的XDocument字符串：如何省略编码的声明？ [英] XDocument to string: How to omit encoding in declaration?

问题描述

我正在写一个新空房禁地企业XML API的包装。我有一个XDocument，我需要转成字符串。由于这样的事实，他们的XML解析器是如此挑剔，它甚至不能处理XML节点之间的空白，文档声明必须精确：

I'm writing a wrapper for a braindead enterprise XML API. I have an XDocument that I need to turn into a string. Due to the fact that their XML parser is so finicky that it cannot even handle whitespace between XML nodes, the document declaration MUST be EXACTLY:

<?xml version="1.0"?>

不过，XDocument.Save（）方法的总是在声明中补充道编码属性：

However, the XDocument.Save() method always adds an encoding attribute in that declaration:

<?xml version="1.0" encoding="utf-16"?>

随着过去一小时的谷歌和堆栈寻找生成XML字符串的最佳方式度过的，我能做的最好的是：

With the past hour spent on Google and Stack looking for the best way to generate the XML string, the best I can do is:

string result = xmlStringBuilder.ToString().Replace(@"encoding=""utf-16"", string.Empty));

我试过

xdoc.Declaration = new XDeclaration("1.0", null, null);

和，它在我想要的方式设置在XDocument申报成功;然而，当我调用Save（）方法，编码属性被神奇地后仰在那里，无论我走什么路线（使用的TextWriter，加入XmlWriterSettings，等等）。

and that does succeed at setting the declaration in the XDocument the way I want it; however, when I call the Save() method, the encoding attribute gets magically thrown back in there, no matter what route I go (using TextWriter, adding XmlWriterSettings, etc.).

有没有人有更好的方式来做到这一点，或者是我的code永远注定要在可怕的串上述评论咆哮更换一个段落？

Does anyone have a better way to do this, or is my code forever doomed to have a paragraph of ranting in comments above the hideous string replace?

推荐答案

好接收端应该是固定的，如果你想创建的字符串使用XML解析器和不是使用XML语法，但使用.NET打破XML声明为您发布它下面的方法对我的作品：

Well the receiving end should be fixed to use an XML parser and not something that breaks with XML syntax but with .NET if you want to create a string with the XML declaration as you posted it the following approach works for me:

public class MyStringWriter : StringWriter
{
    public override Encoding Encoding
    {
        get
        {
            return null;
        }
    }
}

然后

    XDocument doc = new XDocument(
        new XDeclaration("1.0", null, null),
        new XElement("root", "test")
        );

    string xml;

    using (StringWriter msw = new MyStringWriter())
    {
        doc.Save(msw);
        xml = msw.ToString();
    }

    Console.WriteLine(xml);

输出

<?xml version="1.0"?>
<root>test</root>

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