csharp: read xml

  //
                string xmldata = AppDomain.CurrentDomain.BaseDirectory.ToString() + @"xml涂聚文.xml";
                XElement xe = XElement.Load(xmldata);
                IEnumerable<XElement> element = from ele in xe.Elements("dataserver")
                                               // where ele.Attribute("id").Value == "1"
                                           select ele;

                if (element.Count() > 0)
                {
                    List<ServerConfig> infos=showInfoByElements(element);
                }

                XmlDocument xmlDoc = new XmlDocument();
                xmlDoc.Load(xmldata);
                XmlElement xed = xmlDoc.DocumentElement; // DocumentElement 获取xml文档对象的根XmlElement.
                string strPath = string.Format("/ServerConfig/dataserver[@id="{0}"]", "1");
                XmlElement selectXe = (XmlElement)xed.SelectSingleNode(strPath);  //selectSingleNode 根据XPath表达式,获得符合条件的第一个节点.

                XmlNodeList elementdd = selectXe.ChildNodes;


                XmlNodeList senode = xed.SelectSingleNode(strPath).ChildNodes;
                foreach (XmlNode childNode in senode)
                {
                    XmlElement childElement = (XmlElement)childNode;
                    string ddd = childElement.InnerText;// childElement.GetAttribute("database");
                    string ddt = childNode.InnerText;

                }  
                foreach (XmlNode ee in selectXe.ChildNodes)
                {
                  
                        string dd = ee.InnerText;                    
                }

                MessageBox.Show("連接塗聚文成功", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);

　　

    /// <summary>
        /// 
        /// </summary>
        /// <param name="elements"></param>
        private List<ServerConfig> showInfoByElements(IEnumerable<XElement> elements)
        {
            List<ServerConfig> modelList = new List<ServerConfig>();
            List<Databases> dslist=null;
            foreach (var ele in elements)
            {

                dslist = new List<Databases>();
                ServerConfig model = new ServerConfig();
                model.id = ele.Attribute("id").Value;// ele.Element("id").Value;
                model.server = ele.Attribute("server").Value; //ele.Element("server").Value;
                model.setdatabase = ele.Attribute("setdatabase").Value;// ele.Element("setdatabase").Value;
                model.user = ele.Attribute("user").Value;
                model.password = ele.Attribute("password").Value;
                model.database = ele.Element("database").Value;

                string xmldata = AppDomain.CurrentDomain.BaseDirectory.ToString() + @"xmlgeovindu.xml";
                XmlDocument xmlDoc = new XmlDocument();
                xmlDoc.Load(xmldata);
                XmlElement xed = xmlDoc.DocumentElement; // DocumentElement 获取xml文档对象的根XmlElement.
                string strPath = string.Format("/ServerConfig/dataserver[@id="{0}"]", model.id);
                XmlElement selectXe = (XmlElement)xed.SelectSingleNode(strPath);  //selectSingleNode 根据XPath表达式,获得符合条件的第一个节点.
                XmlNodeList elementdd = selectXe.ChildNodes;

                XmlNodeList senode = xed.SelectSingleNode(strPath).ChildNodes;
                foreach (XmlNode childNode in senode)
                {
                    XmlElement childElement = (XmlElement)childNode;
                    string ddd = childElement.InnerText;// childElement.GetAttribute("database");
                    string ddt = childNode.InnerText;
                    Databases inf = new Databases();
                    inf.database = childElement.InnerText;
                    dslist.Add(inf);

                }
                foreach (XmlNode ee in selectXe.ChildNodes)
                {

                    string dd = ee.InnerText;
                }

                model.ListData = dslist;
                modelList.Add(model);

            }                
            return modelList;
        }

　　

    /// <summary>
    /// 
    /// </summary>
    public class ServerConfig
    {
        /// <summary>
        /// 
        /// </summary>
        public string id { get; set; }
        /// <summary>
        /// 
        /// </summary>
        public string server  { get; set; }
        /// <summary>
        /// 
        /// </summary>
        public string setdatabase  { get; set; }
        /// <summary>
        /// 
        /// </summary>
        public string user  { get; set; }
        /// <summary>
        /// 
        /// </summary>
        public string password  { get; set; }
        /// <summary>
        /// 
        /// </summary>
        public string database  { get; set; }
        /// <summary>
        ///一个服务器下，多个数据 数据库名称列表
        /// </summary>
        public List<Databases> ListData { get; set; }

    }
    /// <summary>
    /// 数据库名称类
    /// </summary>
    public class Databases
    {
        /// <summary>
        /// 数据库名称
        /// </summary>
        public string database { get; set; }

    }

　XML:

<?xml version="1.0" encoding="utf-8"?>
<ServerConfig>
  <dataserver server="GEOVINDU" setdatabase="GeovinDu" user="geovindu" password="涂聚文" id="1">
    <database>塗聚文 Geovin Du</database>
  </dataserver>
</ServerConfig>

　

     bool isok=ConnectionTestInfo.ConnectionTest(combServer.Text, combDatabase.Text, this.txtbUser.Text.Trim(), this.txtbPassword.Text.Trim());
            if (isok)
            {
                string newdata = string.Empty;
                string newserver = string.Empty;
                //考虑没有进行添加
                xmldatafile = AppDomain.CurrentDomain.BaseDirectory.ToString() + @"xml涂聚文 Geovin Du.xml";
                xmlserverfile = AppDomain.CurrentDomain.BaseDirectory.ToString() + @"xml塗聚文Geovin Du.xml";
               XElement xedata = XElement.Load(xmldatafile);
               //IEnumerable<XElement> xdedata = xedata;
               IEnumerable<XElement> element = from ele in xedata.Elements("dataserver")
                                               where ele.Attribute("id").Value == "1"
                                               select ele;
               bool exists = false;
               List<string> lis = new List<string>();

               if (element.Count() > 0)
               {
                   foreach (var ele in element)
                   {
                       if (!object.Equals(ele.Element("database"), null))
                       {
                           //lis.Add(ele.Element("database").Value);       //只查了第一条
                           XmlDocument xmlDoc = new XmlDocument();
                           xmlDoc.Load(xmldatafile);
                           XmlElement xed = xmlDoc.DocumentElement; // DocumentElement 获取xml文档对象的根XmlElement.
                           string strPath = string.Format("/ServerConfig/dataserver[@id="{0}"]", ele.Attribute("id").Value); //eles.Element("server").Value
                           XmlElement selectXe = (XmlElement)xed.SelectSingleNode(strPath);  //selectSingleNode 根据XPath表达式,获得符合条件的第一个节点.
                           XmlNodeList elementdd = selectXe.ChildNodes;
                           XmlNodeList senode = xed.SelectSingleNode(strPath).ChildNodes;
                           foreach (XmlNode childNode in senode)
                           {
                               XmlElement childElement = (XmlElement)childNode;
                               string ddd = childElement.InnerText;// childElement.GetAttribute("database");
                               string ddt = childNode.InnerText;
                               lis.Add(childElement.InnerText);
                              

                           }
                           foreach (XmlNode ee in selectXe.ChildNodes)
                           {

                               string dd = ee.InnerText;
                           }

                       }


                   }
                   exists = lis.Contains(combDatabase.Text.Trim());
                   if (lis.Count > 0)
                   {                   
                           newdata = combDatabase.Text.Trim();
                           if (!exists)
                           {
                               XmlDocument doc = new XmlDocument();
                               doc.Load(xmldatafile);
                               XmlNode root = doc.SelectSingleNode("ServerConfig");
                               XmlElement xelAuthor = doc.CreateElement("database");
                               xelAuthor.InnerText = newdata;
                               string strPath = string.Format("/ServerConfig/dataserver[@id="{0}"]", "1");
                               XmlElement xelKey = (XmlElement)doc.SelectSingleNode(strPath); //doc.SelectSingleNode("");
                               xelKey.AppendChild(xelAuthor);
                               doc.Save(xmldatafile);
                           }
                    }
                   else
                   {
                       XmlDocument doc = new XmlDocument();
                       doc.Load(xmldatafile);
                       XmlNode root = doc.SelectSingleNode("ServerConfig");
                       XmlElement xelAuthor = doc.CreateElement("database");
                       xelAuthor.InnerText = combDatabase.Text.Trim(); 
                       string strPath = string.Format("/ServerConfig/dataserver[@id="{0}"]", "1");
                       XmlElement xelKey = (XmlElement)doc.SelectSingleNode(strPath); //doc.SelectSingleNode("");
                       xelKey.AppendChild(xelAuthor);
                       doc.Save(xmldatafile);
                   }
               }
               else
               {
                   newdata = combDatabase.Text.Trim();
                   XmlDocument doc = new XmlDocument();
                   doc.Load(xmldatafile);
                   XmlNode root = doc.SelectSingleNode("ServerConfig");
                   XmlElement xelAuthor = doc.CreateElement("database");
                   xelAuthor.InnerText = newdata;
                   string strPath = string.Format("/ServerConfig/dataserver[@id="{0}"]", "1");
                   XmlElement xelKey = (XmlElement)doc.SelectSingleNode(strPath); //doc.SelectSingleNode("");
                   xelKey.AppendChild(xelAuthor);
                   doc.Save(xmldatafile);
               }


               lis = new List<string>();
                //操作
               XElement xeserver = XElement.Load(xmlserverfile);
               IEnumerable<XElement> eleserver = from eles in xeserver.Elements("dataserver")
                                               where eles.Attribute("id").Value == "1"
                                               select eles;
               if (eleserver.Count() > 0)
               {
                   foreach (var eles in eleserver)
                   {
                       if (!object.Equals(eles.Element("server"), null))
                       {
                          // lis.Add(eles.Element("server").Value);  //只查了第1条
                           XmlDocument xmlDoc = new XmlDocument();
                           xmlDoc.Load(xmlserverfile);
                           XmlElement xed = xmlDoc.DocumentElement; // DocumentElement 获取xml文档对象的根XmlElement.
                           string strPath = string.Format("/ServerConfig/dataserver[@id="{0}"]", eles.Attribute("id").Value);   //eles.Element("server").Value
                           XmlElement selectXe = (XmlElement)xed.SelectSingleNode(strPath);  //selectSingleNode 根据XPath表达式,获得符合条件的第一个节点.
                           XmlNodeList elementdd = selectXe.ChildNodes;
                           XmlNodeList senode = xed.SelectSingleNode(strPath).ChildNodes;
                           foreach (XmlNode childNode in senode)
                           {
                               XmlElement childElement = (XmlElement)childNode;
                               string ddd = childElement.InnerText;// childElement.GetAttribute("database");
                               string ddt = childNode.InnerText;
                               lis.Add(childElement.InnerText);


                           }
                           foreach (XmlNode ee in selectXe.ChildNodes)
                           {

                               string dd = ee.InnerText;
                           }


                       }

                   }
                   exists = false;
                   if (lis.Count > 0)
                   {


                       exists = lis.Contains(combServer.Text.Trim());
                       newserver = combServer.Text.Trim();
                       if (!exists)
                       {
                           XmlDocument doc = new XmlDocument();
                           doc.Load(xmlserverfile);
                           XmlNode root = doc.SelectSingleNode("ServerConfig");
                           XmlElement xelAuthor = doc.CreateElement("server");
                           xelAuthor.InnerText = newserver;
                           string strPath = string.Format("/ServerConfig/dataserver[@id="{0}"]", "1");
                           XmlElement xelKey = (XmlElement)doc.SelectSingleNode(strPath); //doc.SelectSingleNode("");
                           xelKey.AppendChild(xelAuthor);
                           doc.Save(xmlserverfile);
                       }
                   }
                   else
                   {
                       XmlDocument doc = new XmlDocument();
                       doc.Load(xmlserverfile);
                       XmlNode root = doc.SelectSingleNode("ServerConfig");
                       XmlElement xelAuthor = doc.CreateElement("server");
                       xelAuthor.InnerText = combServer.Text.Trim();
                       string strPath = string.Format("/ServerConfig/dataserver[@id="{0}"]", "1");
                       XmlElement xelKey = (XmlElement)doc.SelectSingleNode(strPath); //doc.SelectSingleNode("");
                       xelKey.AppendChild(xelAuthor);
                       doc.Save(xmlserverfile);
                   }

               }
               else
               {
                   newserver = combServer.Text.Trim();
                   XmlDocument doc = new XmlDocument();
                   doc.Load(xmlserverfile);
                   XmlNode root = doc.SelectSingleNode("ServerConfig");
                   XmlElement xelAuthor = doc.CreateElement("server");
                   xelAuthor.InnerText = newserver;
                   string strPath = string.Format("/ServerConfig/dataserver[@id="{0}"]", "1");
                   XmlElement xelKey = (XmlElement)doc.SelectSingleNode(strPath); //doc.SelectSingleNode("");
                   xelKey.AppendChild(xelAuthor);
                   doc.Save(xmlserverfile);
               }



                MessageBox.Show("連i涂聚文成功", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
            else
            {
                MessageBox.Show("没有找到涂聚文,重来一次", "提示", MessageBoxButtons.OK, MessageBoxIcon.Question);
                return;
            }

//指定修改值

           SchemasNameListInfo info=model.schemaname(this.txtbUser.Text.Trim(), this.txtConnection.Text.Trim());
            SchemasNameInfo.SchemasName = info.SchemaName;
            bool ok= model.CreateFun(combDatabase.Text.ToString().Trim(),serverstr);
            if (ok)
            {
                xmlfile = AppDomain.CurrentDomain.BaseDirectory.ToString() + @"xml涂聚文.xml";
               //edit xml
                XElement xe = XElement.Load(xmlfile);
                if (info.DatabaseName != null)
                {
                    //dgvBookInfo.CurrentRow.Cells[1]对应着ISBN号
                    string id = "1";
                    IEnumerable<XElement> element = from ele in xe.Elements("dataserver")
                                                    where ele.Attribute("id").Value == id
                                                    select ele;
                    if (element.Count() > 0)
                    {
                        XElement first = element.First();
                        ///设置新的属性
                        first.SetAttributeValue("server", combServer.Text.ToString().Trim());
                        first.SetAttributeValue("database", combDatabase.Text.ToString().Trim());
                        first.SetAttributeValue("user", txtbUser.Text.ToString().Trim());
                        first.SetAttributeValue("password", txtbPassword.Text.ToString().Trim());
                        ///替换新的节点
                        first.ReplaceNodes(
                                  new XElement("server", combServer.Text.ToString().Trim()),
                                new XElement("database", combDatabase.Text.ToString().Trim()),
                                  new XElement("user", txtbUser.Text.Trim()),
                                   new XElement("password", txtbPassword.Text.Trim())
                                 );
                    }
                    xe.Save(xmlfile);
                }
         
                MessageBox.Show("配置涂聚文成功！");
            }
            else
            {
                MessageBox.Show("配置涂聚文不成功！");
            }