在C#中，如何使用缩进将XmlNode转换为字符串? (无循环)

问题描述

限时删除！！

这必须是一个非常简单的问题，但我只是找不到答案.

This has got to be such a simple question but I just can't get the answer.

我有一个XmlNode，我要做的就是将此节点作为字符串输出，并完整保留缩进(制表符或空格)以提供更好的可读性.

I have an XmlNode and all I want to do is output this node, as a string, with indentations (tabs or spaces) intact to provide better readability.

到目前为止，我尝试了XmlWriter，XmlTextWriter，XmlDocument，XmlReader.

So far I tried XmlWriter, XmlTextWriter, XmlDocument, XmlReader.

• 我在XmlDocument中尝试了PreserveWhitespace，但无法获取XmlDocument输出节点.
• 我尝试了XmlTextWriter中的Formatting = Formatting.Indented属性，但是我不知道如何将内容输出为字符串.

将XmlNode输出为不带缩进的字符串很容易.我只是做XmlNode.OuterXml.我如何在其中获得压痕?

To output the XmlNode as string WITHOUT indentation is easy. I just do XmlNode.OuterXml. How do I get the indentations in there?

我想做到这一点而无需遍历XmlNode并使用蛮力添加空格，因为我认为应该有一个更简单的方法.

I want to do this without looping through the XmlNode and using brute force to add whitespace, because I think there should be a simpler way.

谢谢.

对于未来的读者，这是答案:

For future readers, here is the answer:

  var xmlNode = is some object of type XmlNode

  using (var sw = new StringWriter())
  {
      using (var xw = new XmlTextWriter(sw))
      {
        xw.Formatting = Formatting.Indented;
        xw.Indentation = 2; //default is 1. I used 2 to make the indents larger.

        xmlNode.WriteTo(xw);
      }
      return sw.ToString(); //The node, as a string, with indents!
  }

我需要这样做的原因是使用语法高亮显示了节点的xml.我使用AvalonEdit突出显示xml，将突出显示的文本输出为html，然后将html转换为FlowDocument，该文件可以显示在RichTextBox中.

The reason I needed to do this was output the node's xml with syntax highlighting. I used AvalonEdit to highlight the xml, outputted the highlighted text to html, then converted the html to a FlowDocument which could be displayed in a RichTextBox.

推荐答案

您在使用XMLTextWriter的正确路径上，只需要使用StringWriter作为基本流.这是一些好的答案关于如何完成的.如果您的编码需要为UTF-8，请特别注意第二个答案.

You were on the right path with the XMLTextWriter, you simply need to use a StringWriter as the base stream. Here are a few good answers on how this is accomplished. Pay particular attention to the second answer, if your encoding needs to be UTF-8.

如果您需要在多个地方执行此操作，那么编写扩展方法以使XmlNode上的ToString()重载是简单的:

If you need to do this in multiple places, it is trivial to write an extension method to overload a ToString() on XmlNode:

public static class MyExtensions
{
    public static string ToString(this System.Xml.XmlNode node, int indentation)
    {
        using (var sw = new System.IO.StringWriter())
        {
            using (var xw = new System.Xml.XmlTextWriter(sw))
            {
                xw.Formatting = System.Xml.Formatting.Indented;
                xw.Indentation = indentation;
                node.WriteContentTo(xw);
            }
            return sw.ToString();
        }
    }
}

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