c# – 使用XmlWriter附加现有XML文件

发布时间：2020-12-15 18:24:36 所属栏目：百科来源：网络整理

导读：我使用以下代码来创建 XML文件： XmlWriterSettings xmlWriterSettings = new XmlWriterSettings();xmlWriterSettings.Indent = true;xmlWriterSettings.NewLineOnAttributes = true;using (XmlWriter xmlWriter = XmlWriter.Create("Test.xml",xmlWriterSet

我使用以下代码来创建 XML文件：

XmlWriterSettings xmlWriterSettings = new XmlWriterSettings();
xmlWriterSettings.Indent = true;
xmlWriterSettings.NewLineOnAttributes = true;
using (XmlWriter xmlWriter = XmlWriter.Create("Test.xml",xmlWriterSettings))
{
   xmlWriter.WriteStartDocument();
   xmlWriter.WriteStartElement("School");
   xmlWriter.WriteEndElement();
   xmlWriter.WriteEndDocument();
   xmlWriter.Close();
 }

我需要动态插入节点,创建以下结构：

<?xml version="1.0" encoding="utf-8"?>
<School />
   <Student>
      <FirstName>David</FirstName>
      <LastName>Smith</LastName>
   </Student>
   ...
   <Teacher>
      <FirstName>David</FirstName>
      <LastName>Smith</LastName>
   </Teacher>
   ...
</School>

我该怎么做？应从键盘读取“FirstName”和“LastName”的值,并且可以随时输入值,当然在现有值下.

解决方法

你可以使用Linq Xml

XDocument doc = XDocument.Load(xmlFilePath);
XElement school = doc.Element("School");
school.Add(new XElement("Student",new XElement("FirstName","David"),new XElement("LastName","Smith")));
doc.Save(xmlFilePath);

编辑

如果要将Element添加到Existing< Student>,只需添加一个Attribute

school.add(new XElement("Student",new XAttribute("ID","ID_Value"),"Smith")));

然后,您可以向现有< Student>添加更多详细信息.通过搜索 – >得到 – >加

XElement particularStudent = doc.Element("School").Elements("Student")
                                .Where(student => student.Attribute("ID").Value == "SearchID")
                                .FirstOrDefault();
if(particularStudent != null)
    particularStudent.Add(new XElement("<NEwElementName>","<Value>");

（编辑：李大同）

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