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& 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();
}
}
解决方案
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?