ASP.NET----从XML文档转换到DataSet

using System;
using System.Xml;
using System.Data;
using System.Text;
using System.IO;
namespace NET.MST.Tenth.XmlAndDataSet
{
    partial class XmlAndDataSet
    {
        static void Main(string[] args)
        {
            Console.WriteLine("从XML文档转换到DataSet：");
            DataSet ds = ConvertXMLFileToDataSet("..\\..\\Test.xml");
            PrintDataSet(ds);
            Console.WriteLine("从DataSet转换回XML文档：");
            ConvertDataSetToXML(ds).Save(Console.Out);
            Console.Read();
        }
        /// <summary>
        /// 打印DataSet
        /// </summary>
        /// <param name="ds">DataSet对象</param>
        static void PrintDataSet(DataSet ds)
        {
            foreach (DataTable table in ds.Tables)
            {
                Console.WriteLine("表{0}:", table.TableName);
                foreach (DataColumn column in table.Columns)
                {
                    Console.Write("{0}({1})  ", column.ColumnName, column.ColumnMapping.ToString());
                }
                Console.Write("\r\n");
                foreach (DataRow row in table.Rows)
                {
                    foreach (DataColumn col in table.Columns)
                    {
                        Console.Write("{0}  ", row[col.ColumnName].ToString().Trim());
                    }
                    Console.Write("\r\n");
                }
            }
        }
    }
    partial class XmlAndDataSet
    {
        /// <summary>
        /// 将xml文件转换为DataSet
        /// </summary>
        public static DataSet ConvertXMLFileToDataSet(string xmlFile)
        {
            //读入XML文档
            XmlDocument xml = new XmlDocument();
            xml.Load(xmlFile);
            DataSet result = new DataSet();
            using (StringReader stream = new StringReader(xml.InnerXml))
            {
                using (XmlTextReader reader = new XmlTextReader(stream))
                {
                    result.ReadXml(reader);
                    return result;
                }
            }
        }
        /// <summary>
        /// 将DataSet转换为xml对象字符串
        /// </summary>
        public static XmlDocument ConvertDataSetToXML(DataSet ds)
        {
            using (MemoryStream stream = new MemoryStream())
            {
                //通过XmlTextWriter来生成XML
                using (XmlTextWriter writer = new XmlTextWriter(stream, Encoding.Unicode))
                {
                    //DataSet转换为XML文档
                    ds.WriteXml(writer);
                    //从流中读出数据
                    int count = (int)stream.Length;
                    byte[] arr = new byte[count];
                    stream.Seek(0, SeekOrigin.Begin);
                    stream.Read(arr, 0, count);
                    XmlDocument result = new XmlDocument();
                    result.LoadXml("<?xml version='1.0' encoding='GB2312'?>"+
                        Encoding.Unicode.GetString(arr).Trim());
                    return result;
                }
            }
        }
    }
}