浅试txt文件与xml文件互相转换

                    SqlConnection conn = new SqlConnection();     //  省略
                    string sql = "select * from valLogin";
                    SqlCommand cmd = new SqlCommand(sql,conn);            //  省略
                    using (SqlDataReader reader = cmd.ExecuteReader())
                    {
                        if (!reader.HasRows)
                        {
                            Console.WriteLine("没有数据.");
                        }
                        else
                        {
                            using (StreamWriter writer = new StreamWriter(@"D:/tab.txt"))
                            {
                                StringBuilder builder = new StringBuilder(); ;
                                while (reader.Read())
                                {
                                    for (int i = 0; i < reader.FieldCount; i++)
                                    {
                                        Console.Write(reader.GetValue(i) + "\t");

                                        string line = string.Format("{0}", reader.GetValue(i));
                                        builder.AppendFormat("{0}", line + ",");

                                    }
                                    writer.WriteLine(builder);
                                    builder.Clear();
                                    Console.WriteLine();
                                }
                               
                                Console.WriteLine("导出成功!请按任意键,把导出的txt文件转换成xml文件.");
                                Console.ReadKey();
                            }
                        }
                    }

                这一步我们就把数据表中的数据导出到txt文件中了，没什么难点。

// 定义一个字典集合，方便用。

Dictionary<int, string> dic = new Dictionary<int, string>();
dic.Add(0, "编号");
dic.Add(1, "名称");
dic.Add(2, "密码");
dic.Add(3, "是否");
dic.Add(4, "日期");

 

           using (StreamReader sReader = new StreamReader("D:/tab.txt", Encoding.Default))
            {
                StringBuilder builder = new StringBuilder();

                while (!sReader.EndOfStream)
                {
                    string sLine = sReader.ReadLine();
                    string[] strLines = sLine.Split(‘,‘);
                    builder.AppendFormat("<tabName>\r\n");
                    for (int i = 0; i < strLines.Length - 1; i++)
                    {
                        builder.AppendFormat("<" + dic[i] + ">{0}</" + dic[i] + ">\r\n", strLines[i]);
                    }
                    builder.AppendFormat("</tabName>\r\n");
                }

                builder.AppendFormat("\r\n");
                File.WriteAllText("D:/txtToxml.xml", "<?xml version=\"1.0\" encoding=\"utf-8\"?>\r\n<Root>\r\n" + builder.ToString() + "</Root>");
            }
            Console.WriteLine("转换成功,按下任意键再将xml文件转换成txt文件.");
            Console.ReadKey();

               这一步就将 txt文件中以逗号分隔的数据转换成了xml文件了，其实也没什么难点。

            XDocument xReader = XDocument.Load(@"D:/txtToxml.xml");
            XElement root = xReader.Root;
            StringBuilder sb = new StringBuilder();
            foreach (XElement x in root.Elements())
            {
                foreach (XElement x2 in x.Elements())
                {
                    sb.AppendFormat(x2.Value + ",");
                }
                sb.AppendFormat("\r\n");
            }
            File.WriteAllText(@"D:/xmlTotxt.txt", sb.ToString());
            Console.WriteLine("转换成功!");

          这一步就又把xml文件转换成了刚刚的txt文件了，也没什么难的。