我需要使用来自TFS的全局列表。我已经下载了它,并且可以访问xml,它有一个名称空间。我创建了一个XmlNamespaceManager
,但是我仍然在获取所需的节点时遇到问题。对于那些不熟悉的人,TFS全局列表如下所示:
<gl:GLOBALLISTS xmlns:gl="http://schemas.microsoft.com/VisualStudio/2005/workitemtracking/globallists">
<GLOBALLIST name="Builds">
<LISTITEM value="..." />
</GLOBALLIST>
...
<GLOBALLIST name="Client Name">
<LISTITEM value="Test" />
将全局列表下载到XmlDocument
中后,我使用以下代码尝试提取测试节点,但得到的结果为空。
Dim globalList As XmlDocument = store.ExportGlobalLists()
Dim nsManager As XmlNamespaceManager = New XmlNamespaceManager(globalList.NameTable)
nsManager.AddNamespace("gl", "http://schemas.microsoft.com/VisualStudio/2005/workitemtracking/globallists")
Dim node As XmlNode = globalList.SelectSingleNode("//gl:GLOBALLISTS/gl:GLOBALLIST[@name='Client Name']/gl:LISTITEM[@value='" + Name + "']", nsManager)
顺便说一句,我正在搜索的名字确实存在。我还在“即时”窗口中尝试了以下操作:
globalList.SelectNodes("/gl:GLOBALLISTS", nsManager)
Expression has been evaluated and has no value
globalList.SelectSingleNode("//gl:GLOBALLISTS/gl:GLOBALLIST[name='Client Name']/gl:LISTITEM[value='" + Name + "']", nsManager)
Expression has been evaluated and has no value
globalList.SelectSingleNode("//gl:GLOBALLIST[name='Client Name']/gl:LISTITEM[value='" + Name + "']", nsManager)
Expression has been evaluated and has no value
globalList.SelectSingleNode("//gl:GLOBALLIST[name='Client Name']", nsManager)
Expression has been evaluated and has no value
globalList.SelectSingleNode("//gl:GLOBALLIST", nsManager)
Expression has been evaluated and has no value
globalList.SelectSingleNode("//gl:GLOBALLISTS/GLOBALLIST[name='Client Name']/LISTITEM[value='Test']", nsManager)
Expression has been evaluated and has no value
globalList.SelectSingleNode("/gl:GLOBALLISTS/gl:GLOBALLIST[@name='Client Name']/gl:LISTITEM[@value='" + Name + "']", nsManager)
Expression has been evaluated and has no value
解决方案
我必须去掉除第一个节点之外的名称空间引用,并添加@符号来访问属性,如下面的答案所示。
Dim node As XmlNode = globalList.SelectSingleNode("//gl:GLOBALLISTS/GLOBALLIST[@name='Client Name']/LISTITEM[@value='" + Name + "']", nsManager)
发布于 2019-06-20 06:08:09
在XPath中,使用@
表示属性。这似乎就是你遇到问题的原因,因为你没有使用@
。
此外,正如您自己发现的那样,只有最外层的元素在名称空间中,所以只有第一个段应该有gl:
。
Dim node As XmlNode = globalList.SelectSingleNode("/gl:GLOBALLISTS/GLOBALLIST[@name='Client Name']/LISTITEM[@value='" + Name + "']", nsManager)
https://stackoverflow.com/questions/56675423
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