在C#中，将字符串格式化为XML的最佳方法是什么?

问题描述：

我正在用C#创建一个轻量级的编辑器，并且想知道将字符串转换为格式正确的XML字符串的最佳方法.我希望C#库中有一个公共方法，例如"public bool FormatAsXml(string text，out string formattedXmlText)"，但这不是那么容易吗?

I am creating a lightweight editor in C# and would like to know the best method for converting a string into a nicely formatted XML string. I would hope that there's a public method in the C# library like "public bool FormatAsXml(string text, out string formattedXmlText)", but it couldn't be that easy, could it?

特别是，要产生以下输出的"SomeMethod"方法必须是什么?

Very specifically, what would the method "SomeMethod" have to be that would produce the output below?

string unformattedXml;
string formattedXml;

unformattedXml = "<?xml version=\"1.0\"?><book><author>Lewis, C.S.</author><title>The Four Loves</title></book>"
formattedXml = SomeMethod(unformattedXml);

Console.WriteLine(formattedXml);

输出:

<?xml version="1.0"?>
  <book id="123">
    <author>Lewis, C.S.</author>
    <title>The Four Loves</title>
  </book>

答

string unformattedXml = "<?xml version=\"1.0\"?><book><author>Lewis, C.S.</author><title>The Four Loves</title></book>";
string formattedXml = XElement.Parse(unformattedXml).ToString();
Console.WriteLine(formattedXml);

输出:

<book>
  <author>Lewis, C.S.</author>
  <title>The Four Loves</title>
</book>

Xml声明不是由ToString()输出的，而是由Save()输出的.

The Xml Declaration isn't output by ToString(), but it is by Save() ...

  XElement.Parse(unformattedXml).Save(@"C:\doc.xml");
  Console.WriteLine(File.ReadAllText(@"C:\doc.xml"));

输出:

<?xml version="1.0" encoding="utf-8"?>
<book>
  <author>Lewis, C.S.</author>
  <title>The Four Loves</title>
</book>

在C#中，将字符串格式化为XML的最佳方法是什么?

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