使用XDoc读取xml文件

Question

我正在尝试读取以下文件(部分呈现)

<?xml version="1.0" encoding="utf-8"?>
 <asmv1:assembly xsi:schemaLocation="urn:schemas-microsoft-com:asm.v1 assembly.adaptive.xsd"
 manifestVersion="1.0"
 xmlns:asmv3="urn:schemas-microsoft-com:asm.v3"
 xmlns:dsig="http://www.w3.org/2000/09/xmldsig#"
 xmlns:co.v1="urn:schemas-microsoft-com:clickonce.v1"
 xmlns:co.v2="urn:schemas-microsoft-com:clickonce.v2"
 xmlns="urn:schemas-microsoft-com:asm.v2"
 xmlns:asmv1="urn:schemas-microsoft-com:asm.v1"
 xmlns:asmv2="urn:schemas-microsoft-com:asm.v2"
 xmlns:xrml="urn:mpeg:mpeg21:2003:01-REL-R-NS"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <assemblyIdentity name="program.application" version="4.0.0.27077" publicKeyToken="8f99fe9fddfae125e" language="neutral" processorArchitecture="msil" xmlns="urn:schemas-microsoft-com:asm.v1" />

我有过

Dim manifestFile As String = webClient.DownloadString(location)
Dim xdoc As New Xml.XmlDocument()
xdoc.LoadXml(manifestFile)

我试过了

xdoc.SelectSingleNode("//asmv1:assemblyIdentity")
xdoc.SelectSingleNode("//assemblyIdentity")

Dim nsSys As Xml.XmlNamespaceManager = New Xml.XmlNamespaceManager(xdoc.NameTable)
nsSys.AddNamespace("def", "urn:schemas-microsoft-com:asm.v1 assembly.adaptive.xsd")
xdoc.SelectSingleNode("//asmv1:assemblyIdentity",ns)
xdoc.SelectSingleNode("//assemblyIdentity",ns)
xdoc.SelectSingleNode("//def:assemblyIdentity",ns)

所有返回的Nothing

选择<assemblyIdentity>节点的正确路径是什么？

注意:我不能使用LinqToXml

谢谢

Answer 1

假设我关闭标记文件，如下所示：

<?xml version="1.0" encoding="utf-8"?>
    <asmv1:assembly xsi:schemaLocation="urn:schemas-microsoft-com:asm.v1 assembly.adaptive.xsd" manifestVersion="1.0" xmlns:asmv3="urn:schemas-microsoft-com:asm.v3" xmlns:dsig="http://www.w3.org/2000/09/xmldsig#" xmlns:co.v1="urn:schemas-microsoft-com:clickonce.v1" xmlns:co.v2="urn:schemas-microsoft-com:clickonce.v2" xmlns="urn:schemas-microsoft-com:asm.v2" xmlns:asmv1="urn:schemas-microsoft-com:asm.v1" xmlns:asmv2="urn:schemas-microsoft-com:asm.v2" xmlns:xrml="urn:mpeg:mpeg21:2003:01-REL-R-NS" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
       <assemblyIdentity name="program.application" version="4.0.0.27077" publicKeyToken="8f99fe9fddfae125e" language="neutral" processorArchitecture="msil" xmlns="urn:schemas-microsoft-com:asm.v1" />
    </asmv1:assembly>

下面的方法对我很有效：

Dim doc As New XmlDocument()
Dim nsmgr As New XmlNamespaceManager(doc.NameTable)

doc.Load("c:\temp\temp2.xml")
nsmgr.AddNamespace("asmv1", "urn:schemas-microsoft-com:asm.v1")

Dim node As XmlNode = doc.SelectSingleNode("//asmv1:assemblyIdentity", nsmgr)
MessageBox.Show(node.OuterXml)

并返回：

<assemblyIdentity name="program.application" version="4.0.0.27077" publicKeyToken="8f99fe9fddfae125e" language="neutral" processorArchitecture="msil" xmlns="urn:schemas-microsoft-com:asm.v1" />

<assemblyIdentity>节点引用asmv1名称空间，因此需要将其添加到XMLNamespaceManager中