使用Powershell更新web.config中的WCF端点节点

Question

我需要在我们的web.config中更新一组WCF端点，我想把它作为一个命令添加到一个powershell脚本中。下面是我目前正在编写的脚本。它将很好地更新ConnectionString节点，但是它在Periscope.My.MySettings部分中找不到任何value节点。

循环将执行特定次数，但是每次$_.value变量中的值都是空的。

web.config

<applicationSettings>
  <Periscope.My.MySettings>
    <setting name="Periscope_periscopeSearch_Service1" serializeAs="String">
      <value>http://inside.com/periscopeSearch/Service1.asmx</value>
    </setting>
    <setting name="Periscope_periscopeRetrieveRelationships_Service1" serializeAs="String">
      <value>http://inside.com/periscopeRetrieveRelationships/Service1.asmx</value>
    </setting>
    <setting name="Periscope_periscopeRetrieveProducers_Service1" serializeAs="String">
      <value>http://inside.com/periscopeRetrieveProducers/Service1.asmx</value>
    </setting>
    <setting name="Periscope_periscopeRetrieveMasterSubs_Service1" serializeAs="String">
      <value>http://inside.com/periscopeRetrieveMasterSubs/Service1.asmx</value>
    </setting>
    <setting name="Periscope_periscopeRetrieveGeneral_Service1" serializeAs="String">
      <value>http://inside.com/periscopeRetrieveGeneral/Service1.asmx</value>
    </setting>
    <setting name="Periscope_periscopeRetrieveComments_Service1" serializeAs="String">
      <value>http://inside.com/periscopeRetrieveComments/Service1.asmx</value>
    </setting>
    <setting name="Periscope_periscopeRetrieveProfiles_Service1" serializeAs="String">
      <value>http://inside.com/periscopeRetrieveProfiles/Service1.asmx</value>
    </setting>
  </Periscope.My.MySettings>
</applicationSettings>

Powershell

$dir = Get-ChildItem $directory -Recurse 
$config = $dir  | where {$_.extension -eq ".config"}

#generated config connection strings
foreach($file in $config)
{   
    Write-Host "Updating $file" -ForegroundColor Green    
    $doc = [xml](Get-Content $file.FullName)

    #THIS WORKS FINE
    if($doc.configuration.connectionStrings){
        $doc.configuration.connectionStrings.add |%{
            if($_.connectionString.ToLower() -match $oldDb.ToLower()){
                $_.connectionString = $_.connectionString.ToLower().replace($oldDb.ToLower(), $newDb)
            }
        }
    }

    #THE $_.value VARIABLE IS EMPTY EVERY TIME
    $doc.configuration.applicationSettings.Periscope.My.MySettings.add | foreach {
        if($_.value){
            $tempString = $_.value.ToLower()
            if($tempString -match $oldDb.ToLower()){
                $_.value = $tempString.replace($oldDb, $newDb)
            }
            elseif($tempString -match $oldDomain.ToLower()){
                $_.value = $tempString.replace($oldDomain.ToLower(), $newDomain)
            }
        }   
    }

    $doc.Save($file.FullName) 
}

Answer 1

您有带句点(Periscope.My.MySettings)的XML元素，所以必须用'来转义它们，这样xml才能正确地将其作为一个元素来处理，而不是3个单独的元素。您还需要将add更改为setting，因为add在设置中不存在，它只存在于连接字符串中。

您应该像这样修改代码：

$doc.configuration.applicationSettings.'Periscope.My.MySettings'.setting | foreach {
    # Your other code
}