Question

我有一个类似这样的XML文件：

<globalConfigs>
  <!-- some settings -->
  <globalConfig key="currency" value="£" />
</globalConfigs>

我有一些Powershell正在按照以下方式操纵它：

function Update-Config ($filePath, $siteName) {
    [xml]$config = Get-Content $filePath;
    $newNode = $config.CreateElement("globalConfig");

    $keyAttribute = $config.CreateAttribute("key");
    $keyAttribute.Value = "currencyCode";
    $newNode.Attributes.Append($keyAttribute);

    $valAttribute = $config.CreateAttribute("value");
    $valAttribute.Value = "GBP";
    $newNode.Attributes.Append($valAttribute);

    $config.globalConfigs.AppendChild($newNode);
    Write-Log "Added config node to site.";
    $config.Save($filePath);
}

现在这可以正常工作，因为它添加了新密钥。但是得到的xml在井号前添加了一个额外的字符：

<globalConfigs>
  <!-- some settings -->
  <globalConfig key="currency" value="Â£" />
  <globalConfig key="currencyCode" value="GBP" />
</globalConfigs>

造成这个额外角色的原因是什么？它似乎是断断续续的，但它经常被添加。

Answer 1

Your XML contains a non-ASCII character without proper encoding. Either encode the character as an entity reference (£), or add a declaration to your XML data:

function Update-Config ($filePath, $siteName) {
    [xml]$config = Get-Content $filePath;
    $newNode = $config.CreateElement("globalConfig");

    $keyAttribute = $config.CreateAttribute("key");
    $keyAttribute.Value = "currencyCode";
    $newNode.Attributes.Append($keyAttribute);

    $valAttribute = $config.CreateAttribute("value");
    $valAttribute.Value = "GBP";
    $newNode.Attributes.Append($valAttribute);

    $config.globalConfigs.AppendChild($newNode)
    Write-Log "Added config node to site."
    $declaration = $config.CreateXmlDeclaration('1.0', 'utf-8', $null)
    [void]$config.InsertBefore($declaration, $config.DocumentElement)
    $config.Save($filePath)
}

Answer 2

我设法解决了这个问题 - 问题出在Get-Content cmdlet中。如果我将加载XML的行更改为：

[xml]$config = Get-Content $filePath -Encoding UTF8;

然后我不会在输出中得到不需要的字符。

Powershell在XML中添加字符

2 个答案: