C#-XML文件的一些常用操作

记录一些常用的操作XML文档的方法，XML示例文档如下：

<?xml version="1.0" encoding="utf-8"?>
<Animal>
  <Dog Sound="WangWang" Favor="Bone" />
  <Cat Sound="MiaoMiao" Favor="Fish" />
</Animal>

命名空间：using System.Xml;

1.通过XmlTextWriter创建文档：

 1         public static void WriteByWriter()
 2         {
 3             XmlTextWriter tw = new XmlTextWriter(path,Encoding.UTF8);
 4             tw.Formatting = Formatting.Indented;
 5             tw.WriteStartDocument();
 6             tw.WriteStartElement("Animal");
 7             /////////
 8             tw.WriteStartElement("Dog");
 9             tw.WriteAttributeString("Sound","WangWang");
10             tw.WriteStartAttribute("Favor");
11             tw.WriteString("Bone");
12             tw.WriteEndAttribute();
13             tw.WriteEndElement();
14             /////////
15             tw.WriteStartElement("Cat");
16             tw.WriteAttributeString("Sound", "MiaoMiao");
17             tw.WriteStartAttribute("Favor");
18             tw.WriteString("Fish");
19             tw.WriteEndAttribute();
20             tw.WriteEndElement();
21             ///////////
22             tw.WriteEndElement();
23             tw.WriteEndDocument();
24             tw.Flush();
25         }
WriteByWrite

2.通过XmlDocument创建文档：

 1         public static void WritebyXmlDoc()
 2         {
 3             XmlDocument doc = new XmlDocument();
 4             doc.AppendChild(doc.CreateXmlDeclaration("1.0", "utf-8", null));
 5             XmlElement rootNode = doc.CreateElement("Animal");
 6             doc.AppendChild(rootNode);
 7 
 8             XmlElement subNode = doc.CreateElement("Dog");
 9             rootNode.AppendChild(subNode);
10             subNode.SetAttribute("Sound", "WangWang");
11             subNode.SetAttribute("Favor", "Bone");
12 
13             subNode = doc.CreateElement("Cat");
14             rootNode.AppendChild(subNode);
15             subNode.SetAttribute("Sound", "MiaoMiao");
16             subNode.SetAttribute("Favor", "Fish");
17             doc.Save(path);
18         }
WritebyXmlDoc

3.通过字符串创建文档：

 1          public static void WritebyString()
 2         {
 3             StringBuilder sb = new StringBuilder();
 4             sb.Append("<?xml version=\"1.0\" encoding=\"utf-8\"?>");
 5             sb.Append("<Animal>");
 6             sb.Append("<Dog Sound=\"WangWang\" Favor=\"Bone\"/>");
 7             sb.Append("<Cat Sound=\"MiaoMiao\" Favor=\"Fish\"/>");
 8             sb.Append("</Animal>");
 9             XmlDocument doc = new XmlDocument();
10             doc.LoadXml(sb.ToString());
11             doc.Save(path);
12         }
WritebyString

4.通过XmlDocument读取文档：

 1         public static void ReadByXmlDoc()
 2         {
 3             XmlDocument doc = new XmlDocument();
 4             doc.Load(path);
 5             XmlNode rootNode = doc.SelectSingleNode("Animal");
 6             XmlNodeList nodeList = rootNode.ChildNodes;
 7             foreach (XmlNode node in nodeList)
 8             {
 9                 Console.WriteLine(node.Name);//节点名称
10                 Console.WriteLine(node.Attributes[0].Value);//属性值
11                 Console.WriteLine(node.Attributes["Sound"].Value);//属性值
12                 foreach (XmlAttribute attr in node.Attributes)
13                 {
14                     //获取属性名称及值
15                     Console.WriteLine(attr.Name + " " + attr.Value);
16                 }
17             }
18         }
ReadByXmlDoc

5.通过XmlTextReader读取文档：

 1         public static void ReadByReader()
 2         {
 3             XmlDocument doc = new XmlDocument();
 4             doc.Load(path);
 5             //XmlTextReader reader = new XmlTextReader(path);
 6             XmlTextReader reader = new XmlTextReader(new StringReader(doc.OuterXml));
 7             reader.WhitespaceHandling = WhitespaceHandling.None;
 8             reader.ReadToFollowing("Animal");
 9             reader.ReadToFollowing("Dog");
10             if (reader.HasAttributes)
11             {
12                 Console.WriteLine(reader.GetAttribute(0));
13                 Console.WriteLine(reader.GetAttribute("Favor"));
14             } 
15             reader.ReadToFollowing("Cat");
16             if (reader.HasAttributes)
17             {
18                 Console.WriteLine(reader.GetAttribute(0));
19                 Console.WriteLine(reader.GetAttribute("Favor"));
20             }
21             reader.Close();
22         }
ReadByReader

6.编辑Xml文档：

 1         public static void Modify()
 2         {
 3             XmlDocument doc = new XmlDocument();
 4             doc.Load(path);
 5             XmlNode node = doc.SelectSingleNode("Animal/Dog");
 6             node.Attributes["Sound"].Value = "WoW!!!";//修改属性
 7             XmlNode root = doc.SelectSingleNode("Animal");
 8             XmlElement dog = root.ChildNodes[0] as XmlElement;
 9             dog.SetAttribute("Sound", "Wang!!");//添加或修改属性
10             dog.RemoveAttribute("Favor");//移除属性
11             XmlNode cat = root.ChildNodes[1];
12             XmlElement newNode = doc.CreateElement("Tigger");
13             newNode.SetAttribute("Sound", "OwOw!");
14             root.ReplaceChild(newNode, cat);//替换节点
15             doc.Save(path);
16         }
Modify

 7.重命名节点(复制节点)：

 1         public static void Replace()
 2         {
 3             XmlDocument doc = new XmlDocument();
 4             doc.Load("D:\\123.xml");
 5             XmlNode node = doc.SelectSingleNode("Root/SubNode");
 6             XmlElement ele = doc.CreateElement("NewNode");
 7             ele.InnerXml = node.InnerXml;
 8             foreach (XmlAttribute att in node.Attributes)
 9                 ele.SetAttribute(att.Name, att.Value);
10             node.ParentNode.AppendChild(ele);
11             node.ParentNode.RemoveChild(node);
12             doc.Save("D:\\123.xml");
13         }
View Code

 

　　

posted @ 2023-01-12 14:48  [春风十里]  阅读(32)  评论(0)  编辑  收藏  举报