用c#写XML文件问题

Question

 请高手帮我用c#写一个像下面格式的XML文件： <?xml version="1.0" encoding="GBK" ?> 
- <result>  <authentication>true</authentication>   <userrole>student</userrole>   </result>

Answer 1

XmlWriter xw=XmlWriter("x.xml");
xw.WriteStartElement("result")
xw.WriteElementString("authentication","true");
xw.WriteElementString("userrole","student");
xw.WriteEndElement();xw.Flush();
xw.Close();

Answer 2

private void button2_Click(object sender, EventArgs e)
        {
            XmlWriterSettings settings = new XmlWriterSettings();
            settings.Indent = true;
            settings.Encoding = Encoding.GetEncoding("gbk");//只能得到 gb2312
            XmlWriter writer = XmlWriter.Create("test.xml", settings);
            writer.WriteStartDocument();
            writer.WriteStartElement("result");            writer.WriteStartElement("authentication");
            writer.WriteString("true");
            writer.WriteEndElement();            writer.WriteStartElement("userrole");
            writer.WriteString("student");
            writer.WriteEndElement();            writer.WriteEndElement();
            writer.WriteEndDocument();
            writer.Close();
        }
文件内容:<?xml version="1.0" encoding="gb2312"?>
<result>
  <authentication>true</authentication>
  <userrole>student</userrole>
</result>

Answer 3

 #region 创建
        public static bool CreatXml(string fileName)
        {
            try
            {
                if (!File.Exists( fileName))
                {                    
                    XmlTextWriter textWriter = new XmlTextWriter(fileName, null);
                    //-------创建XML写操作对象
                    textWriter.Formatting = Formatting.Indented;
                    //-------开始写过程，调用WriteStartDocument方法
                    textWriter.WriteStartDocument();
                    //-------写入说明
                    //textWriter.WriteComment("this XML is created from a tree");
                    //-------添加第一个根节点
                    textWriter.WriteStartElement("rootNode");
                    textWriter.WriteEndElement();
                    //------ 写文档结束，调用WriteEndDocument方法
                    textWriter.WriteEndDocument();
                    //-----关闭输入流
                    textWriter.Close();
                }       
            }
            catch (Exception ex)
            {                
                throw new Exception(ex.Message);                
            }
            return true;
        }
        #endregion#region 写入
        public static bool WriteXml(string key, string value, string fileName)
        {
            XmlDocument xmldoc = new XmlDocument();
            XmlElement root;
            try
            {
                xmldoc.Load( fileName);
                root = xmldoc.DocumentElement;
                foreach (XmlNode item in root.ChildNodes)
                {
                    if (item.ChildNodes[0].InnerXml==key)
                    {
                        item.ChildNodes[1].InnerXml = value;
                        break;
                    }
                }
                xmldoc.Save( fileName);                
            }
            catch (System.Exception ex)
            {
                throw new Exception(ex.Message);
            }
            return true;
        }
        #endregion
#region 读取
        public static string ReadXml(string keys, string fileName)
        {            XmlDocument xmldoc = new XmlDocument();
            XmlElement root;
            xmldoc.Load(fileName);
            root = xmldoc.DocumentElement;
            foreach (XmlNode item in root.ChildNodes)
            {
                if (item.ChildNodes[0].InnerXml == keys)
                {                    
                    return item.ChildNodes[1].InnerXml;
                }
            }
            return "";
        }
        #endregion

Answer 4

#region 添加节点
        public static void AddXmlNode(string text, string value, string fileName)
        {
            XmlDocument xmldoc = new XmlDocument();
            XmlElement root;
            xmldoc.Load( fileName);
            root = xmldoc.DocumentElement;
            XmlElement subNode = xmldoc.CreateElement("subNode");
            XmlElement nodeName = xmldoc.CreateElement("nodeName");
            XmlElement nodeTag = xmldoc.CreateElement("nodeTag");
            nodeName.InnerXml = text;
            nodeTag.InnerXml = value;
            subNode.AppendChild(nodeName);
            subNode.AppendChild(nodeTag);
            root.AppendChild(subNode);
            xmldoc.Save( fileName);        }
        #endregion        #region 删除节点
        public static void DelXmlNode(string text, string value, string fileName)
        {
            XmlDocument xmldoc = new XmlDocument();
            XmlElement root;
            xmldoc.Load(fileName);
            root = xmldoc.DocumentElement;
            foreach (XmlNode item in root.ChildNodes)
            {
                if (item.ChildNodes[0].InnerXml==text&&item.ChildNodes[1].InnerXml==value)
                {
                    root.RemoveChild(item);
                    break;
                }
            }
            xmldoc.Save(fileName);
        }
        #endregion

Answer 5

可以用序列化的方式生产xml啊。给实体类加标签属性啊。

Answer 6

        string path = Application.StartupPath + "\\MyXml.xml";
        if (!File.Exists(path))  //不存在文件创建
        {
          XmlDocument xml = new XmlDocument();
          XmlDeclaration dec = xml.CreateXmlDeclaration("1.0", "UTF-8", null);
          xml.AppendChild(dec);
          XmlNode rootnode = xml.CreateNode(XmlNodeType.Element, "result", "");
          xml.AppendChild(rootnode); //添加跟节点 
            XmlNode childnode1 = xml.CreateNode(XmlNodeType.Element, "authentication", "");  
          childnode1.InnerText = "true";        
          rootnode.AppendChild(childnode1);
          XmlNode childnode2 = xml.CreateNode(XmlNodeType.Element, "userrole", "");  
          childnode2.InnerText = "student";        
          rootnode.AppendChild(childnode2);
          xml.Save(path);
        }