demo:

  1. XmlDocument doc = new XmlDocument();
  2. XmlDeclaration dec = doc.CreateXmlDeclaration("1.0", "GB2312", null);
  3. doc.AppendChild(dec);
  4. //创建一个根节点（一级）
  5. XmlElement root = doc.CreateElement("First");
  6. doc.AppendChild(root);
  7. //创建节点（二级）
  8. XmlNode node = doc.CreateElement("Seconde");
  9. //创建节点（三级）
  10. XmlElement element1 = doc.CreateElement("Third1");
  11. element1.SetAttribute("Name", "Sam");
  12. element1.SetAttribute("ID", "665");
  13. element1.InnerText = "Sam Comment";
  14. node.AppendChild(element1);
  16. XmlElement element2 = doc.CreateElement("Third2");
  17. element2.SetAttribute("Name", "Round");
  18. element2.SetAttribute("ID", "678");
  19. element2.InnerText = "Round Comment";
  20. node.AppendChild(element2);
  24. root.AppendChild(node);
  25. doc.Save(@"d:\bb.xml");
  26. Console.Write(doc.OuterXml);

 格式化输出函数：

  1. private static string formatXml(object xml){
  2.     XmlDocument xd;
  3.     if(xml is XmlDocument) {
  4.         xd=xml as XmlDocument;
  5.     }else{ 
  6.         xd = new XmlDocument();
  7.         xd.LoadXml(xml as string);
  8.     }
  9.     StringBuilder sb = new StringBuilder();
  10.     StringWriter sw = new StringWriter(sb);  
  11.     XmlTextWriter xtw = null;  
  12.     try{  
  13.         xtw = new XmlTextWriter(sw);  
  14.         xtw.Formatting = Formatting.Indented;  
  15.         xtw.Indentation = 1;  
  16.         xtw.IndentChar = \'\t\';  
  17.         xd.WriteTo(xtw);  
  18.     }finally{  
  19.         if (xtw != null)  
  20.             xtw.Close();  
  21.     }  
  22.     return sb.ToString();
  23. }

 

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