转义的XmlElement unicode字符串，尽管在UTF-8编写XML

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问题描述

对于给定的的XmlElement ，我需要能够设置内部文本的unicode字符串的转义版本，尽管UTF-8最终被编码的文件。有没有实现这一目标。

For a given XmlElement, I need to be able to set the inner text to an escaped version of the unicode string, despite the document ultimately being encoded in UTF-8. Is there any way of achieving this?

下面是代码的简单版本的任何方式：

Here's a simple version of the code:

const string text = "&#xF1;";

var document = new XmlDocument {PreserveWhitespace = true};
var root = document.CreateElement("root");
root.InnerXml = text;
document.AppendChild(root);

var settings = new XmlWriterSettings {Encoding = Encoding.UTF8, OmitXmlDeclaration = true};
using (var stream = new FileStream("out.xml", FileMode.Create))
using (var writer = XmlWriter.Create(stream, settings))
    document.WriteTo(writer);

预期：

Expected:

<root>&#xF1;</root>

实际

Actual:

<root>ñ</root>

使用的XmlWriter 直接调用 WriteRaw（文本）工作，但我只是有机会获得的XmlDocument 和序列化后发生的。在的XmlElement ，的InnerText 脱&安培; 到&放大器;放大器; ，符合市场预期，并设置值抛出异常。

Using an XmlWriter directly and calling WriteRaw(text) works, but I only have access to an XmlDocument, and the serialization happens later. On the XmlElement, InnerText escapes the & to &, as expected, and setting Value throws an exception.

有一个的XmlElement 的内部文本设置为逃脱ASCII文本，而不管最终使用的编码的一些方法？我觉得我必须缺少明显的东西，或者它只是不可能的。

Is there some way of setting the inner text of an XmlElement to the escaped ascii text, regardless of the encoding that is ultimately used? I feel like I must be missing something obvious, or it's just not possible.

感谢

推荐答案

如果你问的XmlWriter生成ASCII输出，它应该给所有非ASCII内容你人品引用。

If you ask XmlWriter to produce ASCII output, it should give you character references for all non-ASCII content.

var settings = new XmlWriterSettings {Encoding = Encoding.ASCII, OmitXmlDeclaration = true};

输出仍然是有效的UTF-8，因为ASCII是UTF-8的一个子集。

The output is still valid UTF-8, because ASCII is a subset of UTF-8.

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