/** <summary>

/// 把DataSet、DataTable、DataView格式转换成XML字符串、XML文件 /// </summary> 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]; } }

using System;  using System.Data;  using System.IO;  using System.Xml;  using System.Text;  // 相应C#代码：  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();  }  }

本文转自linzheng 51CTO博客，原文链接:http://blog.51cto.com/linzheng/1081859