使用c#Xdocument类添加子节点

Question

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>

我想添加子元素文件:使用xDocument.So的字符,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>

下面给出了使用Xdocument类尝试的c#中的代码.

        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");

在" Document.Add(new XElement(ns + "Character"));" 行,我收到一个错误:

"This operation would create an incorrectly structured document.".

如何在" file:Characters" 下添加节点.

Answer 1

您正尝试将额外file:Character元素直接添加到根目录中.你不想那样做 - 你想把它添加到file:Characters元素下面,大概是.

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);
}

请注意,我使用了更常规的命名,Path.Combine并且还Save调用了调用,这样只有在实际对文档进行更改时才会保存.

Answer 2

    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")));

注意:为简洁起见,我没有包含命名空间.你必须添加这些.