VBScript中的XPath计数

Question

我试图使用XPath计数函数获取XML文件中的特定节点数,但是,这会一直返回错误"类型的异常'msxml3.dll:Expression不返回DOM节点."

如何使用VBScript和MSXML DOM从XPath计数中获取返回值

Dim oXML    
Dim homeId
Dim awayId
Dim homeGoals
Dim awayGoals
Set oXML = Server.CreateObject("Microsoft.XMLDOM")

oXML.async = false
oXML.SetProperty "SelectionLanguage", "XPath"
oXML.SetProperty "ServerHTTPRequest", True
oXML.validateOnParse = False
oXML.resolveExternals = False

fileName = "http://server:8090/data/results/m12345.xml")
oXML.load (fileName)

homeId = oXML.SelectSingleNode("/SoccerMatch/Team[@homeOrAway='Home']/@id").text
awayId = oXML.SelectSingleNode("/SoccerMatch/Team[@homeOrAway='Away']/@id").text
Set homeGoals = oXML.SelectSingleNode("count(/SoccerMatch/Goals/Goal[@teamId="&homeId&"])")
Set awayGoals = oXML.SelectSingleNode("count(/SoccerMatch/Goals/Goal[@teamId="&awayId&"])")

Answer 1

您只能使用在MSXML中返回节点的XPath,其他XPath函数只能用于最终导致选择节点的谓词.

使用:-

homeGoals = oXML.SelectNodes("/SoccerMatch/Goals/Goal[@teamId="&homeId&"]").length