在添加新的 XML 节点时需要帮助

本文关键字：帮助 节点 XML 添加 | 更新日期: 2023-09-27 18:32:52

<?xml version="1.0" encoding="utf-8"?>
<mappings>
  <mapping>
    <aID iskey="true">ABC</aID>
    <bID iskey="true">DEF</bID>
    <SubAccount>PS</SubAccount>
    <Account>PS</Account>
  </mapping>
  <mapping>
    <aID isKey="true">GHI</aID>
    <bID isKey="true">PFP</bID>
    <SubAccount>MS</SubAccount>
    <!-- I want to add a new node here, how can I do this  -->
  </mapping>
  <mapping>
    <aID isKey="true">MNO</aID>
    <bID isKey="true">BBG</bID>
    <SubAccount>MAX</SubAccount>
  </mapping>
</mappings>

我想添加一个新节点，如上述 XML 中所述。我尝试了很多，但我没有成功。

XmlDocument xDoc = new XmlDocument();
xDoc.Load(filename);
foreach (XmlNode node in xmlDoc.SelectNodes("/mappings/mapping"))
{
    if (boothIDNode.InnerXml == BoothID)
    {
        chkBoothIDExists = true;
        if (clientIDNode.InnerText == ClientID)
        {
            chkClientIDExists = true;
            for (int j = 2; j < nodelist.Count; j++)
            {
                columnNode = nodelist[j];
                if (columnNode.Name == column.ToString())
                {
                    XmlNode elm = xDoc.CreateNode(XmlNodeType.Element,"Account",null);
                    elm.InnerText = value.ToString();                                                                                 
                    node.AppendChild(elm);  //  Error comes here 
                }
            }
        }
    }   
}
xmlDoc.Save(filename);

问题解决了。问题是由于我的愚蠢错误而发生的。基本上有两个xml文档，我正在创建其他xml文档的新节点，因此出现了错误。谢谢大家， XmlDocument xDoc = new XmlDocument（）; XmlDocument xmlDoc = new XmlDocument（）;

错误：要插入的节点来自不同的文档上下文

在添加新的 XML 节点时需要帮助

使用这样的东西，不是 c# 人，但这应该会有所帮助。我认为插入之后是您需要的：

  XmlNode currNode = xDoc.SelectNodes("/mappings/mapping");  
  XmlNode elm = xDoc.CreateNode(XmlNodeType.Element,"Account",null);
  currNode.InsertAfter(elm, currNode.LastChild);

为了添加节点，请考虑以下示例：

              XDocument a = XDocument.Parse(@"<?xml version=""1.0"" encoding=""utf-8""?>
<mappings>
  <mapping>
    <aID iskey="true">ABC</aID>
    <bID iskey="true">FPP</bID>
    <SubAccount>PS</SubAccount>
    <Account>PS</Account>
  </mapping>
  <mapping>
    <aID isKey="true">GHI</aID>
    <bID isKey="true">PFP</bID>
    <SubAccount>MS</SubAccount>
    <!-- I want to add a new node here, how can I do this  -->
  </mapping>
  <mapping>
    <aID isKey="true">MNO</aID>
    <bID isKey="true">BBG</bID>
    <SubAccount>MAX</SubAccount>
  </mapping>
</mappings>");
a.Descendants("mapping").Skip(1).First().Add(new XElement("aaa", new XAttribute("id", 1)));

--->

      <mappings>
  <mapping>
    <aID iskey="true">ABC</aID>
    <bID iskey="true">FPP</bID>
    <SubAccount>PS</SubAccount>
    <Account>PS</Account>
  </mapping>
  <mapping>
    <aID isKey="true">GHI</aID>
    <bID isKey="true">PFP</bID>
    <SubAccount>MS</SubAccount>
    <!-- I want to add a new node here, how can I do this  -->
    <aaa id="1" />
  </mapping>
  <mapping>
    <aID isKey="true">MNO</aID>
    <bID isKey="true">BBG</bID>
    <SubAccount>MAX</SubAccount>
  </mapping>
</mappings>

XDocument doc = XDocument.Load(filepath); // filepath is string
doc.Element(firstnodename).SetElementValue(descendantname,newvalue); //names and value are string
doc.Save(filepath); // This line optional. And filepath like : @"C:'Users'user'desktop'a.xml" or "C:''Users''user''desktop''a.xml". You should write with ".

你可以写更长.元素外汇：

doc.Element(firstnode).Element(secondnode).Element(thirdnode).SetElementValue(fourthnode,valueoffourth);
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