XMLDocument，innerxml 和outerxml 的区别 [英] XMLDocument, difference between innerxml and outerxml

问题描述

OuterXml - 获取表示当前节点及其所有子节点的 XML 标记.

OuterXml - gets the XML markup representing the current node and all its child nodes.

InnerXml - 获取仅表示当前节点的子节点的 XML 标记.

InnerXml - gets the XML markup representing only the child nodes of the current node.

但是对于 XMLDocument 真的重要吗?(结果明智，我知道这无关紧要，但在逻辑上?).

But for XMLDocument does it really matter? (result-wise, well I know it doesn't matter, but logically?).

示例:

XmlDocument doc = new XmlDocument();
doc.LoadXml("<book genre='novel' ISBN='1-861001-57-5'>" +
    "<title>Pride And Prejudice</title>" +
    "</book>");

string xmlresponse = doc.OuterXml;
string xmlresponse2 = doc.InnerXml;

简单来说，虽然 xmlresponse 和 xmlresponse2 在上面的代码中是相同的.我应该更喜欢使用 OuterXml 还是 InnerXml?

In simple words, though both xmlresponse and xmlresponse2 will be the same in the code above. Should I prefer using OuterXml or InnerXml?

推荐答案

如果你想找出为什么 XmlDocument 的 OuterXml 和 InnerXml 是相同的:看看 XmlDocument 代表什么节点 - 它是整个 Xml 树的父节点.但它本身没有任何视觉表现——所以我"+儿童内容"因为它与儿童内容"相同.

If you are trying to find why they OuterXml and InnerXml are the same for XmlDocument: look at what XmlDocument represents as node - it is parent of whole Xml tree. But by itself it does not have any visual representation - so "Me"+ "content of children" for it is the same as "content of children".

您可以编写基本代码来遍历 XmlNode + 子节点并传递 XmlDocument 以查看其行为方式:

You can write basic code to walk XmlNode + children and pass XmlDocument to see why it behaves this way:

XmlDocument doc = new XmlDocument();
doc.LoadXml("<?xml version='1.0' ?><root><item>test</item></root>");

Action<XmlNode, string> dump=null;
dump = (root, prefix) => {
  Console.WriteLine("{0}{1} = {2}", prefix, root.Name, root.Value); 
  foreach (XmlNode n in root.ChildNodes)
  {
    dump(n, "  " + prefix);
  }
};

dump(doc,"");

输出显示 XmlDocument XmlDocument 本身没有任何内容具有可视化表示，并且第一个具有文本表示的节点是它的子节点:

Output shows that XmlDocument there is nothing in XmlDocument itself that have visual representation and the very first node that have text representation is child of it:

#document = 
  xml = version="1.0"
  root = 
    item = 
      #text = test

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