xml - 使用 Powershell 更新 Azure 服务配置文件

Question

我正在尝试编写一个 powershell 脚本来更新下面的每个 DiagnosticsConnectionString 和 DataConnectionString 值，但我似乎无法使用

找到每个单独的角色节点

$serviceconfig.ServiceConfiguration.SelectSingleNode("Role[@name='MyService_WorkerRole']")

执行echo $serviceconfig.ServiceConfiguration.Role为我列出了两个角色节点，所以我知道它到目前为止正在工作，但在那之后我没有取得太大成功。

其中 $serviceConfig 包含以下 XML:

<?xml version="1.0"?>
<ServiceConfiguration serviceName="MyService"  xmlns="http://schemas.microsoft.com/ServiceHosting/2008/10/ServiceConfiguration">
  <Role name="MyService_WorkerRole">
    <Instances count="1" />
    <ConfigurationSettings>
      <Setting name="DiagnosticsConnectionString" value="really long string" />
      <Setting name="DataConnectionString" value="really long string 2" />
    </ConfigurationSettings>
  </Role>
  <Role name="MyService_WebRole">
    <Instances count="1" />
    <ConfigurationSettings>
      <Setting name="DiagnosticsConnectionString" value="really long string 3" />
      <Setting name="DataConnectionString" value="really long string 4" />
    </ConfigurationSettings>
  </Role>
</ServiceConfiguration>

Answer 1

我会跳过 XPath，只使用 PowerShell 进行过滤。

$serviceConfig.ServiceConfiguration.Role |
    ? { $_.name -eq 'MyService_WorkerRole' } |
    % { $_.ConfigurationSettings.Setting } |
    ? { $_.name -like 'Diag*' } |
    % { $_.value = 'sup' }

此时如果我们做这样的事情...

$serviceConfig.ServiceConfiguration.Role[1].ConfigurationSettings.OuterXml

我们会得到这个...

<ConfigurationSettings xmlns="http://schemas.microsoft.com/ServiceHosting/2008/10/ServiceConfiguration">
  <Setting name="DiagnosticsConnectionString" value="sup" />
  <Setting name="DataConnectionString" value="really long string 2" />
</ConfigurationSettings>