[XML]XML与Datatalbe_DataSet_之间的相互转换

using System;using System.Data;using System.Configuration;using System.Linq;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.HtmlControls;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Xml.Linq;using System.IO;using System.Xml;using System.Text;/// <summary>///Class1 的摘要说明/// </summary>public class Class1{    //    //TODO: 在此处添加构造函数逻辑    //    public class DataToXml    {        /**/        /// <summary>        /// 将DataTable对象转换成XML字符串        /// </summary>        /// <param name="dt">DataTable对象</param>        /// <returns>XML字符串</returns>        public static string CDataToXml(DataTable dt)        {            if (dt != null)            {                MemoryStream ms = null;                XmlTextWriter XmlWt = null;                try                {                    ms = new MemoryStream();                    //根据ms实例化XmlWt                    XmlWt = new XmlTextWriter(ms, Encoding.Unicode);                    //获取ds中的数据                    dt.WriteXml(XmlWt);                    int count = (int)ms.Length;                    byte[] temp = new byte[count];                    ms.Seek(0, SeekOrigin.Begin);                    ms.Read(temp, 0, count);                    //返回Unicode编码的文本                    UnicodeEncoding ucode = new UnicodeEncoding();                    string returnValue = ucode.GetString(temp).Trim();                    return returnValue;                }                catch (System.Exception ex)                {                    throw ex;                }                finally                {                    //释放资源                    if (XmlWt != null)                    {                        XmlWt.Close();                        ms.Close();                        ms.Dispose();                    }                }            }            else            {                return "";            }        }        /**/        /// <summary>        /// 将DataSet对象中指定的Table转换成XML字符串        /// </summary>        /// <param name="ds">DataSet对象</param>        /// <param name="tableIndex">DataSet对象中的Table索引</param>        /// <returns>XML字符串</returns>        public static string CDataToXml(DataSet ds, int tableIndex)        {            if (tableIndex != -1)            {                return CDataToXml(ds.Tables[tableIndex]);            }            else            {                return CDataToXml(ds.Tables[0]);            }        }        /**/        /// <summary>        /// 将DataSet对象转换成XML字符串        /// </summary>        /// <param name="ds">DataSet对象</param>        /// <returns>XML字符串</returns>        public static string CDataToXml(DataSet ds)        {            return CDataToXml(ds, -1);        }        /**/        /// <summary>        /// 将DataView对象转换成XML字符串        /// </summary>        /// <param name="dv">DataView对象</param>        /// <returns>XML字符串</returns>        public static string CDataToXml(DataView dv)        {            return CDataToXml(dv.Table);        }        /**/        /// <summary>        /// 将DataSet对象数据保存为XML文件        /// </summary>        /// <param name="dt">DataSet</param>        /// <param name="xmlFilePath">XML文件路径</param>        /// <returns>bool值</returns>        public static bool CDataToXmlFile(DataTable dt, string xmlFilePath)        {            if ((dt != null) && (!string.IsNullOrEmpty(xmlFilePath)))            {                string path = HttpContext.Current.Server.MapPath(xmlFilePath);                MemoryStream ms = null;                XmlTextWriter XmlWt = null;                try                {                    ms = new MemoryStream();                    //根据ms实例化XmlWt                    XmlWt = new XmlTextWriter(ms, Encoding.Unicode);                    //获取ds中的数据                    dt.WriteXml(XmlWt);                    int count = (int)ms.Length;                    byte[] temp = new byte[count];                    ms.Seek(0, SeekOrigin.Begin);                    ms.Read(temp, 0, count);                    //返回Unicode编码的文本                    UnicodeEncoding ucode = new UnicodeEncoding();                    //写文件                    StreamWriter sw = new StreamWriter(path);                    sw.WriteLine("<?xml version="1.0" encoding="utf-8"?>");                    sw.WriteLine(ucode.GetString(temp).Trim());                    sw.Close();                    return true;                }                catch (System.Exception ex)                {                    throw ex;                }                finally                {                    //释放资源                    if (XmlWt != null)                    {                        XmlWt.Close();                        ms.Close();                        ms.Dispose();                    }                }            }            else            {                return false;            }        }        /**/        /// <summary>        /// 将DataSet对象中指定的Table转换成XML文件        /// </summary>        /// <param name="ds">DataSet对象</param>        /// <param name="tableIndex">DataSet对象中的Table索引</param>        /// <param name="xmlFilePath">xml文件路径</param>        /// <returns>bool]值</returns>        public static bool CDataToXmlFile(DataSet ds, int tableIndex, string xmlFilePath)        {            if (tableIndex != -1)            {                return CDataToXmlFile(ds.Tables[tableIndex], xmlFilePath);            }            else            {                return CDataToXmlFile(ds.Tables[0], xmlFilePath);            }        }        /**/        /// <summary>        /// 将DataSet对象转换成XML文件        /// </summary>        /// <param name="ds">DataSet对象</param>        /// <param name="xmlFilePath">xml文件路径</param>        /// <returns>bool]值</returns>        public static bool CDataToXmlFile(DataSet ds, string xmlFilePath)        {            return CDataToXmlFile(ds, -1, xmlFilePath);        }        /**/        /// <summary>        /// 将DataView对象转换成XML文件        /// </summary>        /// <param name="dv">DataView对象</param>        /// <param name="xmlFilePath">xml文件路径</param>        /// <returns>bool]值</returns>        public static bool CDataToXmlFile(DataView dv, string xmlFilePath)        {            return CDataToXmlFile(dv.Table, xmlFilePath);        }    }    /**/    /// <summary>    /// XML形式的字符串、XML文江转换成DataSet、DataTable格式    /// </summary>    public class XmlToData    {        /**/        /// <summary>        /// 将Xml内容字符串转换成DataSet对象        /// </summary>        /// <param name="xmlStr">Xml内容字符串</param>        /// <returns>DataSet对象</returns>        public static DataSet CXmlToDataSet(string xmlStr)        {            if (!string.IsNullOrEmpty(xmlStr))            {                StringReader StrStream = null;                XmlTextReader Xmlrdr = null;                try                {                    DataSet ds = new DataSet();                    //读取字符串中的信息                    StrStream = new StringReader(xmlStr);                    //获取StrStream中的数据                    Xmlrdr = new XmlTextReader(StrStream);                    //ds获取Xmlrdr中的数据                    ds.ReadXml(Xmlrdr);                    return ds;                }                catch (Exception e)                {                    throw e;                }                finally                {                    //释放资源                    if (Xmlrdr != null)                    {                        Xmlrdr.Close();                        StrStream.Close();                        StrStream.Dispose();                    }                }            }            else            {                return null;            }        }        /**/        /// <summary>        /// 将Xml字符串转换成DataTable对象        /// </summary>        /// <param name="xmlStr">Xml字符串</param>        /// <param name="tableIndex">Table表索引</param>        /// <returns>DataTable对象</returns>        public static DataTable CXmlToDatatTable(string xmlStr, int tableIndex)        {            return CXmlToDataSet(xmlStr).Tables[tableIndex];        }        /**/        /// <summary>        /// 将Xml字符串转换成DataTable对象        /// </summary>        /// <param name="xmlStr">Xml字符串</param>        /// <returns>DataTable对象</returns>        public static DataTable CXmlToDatatTable(string xmlStr)        {            return CXmlToDataSet(xmlStr).Tables[0];        }        /**/        /// <summary>        /// 读取Xml文件信息,并转换成DataSet对象        /// </summary>        /// <remarks>        /// DataSet ds = new DataSet();        /// ds = CXmlFileToDataSet("/XML/upload.xml");        /// </remarks>        /// <param name="xmlFilePath">Xml文件地址</param>        /// <returns>DataSet对象</returns>        public static DataSet CXmlFileToDataSet(string xmlFilePath)        {            if (!string.IsNullOrEmpty(xmlFilePath))            {                string path = HttpContext.Current.Server.MapPath(xmlFilePath);                StringReader StrStream = null;                XmlTextReader Xmlrdr = null;                try                {                    XmlDocument xmldoc = new XmlDocument();                    //根据地址加载Xml文件                    xmldoc.Load(path);                    DataSet ds = new DataSet();                    //读取文件中的字符流                    StrStream = new StringReader(xmldoc.InnerXml);                    //获取StrStream中的数据                    Xmlrdr = new XmlTextReader(StrStream);                    //ds获取Xmlrdr中的数据                    ds.ReadXml(Xmlrdr);                    return ds;                }                catch (Exception e)                {                    throw e;                }                finally                {                    //释放资源                    if (Xmlrdr != null)                    {                        Xmlrdr.Close();                        StrStream.Close();                        StrStream.Dispose();                    }                }            }            else            {                return null;            }        }        /**/        /// <summary>        /// 读取Xml文件信息,并转换成DataTable对象        /// </summary>        /// <param name="xmlFilePath">xml文江路径</param>        /// <param name="tableIndex">Table索引</param>        /// <returns>DataTable对象</returns>        public static DataTable CXmlToDataTable(string xmlFilePath, int tableIndex)        {            return CXmlFileToDataSet(xmlFilePath).Tables[tableIndex];        }        /**/        /// <summary>        /// 读取Xml文件信息,并转换成DataTable对象        /// </summary>        /// <param name="xmlFilePath">xml文江路径</param>        /// <returns>DataTable对象</returns>        public static DataTable CXmlToDataTable(string xmlFilePath)        {            return CXmlFileToDataSet(xmlFilePath).Tables[0];        }        private string ConvertDataTableToXML(DataTable xmlDS)        {            MemoryStream stream = null;            XmlTextWriter writer = null;            try            {                stream = new MemoryStream();                writer = new XmlTextWriter(stream, Encoding.Default);                xmlDS.WriteXml(writer);                int count = (int)stream.Length;                byte[] arr = new byte[count];                stream.Seek(0, SeekOrigin.Begin);                stream.Read(arr, 0, count);                UTF8Encoding utf = new UTF8Encoding();                return utf.GetString(arr).Trim();            }            catch            {                return String.Empty;            }            finally            {                if (writer != null) writer.Close();            }        }        private DataSet ConvertXMLToDataSet(string xmlData)        {            StringReader stream = null;            XmlTextReader reader = null;            try            {                DataSet xmlDS = new DataSet();                stream = new StringReader(xmlData);                reader = new XmlTextReader(stream);                xmlDS.ReadXml(reader);                return xmlDS;            }            catch (Exception ex)            {                string strTest = ex.Message;                return null;            }            finally            {                if (reader != null)                    reader.Close();            }        }    }}