customer Service for Available Days and Times</DELIVERYDAYS> 
     <DELIVERYTIME>Single or Multi Day Window</DELIVERYTIME> 
     <SERVICE_TYPE>guaranteed window</SERVICE_TYPE> 
     <TOTAL_COST>152.02</TOTAL_COST> 
    </SERVICEUPGRADES> 
    <SERVICEUPGRADES> 
     <DELIVERYDATE>07/17/2013</DELIVERYDATE> 
     <DELIVERYDAYS>1</DELIVERYDAYS> 
     <DELIVERYTIME>before 9:00 AM</DELIVERYTIME> 
     <SERVICE_TYPE>guaranteed delivery</SERVICE_TYPE> 
     <TOTAL_COST>217.02</TOTAL_COST> 
    </SERVICEUPGRADES> 
    <SERVICEUPGRADES> 
     <DELIVERYDATE>07/17/2013</DELIVERYDATE> 
     <DELIVERYDAYS>1</DELIVERYDAYS> 
     <DELIVERYTIME>before 12:00 PM (noon)</DELIVERYTIME> 
     <SERVICE_TYPE>guaranteed delivery</SERVICE_TYPE> 
     <TOTAL_COST>182.02</TOTAL_COST> 
    </SERVICEUPGRADES> 
    <SERVICEUPGRADES> 
     <DELIVERYDATE>07/17/2013</DELIVERYDATE> 
     <DELIVERYDAYS>1</DELIVERYDAYS> 
     <DELIVERYTIME>before 3:30 PM</DELIVERYTIME> 
     <SERVICE_TYPE>guaranteed delivery</SERVICE_TYPE> 
     <TOTAL_COST>152.02</TOTAL_COST> 
    </SERVICEUPGRADES> 
    <SERVICEUPGRADES> 
     <DELIVERYDATE>07/17/2013</DELIVERYDATE> 
     <DELIVERYDAYS>1</DELIVERYDAYS> 
     <SERVICE_TYPE>regional delivery</SERVICE_TYPE> 
     <TOTAL_COST>117.02</TOTAL_COST> 
    </SERVICEUPGRADES> 
    </RateQuote> 
</RateQuoteResponse>

来源

2013-07-18 user2574121

......但你究竟想要做什么（用简单的英语）？ – spender

我试图根据其他节点中的值在节点中获取值。 – user2574121

与LinqToXml相当容易，因为显式类型转换操作符让你的所有类型转换容易：

XNamespace ns="http://ratequote.usfnet.usfc.com/v2/x1"; 
var doc = XDocument.Parse(xml); //or whatever 
var costNode = doc 
    .Root 
    .Descendants(ns + "SERVICEUPGRADES") 
    .Single(e => (string)e.Element(ns + "SERVICE_TYPE") == "regional delivery") 
    .Element(ns + "TOTAL_COST"); 
var cost = (decimal)costNode;

来源

2013-07-18 00:47:04 spender

尝试添加命名空间也SERVICE_TYPE：

"//rq:SERVICEUPGRADES[rq:SERVICE_TYPE='regional delivery']//rq:TOTAL_COST"

来源

2013-07-18 00:40:20 fcuesta

使用XPath提取特定节点的值

回答

相关问题