blocks|key|2870472|text|上面使用字典的->level2来自于我的例子中的字典(以防万一有人会发现它很有用)尝试第一个例子时，我偶然发现了这个错误：“这个文档已经有一个'DocumentElement‘节点。”我受到了here这个答案的启发|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2870473|并编辑了我的代码：(xmlDoc.DocumentElement.AppendChild(body))|style|BOLD|2870474|//a+dictionary:
Dictionary<string,+string>+Level2Data+
{
++++{"level2",+"text"},
++++{"level2",+"other+text"},
++++{"same_level2",+"more+text"}
}
//xml+Decalration:
XmlDocument+xmlDoc+=+new+XmlDocument();
XmlDeclaration+xmlDeclaration+=+xmlDoc.CreateXmlDeclaration("1.0",+"UTF-8",+null);
XmlElement+root+=+xmlDoc.DocumentElement;
xmlDoc.InsertBefore(xmlDeclaration,+root);
//+add+body
XmlElement+body+=+xmlDoc.CreateElement(string.Empty,+"body",+string.Empty);
xmlDoc.AppendChild(body);
XmlElement+body+=+xmlDoc.CreateElement(string.Empty,+"body",+string.Empty);
xmlDoc.DocumentElement.AppendChild(body);+//without+DocumentElement+->ERR



foreach+(KeyValuePair<string,+string>+entry+in+Level2Data)
{
++++//write+to+xml:+-+it+works+version+1.
++++XmlNode+keyNode+=+xmlDoc.CreateElement(entry.Key);+//open+TAB
++++keyNode.InnerText+=+entry.Value;
++++body.AppendChild(keyNode);+//close+TAB

++++//Write+to+xmml+verdion+2:+(uncomment+the+next+4+lines+and+comment+the+above+3+-+version+1
++++//XmlElement+key+=+xmlDoc.CreateElement(string.Empty,+entry.Key,+string.Empty);
++++//XmlText+value+=+xmlDoc.CreateTextNode(entry.Value);
++++//key.AppendChild(value);
++++//body.AppendChild(key);
}|code-block|syntax|javascript|2870475|两个版本(+foreach循环中的1和2)都给出了输出：|2870476|<?xml+version="1.0"+encoding="UTF-8"?>
<body>
++++<level1>
++++++++<level2>text</level2>
++++++++<level2>ther+text</level2>
+++++++++<same_level2>more+text</same_level2>
++++</level1>
</body>|2870477|(注意:字典中的第三行"same+level2“也可以是level2，但我想说明字典的优点-在我的例子中，我需要不同名称的level2。|2870478|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/6262815/this-document-already-has-a-documentelement-node/6262889^0|2O|4|0|0|H|F|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@$A|11|B|12|1|13]]|C|$]]|$1|D|3|E|5|6|7|14|8|@$A|15|B|16|F|G]]|9|@]|C|$]]|$1|H|3|I|5|J|7|17|8|@]|9|@]|C|$K|L]]|$1|M|3|N|5|6|7|18|8|@]|9|@]|C|$]]|$1|O|3|P|5|J|7|19|8|@]|9|@]|C|$K|L]]|$1|Q|3|R|5|6|7|1A|8|@]|9|@]|C|$]]|$1|S|3|-4|5|6|7|1B|8|@]|9|@]|C|$]]]|T|$U|$5|V|W|X|C|$Y|Z]]]]

Working with a dictionary ->level2 above comes from a dictionary in my case (just in case anybody will find it useful)
Trying the first example I stumbled over this error:
"This document already has a 'DocumentElement' node."
I was inspired by the answer <a href="https://stackoverflow.com/questions/6262815/this-document-already-has-a-documentelement-node/6262889">here</a>

and edited my code: (xmlDoc.DocumentElement.AppendChild(body))

<pre><code>//a dictionary:
Dictionary&lt;string, string&gt; Level2Data 
{
 {"level2", "text"},
 {"level2", "other text"},
 {"same_level2", "more text"}
}
//xml Decalration:
XmlDocument xmlDoc = new XmlDocument();
XmlDeclaration xmlDeclaration = xmlDoc.CreateXmlDeclaration("1.0", "UTF-8", null);
XmlElement root = xmlDoc.DocumentElement;
xmlDoc.InsertBefore(xmlDeclaration, root);
// add body
XmlElement body = xmlDoc.CreateElement(string.Empty, "body", string.Empty);
xmlDoc.AppendChild(body);
XmlElement body = xmlDoc.CreateElement(string.Empty, "body", string.Empty);
xmlDoc.DocumentElement.AppendChild(body); //without DocumentElement -&gt;ERR



foreach (KeyValuePair&lt;string, string&gt; entry in Level2Data)
{
 //write to xml: - it works version 1.
 XmlNode keyNode = xmlDoc.CreateElement(entry.Key); //open TAB
 keyNode.InnerText = entry.Value;
 body.AppendChild(keyNode); //close TAB

 //Write to xmml verdion 2: (uncomment the next 4 lines and comment the above 3 - version 1
 //XmlElement key = xmlDoc.CreateElement(string.Empty, entry.Key, string.Empty);
 //XmlText value = xmlDoc.CreateTextNode(entry.Value);
 //key.AppendChild(value);
 //body.AppendChild(key);
}
</code></pre>

Both versions (1 and 2 inside foreach loop) give the output:

<pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt;
&lt;body&gt;
 &lt;level1&gt;
 &lt;level2&gt;text&lt;/level2&gt;
 &lt;level2&gt;ther text&lt;/level2&gt;
 &lt;same_level2&gt;more text&lt;/same_level2&gt;
 &lt;/level1&gt;
&lt;/body&gt;
</code></pre>

(Note: third line "same level2" in dictionary can be also level2 as the others but I wanted to ilustrate the advantage of the dictionary - in my case I needed level2 with different names.

how to create an XML document like this?

<pre><code>&lt;body&gt;
 &lt;level1&gt;
 &lt;level2&gt;text&lt;/level2&gt;
 &lt;level2&gt;other text&lt;/level2&gt;
 &lt;/level1&gt;
&lt;/body&gt;
</code></pre>

using <code>XmlDocument</code> in C#

How to create an XML document using XmlDocument?

如何创建这样的XML文档？<body> <level1> <level2>text</level2> <level2>other text</level2> </level1></body>在C#中使用XmlDocument

问如何使用XmlDocument创建XML文档？
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