全部,我正在尝试从Azure云服务定义xml文件或Azure云服务配置xml文件中读取角色信息.
但发现XPath不适用于他们.两个xml文件都包含名称空间.
默认情况下,命名空间没有别名.如果我为它添加别名.Visual studio会提醒我不允许.
说你的定义如下.并且XmlPath是/ ServiceDefinition / WebRole / @vmsize.我在XPath online tools测试了它,它也无法为我获得正确的价值.
<?xml version="1.0" encoding="utf-8"?>
<ServiceDefinition name="test" xmlns="http://schemas.microsoft.com/ServiceHosting/2008/10/ServiceDefinition" schemaVersion="2012-10.1.8">
<WebRole name="test" vmsize="Small">
<Sites>
<Site name="Web">
<Bindings>
<Binding name="Endpoint1" endpointName="HttpsEndpoint" />
<Binding name="Endpoint2" endpointName="HttpEndpoint" />
</Bindings>
</Site>
</Sites>
<Endpoints>
<InputEndpoint name="HttpsEndpoint" protocol="https" port="443" certificate="Certificate1" />
<InputEndpoint name="HttpEndpoint" protocol="http" port="80" />
</Endpoints>
<Imports>
<Import moduleName="Diagnostics" />
<Import moduleName="RemoteAccess" />
<Import moduleName="RemoteForwarder" />
</Imports>
<Certificates>
<Certificate name="Certificate1" storeLocation="LocalMachine" storeName="My" />
</Certificates>
<ConfigurationSettings>
<Setting name="LogLevel" />
</ConfigurationSettings>
</WebRole>
</ServiceDefinition>
有没有办法使这个XPath工作？
将Select-Xml cmdlet与-XPath参数一起使用时,还需要指定命名空间.有关更多信息,请参阅此文章：
http://huddledmasses.org/xpath-and-namespaces-in-powershell/
这是一个完整的,有效的例子
$XmlDocument = [xml]@'
<?xml version="1.0" encoding="utf-8"?>
<ServiceDefinition name="test" xmlns="http://schemas.microsoft.com/ServiceHosting/2008/10/ServiceDefinition" schemaVersion="2012-10.1.8">
<WebRole name="test" vmsize="Small">
<Sites>
<Site name="Web">
<Bindings>
<Binding name="Endpoint1" endpointName="HttpsEndpoint" />
<Binding name="Endpoint2" endpointName="HttpEndpoint" />
</Bindings>
</Site>
</Sites>
<Endpoints>
<InputEndpoint name="HttpsEndpoint" protocol="https" port="443" certificate="Certificate1" />
<InputEndpoint name="HttpEndpoint" protocol="http" port="80" />
</Endpoints>
<Imports>
<Import moduleName="Diagnostics" />
<Import moduleName="RemoteAccess" />
<Import moduleName="RemoteForwarder" />
</Imports>
<Certificates>
<Certificate name="Certificate1" storeLocation="LocalMachine" storeName="My" />
</Certificates>
<ConfigurationSettings>
<Setting name="LogLevel" />
</ConfigurationSettings>
</WebRole>
</ServiceDefinition>
'@;
$XmlNamespace = @{ azure = 'http://schemas.microsoft.com/ServiceHosting/2008/10/ServiceDefinition'; };
Select-Xml -Xml $XmlDocument -XPath '/azure:ServiceDefinition/azure:WebRole/@vmsize' -Namespace $XmlNamespace;
