Question

我想知道如何获取Xml文件的nodepath。我贴在下面。所以我想创建一个方法，它将接受一个节点路径，并返回nodepath指向的元素的xml。

问题是我想要FormA1的xml，它位于元素Member下面（在Member / MemberName / BusinessNameLine1Txt下有Mouser0），我怎么能得到它，因为xml还有另一个Member元素（虽然有不同的BusinessNameLine1Txt = Mouser1）。

<ReturnState> 
 <ReturnDataState>      
    <Form6>
      <Header>
        <BusinessActivityCode>423690</BusinessActivityCode>
        <StateOfIncorporation>
          <State>DE</State>
          <YearOfIncorporation>2006</YearOfIncorporation>
        </StateOfIncorporation>
      </Header>
      <Body>
        <EstTaxPmtLessRefund>492823</EstTaxPmtLessRefund>
        <Overpayment>118450</Overpayment>
        <OverpaymentCreditedNxtYr>118450</OverpaymentCreditedNxtYr>
        <Reconciliation></Reconciliation>
        <SignatureArea></SignatureArea>
        <Member>                    
          <MemberName>
            <BusinessNameLine1Txt>Mouser0</BusinessNameLine1Txt>
          </MemberName>     
          <FormA1>
            <PartI-SalesFactor>
              <SalesDelOrShippedOutState>31754631</SalesDelOrShippedOutState>            
              <TotalSales>
                <Wisconsin>31754631</Wisconsin>
                <TotalCompany>1965873635</TotalCompany>
              </TotalSales>
              <SalesFactorTotal>
                <Wisconsin>31754631</Wisconsin>
                <TotalCompany>1965873635</TotalCompany>
              </SalesFactorTotal>
              <ApportionmentPercentage>0.000000</ApportionmentPercentage>
            </PartI-SalesFactor>
          </FormA1>
        </Member>
        <Member>                    
          <MemberName>
            <BusinessNameLine1Txt>Mouser1</BusinessNameLine1Txt>
          </MemberName>     
          <FormA1>
            <PartI-SalesFactor>
              <SalesDelOrShippedOutState>31754632</SalesDelOrShippedOutState>            
              <TotalSales>
                <Wisconsin>31754632</Wisconsin>
                <TotalCompany>1965873633</TotalCompany>
              </TotalSales>
              <SalesFactorTotal>
                <Wisconsin>31754632</Wisconsin>
                <TotalCompany>196587344</TotalCompany>
              </SalesFactorTotal>
              <ApportionmentPercentage>1.000000</ApportionmentPercentage>
            </PartI-SalesFactor>
          </FormA1>
        </Member>
      </Body>
    </Form6>
  </ReturnDataState>
</ReturnState>

所以，如果我将方法传递给路径，

ReturnState / ReturnDataState / Form6 / Body / Member / FormA1并希望它返回

  <FormA1>
    <PartI-SalesFactor>
        <SalesDelOrShippedOutState>31754631</SalesDelOrShippedOutState>
        <TotalSales>
            <Wisconsin>31754631</Wisconsin>
            <TotalCompany>1965873635</TotalCompany>
        </TotalSales>
        <SalesFactorTotal>
            <Wisconsin>31754631</Wisconsin>
            <TotalCompany>1965873635</TotalCompany>
        </SalesFactorTotal>
        <ApportionmentPercentage>0.000000</ApportionmentPercentage>
    </PartI-SalesFactor>
</FormA1>

而不是其他成员元素下的其他FormA1。我该怎么做？

非常感谢提前!!

AJ。

Answer 1

您可以使用这样的XPath查询：

var xElement = XElement.Parse(str); //or however you load your xml document
var formA1 = xElement.XPathSelectElement("ReturnDataState/Form6/Body/Member/FormA1");
Console.WriteLine(formA1.ToString());

因为我使用XPathSelectElement代替XPathSelectElements，所以您只会获得第一个匹配元素。如果您想根据其他条件选择结果，可以使用xpath的其他技巧，例如position()选择器。

Answer 2

.net有几种方法可以针对XML文档运行XPath，有一种方法在the other answer中被StriplingWarrior提到，所以我相信xpath是这里的方法。您可以使用XPath谓词（[...]）仅返回满足特定条件的元素。例如，您可以使用以下XPath表达式仅获取具有值等于Member的祖母BusinessNameLine1Txt的{{1}}元素：

"Mouser0"

话虽如此，获得此类Member[MemberName/BusinessNameLine1Txt='Mouser0']父级的FormA1元素的完整XPath表达式如下：

Member

<强> xpathtester.com demo

从Xml

2 个答案: