使用 c# Xdocument 类添加子节点
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/17916788/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Adding child nodes using c# Xdocument class
提问by tjdoubts
I have an xml file as given below.
我有一个 xml 文件，如下所示。
<?xml version="1.0" encoding="utf-8"?>
<file:Situattion xmlns:file="test">
<file:Properties>
</file:Situattion>
I would like to add the child element file:Character using xDocument.So that my final xml would be like given below
我想添加子元素 file:Character using xDocument.So 这样我的最终 xml 将如下所示
<?xml version="1.0" encoding="utf-8"?>
<file:Situattion xmlns:file="test">
<file:Characters>
<file:Character file:ID="File0">
<file:Value>value0</file:Value>
<file:Description>
Description0
</file:Description>
</file:Character>
<file:Character file:ID="File1">
<file:Value>value1</file:Value>
<file:Description>
Description1
</file:Description>
</file:Character>
</file:Characters>
Code in c# i tried using Xdocument class is given below.
下面给出了我尝试使用 Xdocument 类的 c# 代码。
XNamespace ns = "test";
Document = XDocument.Load(Folderpath + "\File.test");
if (Document.Descendants(ns + "Characters") != null)
{
Document.Add(new XElement(ns + "Character"));
}
Document.Save(Folderpath + "\File.test");
At line "Document.Add(new XElement(ns + "Character"));", I am getting an error:
在“ Document.Add(new XElement(ns + "Character"));”行，我收到一个错误：
"This operation would create an incorrectly structured document.".
"This operation would create an incorrectly structured document.".
How can I add the node under "file:Characters".
如何在“ file:Characters”下添加节点。
采纳答案by Jon Skeet
You're trying to add an extra file:Characterelement directlyinto the root. You don't want to do that - you want to add it under the file:Characterselement, presumably.
您正在尝试将额外的file:Character元素直接添加到根中。您不想这样做 - 您想将它添加到file:Characters元素下，大概。
Also note that Descendants()will neverreturn null - it will return an empty sequence if there are no matching elements. So you want:
另外请注意，Descendants()将永远不会返回null -如果没有匹配的元素就会返回一个空序列。所以你要：
var ns = "test";
var file = Path.Combine(folderPath, "File.test");
var doc = XDocument.Load(file);
// Or var characters = document.Root.Element(ns + "Characters")
var characters = document.Descendants(ns + "Characters").FirstOrDefault();
if (characters != null)
{
characters.Add(new XElement(ns + "Character");
doc.Save(file);
}
Note that I've used more conventional naming, Path.Combine, and also moved the Savecall so that you'll only end up saving if you've actually made a change to the document.
请注意，我使用了更传统的命名方式 ，Path.Combine并且还移动了Save调用，因此只有在您实际对文档进行了更改时才能最终保存。
回答by Prash
Document.Root.Element("Characters").Add(new XElement("Character", new XAttribute("ID", "File0"), new XElement("Value", "value0"), new XElement("Description")),
new XElement("Character", new XAttribute("ID", "File1"), new XElement("Value", "value1"), new XElement("Description")));
Note:I have not included the namespace for brevity. You have to add those.
注意：为简洁起见，我没有包含命名空间。你必须添加这些。
