xml - VBA Excel SelectSingleNode 语法

Question

我使用以下代码来获取 xml 中“DistanceUnit”元素的值:

Dim xmlDoc As MSXML2.DOMDocument60
Dim xmlElement As MSXML2.IXMLDOMElement

Set xmlDoc = New MSXML2.DOMDocument60
xmlDoc.async = False
xmlDoc.validateOnParse = False

xmlDoc.LoadXML strResponse
Set xmlElement = xmlDoc.DocumentElement

Set curNode = xmlElement.SelectSingleNode("/Response/ResourceSets/ResourceSet/Resources/Route/DistanceUnit")

调试时我发现 curNode 是什么都没有。我不明白为什么。 当我使用迭代代码时，它似乎工作正常:

Set xmlRoot = xmlDoc.DocumentElement
Set xmlChildren = xmlRoot.ChildNodes

For Each xmlTemplate In xmlChildren
    If xmlTemplate.nodeName = "ResourceSets" Then
        MsgBox "found!"
        Exit For
    End If
Next xmlTemplate

我不想使用迭代代码，因为我知道元素的确切 xpath...

这段代码也可以工作，但我只想使用 xpath:

Set curNode = xmlRoot.ChildNodes(6).ChildNodes(0).ChildNodes(1).ChildNodes(0).ChildNodes(2)
MsgBox curNode.Text

谢谢， 李

我的 XML:

<Response xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://schemas.microsoft.com/search/local/ws/rest/v1">
    ....
    <StatusCode>200</StatusCode>
    <StatusDescription>OK</StatusDescription>
    <AuthenticationResultCode>ValidCredentials</AuthenticationResultCode>
    <ResourceSets>
        <ResourceSet>
            <EstimatedTotal>1</EstimatedTotal>
            <Resources>
                <Route>
                    .....
                    <DistanceUnit>Kilometer</DistanceUnit>
                    .....
                </Route>
            </Resources>
        </ResourceSet>
    </ResourceSets>
</Response>

Answer 1

尝试为默认命名空间声明指定命名空间前缀(有关详细信息，请参阅 this KB article):

Set xmlDoc = New MSXML2.DOMDocument60
xmlDoc.async = False
xmlDoc.validateOnParse = False

 xmlDoc.setProperty "SelectionNamespaces", "xmlns:a='http://schemas.microsoft.com/search/local/ws/rest/v1'"

xmlDoc.LoadXML strResponse
Set xmlElement = xmlDoc.DocumentElement

Set curNode = xmlElement.SelectSingleNode("/a:Response/a:ResourceSets/a:ResourceSet/a:Resources/a:Route/a:DistanceUnit")