使用xpath last（）函數提取節點列表中的最後一個項目

Question

在Excel 2007中使用VBA，MS XML參考（v6.0）和xpath我試圖提取包含集合中最後一個節點的節點列表。該XML看起來是這樣的：

<Routes> 
    <Route id="RT1"> 
    <PrivateCode>PBAO902:3</PrivateCode> 
    <Description>City Centre, Corporation St - Hill Hook, Bishops Way</Description> 
    <RouteSectionRef>RS1</RouteSectionRef> 
    <RouteSectionRef>RS2</RouteSectionRef> 
    <RouteSectionRef>RS3</RouteSectionRef> 
    <RouteSectionRef>RS4</RouteSectionRef> 
    <RouteSectionRef>RS5</RouteSectionRef> 
    </Route> 
    <Route id="RT2"> 
    <PrivateCode>PBAO904:3</PrivateCode> 
    <Description>City Centre, Corporation St - Falcon Lodge, Churchill Parade</Description> 
    <RouteSectionRef>RS1</RouteSectionRef> 
    <RouteSectionRef>RS2</RouteSectionRef> 
    <RouteSectionRef>RS6</RouteSectionRef> 
    <RouteSectionRef>RS7</RouteSectionRef> 
    </Route> 
    <Route id="RT3"> 
    <PrivateCode>PBAO905:3</PrivateCode> 
    <Description>City Centre, Corporation St - Roughley, Slade Road</Description> 
    <RouteSectionRef>RS1</RouteSectionRef> 
    <RouteSectionRef>RS2</RouteSectionRef> 
    <RouteSectionRef>RS3</RouteSectionRef> 
    <RouteSectionRef>RS4</RouteSectionRef> 
    <RouteSectionRef>RS8</RouteSectionRef> 
    </Route> 
<Routes> 

我想提取，作爲一個節點列表，第一RouteSectionRef每條路線（RS1，RS1，RS1），並作爲一個獨立的節點列表中的最後RouteSectionRef每條路線（ RS5，RS7，RS8）。我可以用提取的第一個執行以下操作：

strPath = "//Routes/Route/RouteSectionRef[0]" 
Set dNL = dom.DocumentElement.SelectNodes(strPath) 
n = 0 
For Each dN In dNL 
    n = n + 1 
    arrRouteDescriptions(n, 2) = dN.Text 
Next dN 

我使用以下提取最後：

strPath = "//Routes/Route/RouteSectionRef[last()]" 
Set dNL = dom.DocumentElement.SelectNodes(strPath) 
n = 0 
For Each dN In dNL 
    n = n + 1 
    arrRouteDescriptions(n, 3) = dN.Text 
Next dN 

但收到以下運行時錯誤：

未知方法 // Routes/Route/RouteSectionRef [ - > last（）< - ]

任何人都可以指向正確的方向嗎？

Answer 1

聽起來好像您正在使用舊版本的MSXML，其默認選擇語言不是XPath 1.0。因此，成立

dom.setProperty "SelectionLanguage", "XPath" 

，以確保你做任何selectNodes或selectSingleNode調用之前啓用的XPath。