XPath失敗，MSXML2

Question

我使用VBA解析MSXML2和XPath的soap xml，但XPath查詢在各種工具中工作時不會在selectNodes方法中選擇任何內容。從我迄今爲止所看到的衆多問題中所收集的內容中，我可以使用這種「本地名稱」語法，而不是指定命名空間，但沒有任何選擇。我究竟做錯了什麼？

private const DQ = """" 
Public Sub parseXML(sFileName As String) 
Dim xmldoc As New MSXML2.DOMDocument60, I As IXMLDOMNodeList, x As IXMLDOMNode 

With xmldoc 
    .loadXML sFileName 
    .SetProperty "SelectionLanguage", "XPath" 
    Set I = .selectNodes("//*[local-name()=" & DQ & "item" & DQ & "]") 
    If I.length > 0 Then 
    ' do something useful 
    end if 
End With 
End Sub 


<soap-env:Envelope xmlns:soap-env="http://schemas.xmlsoap.org/soap/envelope/"> 
<soap-env:Header></soap-env:Header> 
<soap-env:Body> 
    <n0:ZBexQaasResponse xmlns:n0="urn:sap-com:document:sap:soap:functions:mc-style"> 
    <Messages> 
    <item> 
     // some elements 
    </item> 
    </Messages> 
    <OutputTable> 
    <item> 
    // some elements 
    </item> 
    </OutputTable> 
    <TextElements></TextElements> 
    <XmlOutput></XmlOutput> 
    <XmlTxtelem></XmlTxtelem> 
    </n0:ZBexQaasResponse> 
</soap-env:Body> 
</soap-env:Envelope> 

Answer 1

我不明白爲什麼代碼（與load而不是loadXML和必要async設置，因爲已經在評論建議）不應該工作，我不能重現該問題，當我有文件test2012011901.xml爲

<soap-env:Envelope xmlns:soap-env="http://schemas.xmlsoap.org/soap/envelope/"> 
<soap-env:Header></soap-env:Header> 
<soap-env:Body> 
    <n0:ZBexQaasResponse xmlns:n0="urn:sap-com:document:sap:soap:functions:mc-style"> 
    <Messages> 
    <item> 
     // some elements 
    </item> 
    </Messages> 
    <OutputTable> 
    <item> 
    // some elements 
    </item> 
    </OutputTable> 
    <TextElements></TextElements> 
    <XmlOutput></XmlOutput> 
    <XmlTxtelem></XmlTxtelem> 
    </n0:ZBexQaasResponse> 
</soap-env:Body> 
</soap-env:Envelope> 

和VBScript代碼

Dim doc, items 
Set doc = CreateObject("Msxml2.DOMDocument.6.0") 
doc.async = False 
If doc.load("test2012011901.xml") Then 
    Set items = doc.selectNodes("//item") 
    WScript.Echo "Found " & items.length & " element(s)." 
    For Each item In items 
    WScript.Echo item.xml 
    Next 
    Set items = doc.selectNodes("//*[local-name() = 'item']") 
    WScript.Echo "Found " & items.length & " element(s)." 
    For Each item In items 
    WScript.Echo item.xml 
    Next 
Else 
    WScript.Echo "Parse error " & doc.parseError.reason 
End If 

那麼這兩個XPath表達式找到兩個item種元素，作爲輸出顯示：

Found 2 element(s). 
<item> 
     // some elements 
    </item> 
<item> 
    // some elements 
    </item> 
Found 2 element(s). 
<item> 
     // some elements 
    </item> 
<item> 
    // some elements 
    </item> 

所以，據我可以告訴我的建議，評論應該解決您的問題，您需要詳細說明，如果你仍然有問題。