XML文件帮助类

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
using System.Data;
using System.IO;
using System.Windows.Forms;

//modify 2013-08-21 weiyj 修改XML文件格式
namespace yjs_cl_seq
{
    class XMLHelper
    {
        public void createXml(string DocTitle, string path, DataTable sampTable, DataTable zfTable, string CurrentUserName, string netUser, string netPwd, string netIP)
        {
            try
            {
                path = path + @"" + CurrentUserName;
                try
                {
                    //访问的是网络路径
                    if (!string.IsNullOrEmpty(netUser) && !string.IsNullOrEmpty(netPwd) && !string.IsNullOrEmpty(netIP))
                    {
                        if (ConnectHelper.impersonateValidUser(netUser, netIP, netPwd) == false)
                        {
                            MessageBox.Show("网络路径不存在");
                            return;
                        }
                    }
                    //访问的是本地路径
                  
                    if (!Directory.Exists(path))
                    {
                        Directory.CreateDirectory(path);
                    }
                }
                catch (Exception ex)
                {
                    MessageBox.Show("访问路径错误" + ex.ToString());
                    return;
                }
                int indexID = 0;

                XmlTextWriter writer = new XmlTextWriter(path + @"" + DocTitle + "_" + DateTime.Now.ToString("yyyy-MM-dd hhmmssfff") + ".xml", null);
                //使用自动缩进便于阅读
                writer.Formatting = Formatting.Indented;
                //写入根元素
                //modify by weiyj 2013-08-22
                writer.WriteStartElement("Samples");
                if (sampTable != null && sampTable.Rows.Count > 0)
                {
                    for (int i = 0; i < sampTable.Rows.Count; i++)
                    {
                        int j = 1;
                        int.TryParse(sampTable.Rows[i]["进样次数"].ToString(), out j);

                        int k = 0;
                        while (k < j)
                        {
                            writer.WriteStartElement("Sample");
                            //写入属性及属性的名字
                            //加入子元素
                            //modify by weiyj 2013-08-21 修改XML文件格式                     
                            writer.WriteElementString("Number", (++indexID).ToString());
                            writer.WriteElementString("Location", "1");
                            writer.WriteElementString("Name", sampTable.Rows[i]["名称"].ToString());
                            writer.WriteElementString("CDSMethod", string.Empty);
                            writer.WriteElementString("numberOfInj", "1");
                            writer.WriteElementString("sampleType", "Standard");
                            writer.WriteElementString("CalLevel", string.Empty);
                            writer.WriteElementString("calibration", string.Empty);
                            writer.WriteElementString("UpdateRT", string.Empty);
                            writer.WriteElementString("Interval", string.Empty);
                            writer.WriteElementString("sampleAmount", string.Empty);
                            writer.WriteElementString("Multipliers", string.Empty);
                            writer.WriteElementString("Dilution", string.Empty);
                            writer.WriteElementString("DataFilename", string.Empty);
                            writer.WriteElementString("InjectionVolume", string.Empty);
                            writer.WriteElementString("description", string.Empty);
                            writer.WriteElementString("StudyName", string.Empty);
                            writer.WriteElementString("LimsID", sampTable.Rows[i]["别名"].ToString() + "/" + sampTable.Rows[i]["项目"].ToString() + "/" + sampTable.Rows[i]["称量次数"].ToString());
                            writer.WriteElementString("LimsKField2", sampTable.Rows[i]["项目编号"].ToString());
                            writer.WriteElementString("LimsKField3", "Standard");
                            //end by weiyj 2013-08-21
                            //关闭根元素，并书写结束标签      
                            writer.WriteEndElement();
                            k++;
                        }
                    }
                }

                if (zfTable != null && zfTable.Rows.Count > 0)
                {
                    for (int i = 0; i < zfTable.Rows.Count; i++)
                    {
                        int j = 1;
                        int.TryParse(zfTable.Rows[i]["进样次数"].ToString(), out j);

                        int k = 0;
                        while (k < j)
                        {
                            writer.WriteStartElement("Sample");
                            //写入属性及属性的名字
                            //加入子元素
                            //modify by weiyj 2013-08-21 修改XML文件格式                     
                            writer.WriteElementString("Number", (++indexID).ToString().ToString());
                            writer.WriteElementString("Location", "1");
                            writer.WriteElementString("Name", zfTable.Rows[i]["检品编号"].ToString());
                            writer.WriteElementString("CDSMethod", string.Empty);
                            writer.WriteElementString("numberOfInj", "1");
                            writer.WriteElementString("sampleType", "SAMPLE");
                            writer.WriteElementString("CalLevel", string.Empty);
                            writer.WriteElementString("calibration", string.Empty);
                            writer.WriteElementString("UpdateRT", string.Empty);
                            writer.WriteElementString("Interval", string.Empty);
                            writer.WriteElementString("sampleAmount", string.Empty);
                            writer.WriteElementString("Multipliers", string.Empty);
                            writer.WriteElementString("Dilution", string.Empty);
                            writer.WriteElementString("DataFilename", string.Empty);
                            writer.WriteElementString("InjectionVolume", string.Empty);
                            writer.WriteElementString("description", string.Empty);
                            writer.WriteElementString("StudyName", string.Empty);
                            writer.WriteElementString("LimsID", zfTable.Rows[i]["检品名称"].ToString() + "/" + zfTable.Rows[i]["项目"].ToString() + "/" + zfTable.Rows[i]["称量次数"].ToString());
                            writer.WriteElementString("LimsKField2", zfTable.Rows[i]["项目编号"].ToString());
                            writer.WriteElementString("LimsKField3", "Sample");
                            //end by weiyj 2013-08-21
                            //关闭根元素，并书写结束标签      
                            writer.WriteEndElement();
                            k++;
                        }
                    }
                }
                //end by weiyj 2013-08-22
                writer.WriteEndElement();
                //将XML写入文件并且关闭XmlTextWriter     
                writer.Close();
            }
            catch (Exception)
            {
                throw;
            }
        }

        public void addItem()
        {
            // XmlDocument xmlDoc = new XmlDocument();
            // xmlDoc.Load("titles.xml");
            // XmlNode root = xmlDoc.SelectSingleNode("items");
            // XmlElement xe1 = xmlDoc.createElement_x("item");
            // xe1.SetAttribute("类别", "张三");
            // xe1.SetAttribute("品质", "老师");
            // //XmlElement xmlsub1 = xmlDoc.createElement_x("title");
            // xmlsub1.InnerText = "wahahha"; xe1.AppendChild(xmlsub1);
            //// XmlElement xmlsub2 = xmlDoc.createElement_x("author");
            // xmlsub2.InnerText = "三毛";
            // xe1.AppendChild(xmlsub2);
            // //XmlElement xmlsub3 = xmlDoc.createElement_x("Price");
            // xmlsub3.InnerText = "15.00";
            // xe1.AppendChild(xmlsub3);
            // root.AppendChild(xe1);
            // xmlDoc.Save("titles.xml");
        }

        public void readtext()
        {
            XmlDocument xmlDoc = new XmlDocument(); xmlDoc.Load("titles.xml");
            XmlNode xn = xmlDoc.SelectSingleNode("items");
            XmlNodeList xnl = xn.ChildNodes; foreach (XmlNode xnf in xnl)
            {
                XmlElement xe = (XmlElement)xnf;
                Console.Write("类别  " + xe.GetAttribute("类别") + "     品质  ");//显示属性值                    Console.WriteLine(xe.GetAttribute("品质"));                    XmlNodeList xnf1 = xe.ChildNodes;                    foreach (XmlNode xn2 in xnf1)                    {
                //Console.WriteLine(xn2.InnerText);//显示子节点点文本                    }
                Console.WriteLine();
            }
        }

        public void updatexml()
        {
            XmlDocument xmlDoc = new XmlDocument();
            xmlDoc.Load("titles.xml");
            XmlNode xns = xmlDoc.SelectSingleNode("items");
            XmlNodeList xnl = xns.ChildNodes;
            foreach (XmlNode xn in xnl)
            {
                XmlElement xe = (XmlElement)xn;
                if (xe.GetAttribute("类别") == "文学")
                {
                    xe.SetAttribute("类别", "娱乐");
                }
                else
                {
                    xe.SetAttribute("类别", "文学");
                }
                XmlNodeList xnl2 = xe.ChildNodes; foreach (XmlNode xn2 in xnl2)
                {
                    XmlElement xe2 = (XmlElement)xn2; if (xe2.Name == "price")
                    {
                        if (xe2.InnerText == "10.00") xe2.InnerText = "15.00";
                        else
                            xe2.InnerText = "10.00";
                    }
                    xmlDoc.Save("titles.xml");
                    Console.WriteLine();
                    Console.WriteLine();
                    Console.WriteLine();
                    Console.WriteLine();
                    readtext();
                }
            }
        }

        public void delnode()
        {
            XmlDocument xmlDoc = new XmlDocument();
            xmlDoc.Load("titles.xml");
            XmlNodeList xnl = xmlDoc.SelectSingleNode("items").ChildNodes;
            foreach (XmlNode xn in xnl)
            {
                XmlElement xe = (XmlElement)xn;
                if (xe.GetAttribute("类别") == "文学")
                {
                    xe.RemoveAttribute("类别");//删除genre属性
                }
                else if (xe.GetAttribute("类别") == "娱乐")
                {
                    xe.RemoveAll();//删除该节点的全部内容
                }
            }
            xmlDoc.Save("titles.xml");
            Console.WriteLine();
            Console.WriteLine();
            Console.WriteLine();
            Console.WriteLine();
            readtext();
        }
    }
}