ADO.NET笔记（一）XML导入导出和数据库

数据导出成XML文件

#region 数据导出成XML文件
            string sql = "select Id, CallerNumber, TelNum, StartDateTime, EndDateTime from chens.CallRecords";
            XDocument xDoc = new XDocument();
            //创建根目录
            XElement person = new XElement("person");
            xDoc.Add(person);
            using (SqlConnection conn = new SqlConnection(sConstr))
            {
                using (SqlCommand cmd = new SqlCommand(sql, conn))
                {
                    conn.Open();
                    using (SqlDataReader sdr = cmd.ExecuteReader())
                    {
                        while (sdr.Read())
                        {
                            XElement caller = new XElement("caller");
                            for (int i = 0; i < sdr.FieldCount; i++)
                            {
                                caller.SetElementValue(sdr.GetName(i), sdr.GetValue(i).ToString());
                            }
                            person.Add(caller);
                        }
                    }
                }
            }
            xDoc.Save("person.xml");
            Console.WriteLine("数据导出完毕");
            Console.ReadKey();  
            #endregion

 2.将XML文件中的数据导入数据库

#region 将XML文件中的数据导入数据库
            string sql;
            XDocument xDoc = XDocument.Load("person.xml");
            using (SqlConnection conn=new SqlConnection(sConstr))
            {
                using (SqlCommand cmd=new SqlCommand())
                {
                    cmd.Connection = conn;
                    conn.Open();
                    //遍历每一个caller节点
                    foreach (XElement item in xDoc.Element("person").Elements("caller"))
                    {
                        int Id = Convert.ToInt32(item.Element("Id").Value);
                        string CallerNumber = item.Element("CallerNumber").Value;
                        string TelNum = item.Element("TelNum").Value;
                        DateTime StartDateTime = Convert.ToDateTime(item.Element("StartDateTime").Value);
                        DateTime EndDateTime = Convert.ToDateTime(item.Element("EndDateTime").Value);

                        sql = string.Format("insert into chens.CallRecords(Id, CallerNumber, TelNum, StartDateTime, EndDateTime)values({0},'{1}','{2}','{3}','{4}')", Id, CallerNumber, TelNum, StartDateTime, EndDateTime);

                        cmd.CommandText = sql;
                        //将得到的值更新回数据库
                        cmd.ExecuteNonQuery();
                    }
                }
            }
            Console.WriteLine("数据导入完毕");
            Console.ReadKey();
            #endregion