我试图反向转义的XML实体在一个字符串中的.NET（C＃），但我似乎并没有得到它才能正常工作。

例如，如果我有字符串 AT＆功放; amp; T公司，它应该被翻译为 AT＆amp; T公司。

一种方法是使用HttpUtility.HtmlDe code（），但这是HTML。

所以，我有两个问题，关于这一点：

是否可以安全使用HttpUtility.HtmlDe code（）为XML实体解码？

我如何使用的XmlReader（或类似的东西），要做到这一点？我曾尝试以下，但总是返回一个空字符串：

 静态字符串ReplaceEscapes（文本字符串）
{
    StringReader读卡器=新StringReader（文本）;

    XmlReaderSettings设置=新XmlReaderSettings（）;

    settings.ConformanceLevel = ConformanceLevel.Fragment;

    使用（的XmlReader的XMLReader = XmlReader.Create（阅读器，设置））
    {
        返回xmlReader.ReadString（）;
    }
}
 

解决方案

您＃2解决方案可以工作，但你需要调用 xmlReader.Read（）; （或 xmlReader.MoveToContent（）; ）之前， ReadString

我猜＃1将是可以接受的，即使有像＆放那些边缘的情况下;章; 这是一个有效的HTML实体，但不是一个XML实体 - 什么都要你unescaper什么关系呢？抛出一个异常作为一个适当的XML解析器，或只返回®为HTML解析器会做什么？

I'm trying to unescape XML entities in a string in .NET (C#), but I don't seem to get it to work correctly.

For example, if I have the string AT&T, it should be translated to AT&T.

One way is to use HttpUtility.HtmlDecode(), but that's for HTML.

So I have two questions about this:

Is it safe to use HttpUtility.HtmlDecode() for decoding XML entities?

How do I use XmlReader (or something similar) to do this? I have tried the following, but that always returns an empty string:

static string ReplaceEscapes(string text)
{
    StringReader reader = new StringReader(text);

    XmlReaderSettings settings = new XmlReaderSettings();

    settings.ConformanceLevel = ConformanceLevel.Fragment;

    using (XmlReader xmlReader = XmlReader.Create(reader, settings))
    {
        return xmlReader.ReadString();
    }
}

Your #2 solution can work, but you need to call xmlReader.Read(); (or xmlReader.MoveToContent();) prior to ReadString.

I guess #1 would be also acceptable, even though there are those edge cases like ® which is a valid HTML entity, but not an XML entity – what should your unescaper do with it? Throw an exception as a proper XML parser, or just return "®" as the HTML parser would do?