DataSet,DataTable,XML格式互转

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//// <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> /// 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]; }