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php爱好者> php文档>xml 与 DataSet

xml 与 DataSet

时间：2010-09-21 来源：英雄不问出处

XmlDatasetConvert 该类提供了四种方法：

    1、将xml对象内容字符串转换为DataSet
    2、将xml文件转换为DataSet
    3、将DataSet转换为xml对象字符串
    4、将DataSet转换为xml文件

using System;

using System.Collections.Generic;

using System.Text;

using System.Data;

using System.IO;

using System.Xml;

namespace XmlDesign

{

class XmlDatasetConvert

{

//将xml对象内容字符串转换为DataSet

public static DataSet ConvertXMLToDataSet(string xmlData)

{

StringReader stream = null;

XmlTextReader reader = null;

try

{

DataSet xmlDS = new DataSet();

stream = new StringReader(xmlData);

//从stream装载到XmlTextReader

reader = new XmlTextReader(stream);

xmlDS.ReadXml(reader);

return xmlDS;

}

catch (System.Exception ex)

{

throw ex;

}

finally

{

if (reader != null)

reader.Close();

}

//将xml文件转换为DataSet

public static DataSet ConvertXMLFileToDataSet(string xmlFile)

{

StringReader stream = null;

XmlTextReader reader = null;

try

{

XmlDocument xmld = new XmlDocument();

xmld.Load(xmlFile);

DataSet xmlDS = new DataSet();

stream = new StringReader(xmld.InnerXml);

//从stream装载到XmlTextReader

reader = new XmlTextReader(stream);

xmlDS.ReadXml(reader);

//xmlDS.ReadXml(xmlFile);

return xmlDS;

}

catch (System.Exception ex)

{

throw ex;

}

finally

{

if (reader != null)

reader.Close();

}

//将DataSet转换为xml对象字符串

public static string ConvertDataSetToXML(DataSet xmlDS)

{

MemoryStream stream = null;

XmlTextWriter writer = null;

try

{

stream = new MemoryStream();

//从stream装载到XmlTextReader

writer = new XmlTextWriter(stream, Encoding.Unicode);

//用WriteXml方法写入文件.

xmlDS.WriteXml(writer);

int count = (int) stream.Length;

byte[] arr = new byte[count];

stream.Seek(0, SeekOrigin.Begin);

stream.Read(arr, 0, count);

UnicodeEncoding utf = new UnicodeEncoding();

return utf.GetString(arr).Trim();

}

catch (System.Exception ex)

{

throw ex;

}

finally

{

if (writer != null)

writer.Close();

}

//将DataSet转换为xml文件

public static void ConvertDataSetToXMLFile(DataSet xmlDS, string xmlFile)

{

MemoryStream stream = null;

XmlTextWriter writer = null;

try

{

stream = new MemoryStream();

//从stream装载到XmlTextReader

writer = new XmlTextWriter(stream, Encoding.Unicode);

//用WriteXml方法写入文件.

xmlDS.WriteXml(writer);

int count = (int) stream.Length;

byte[] arr = new byte[count];

stream.Seek(0, SeekOrigin.Begin);

stream.Read(arr, 0, count);

//返回Unicode编码的文本

UnicodeEncoding utf = new UnicodeEncoding();

StreamWriter sw = new StreamWriter(xmlFile);

sw.WriteLine("<?xml version=\"1.0\" encoding=\"utf-8\"?>");

sw.WriteLine(utf.GetString(arr).Trim());

sw.Close();

}

catch (System.Exception ex)

{

throw ex;

}

finally

{

if (writer != null)

writer.Close();

}

使用

using System;

using System.Collections.Generic;

using System.Text;

using System.Xml;

using System.Data;

namespace XmlDesign

{

class Program

{

static void Main(string[] args)

{

DataSet ds = new DataSet();

转换一个XML文件(本地\网络均可)为一个DataSet#region 转换一个XML文件(本地\网络均可)为一个DataSet

//http://news.baidu.com/n?cmd=1&class=sportnews&tn=rss

//F:\study\001CSharp_Study\002Source\XmlDesign\XmlDesign\Save_Plan.xml

ds = XmlDatasetConvert.ConvertXMLFileToDataSet(@"http://news.baidu.com/n?cmd=1&class=sportnews&tn=rss");

Console.WriteLine("数据集名为\"

{0}\",包含{1}个表", ds.DataSetName, ds.Tables.Count);

foreach (DataTable dt in ds.Tables)

{

PrintTableName(dt.TableName);

}

#endregion

构造一个DataSet,并转换为XML字符串#region 构造一个DataSet,并转换为XML字符串

DataSet ds1 = new DataSet();

DataTable dt1 = new DataTable();

dt1.TableName = "test";

dt1.Columns.Add("id");

dt1.Columns.Add("name");

dt1.Rows.Add("i001", "hekui");

dt1.Rows.Add("i002", "liyang");

DataTable dt2 = new DataTable();

dt2.TableName = "test1";

dt2.Columns.Add("bookid");

dt2.Columns.Add("bookname");

dt2.Rows.Add("b001", "书本1");

dt2.Rows.Add("b002", "书本2");

ds1.Tables.Add(dt1);

ds1.Tables.Add(dt2);

ds1.DataSetName = "方案";

string xmlOut = XmlDatasetConvert.ConvertDataSetToXML(ds1);

#endregion

转换一个XML字符串为一个DataSet#region 转换一个XML字符串为一个DataSet

DataSet ds2 = new DataSet();

ds2 = XmlDatasetConvert.ConvertXMLToDataSet(xmlOut);

Console.WriteLine("数据集名为\"

{0}\",包含{1}个表", ds2.DataSetName, ds2.Tables.Count);

foreach (DataTable dt in ds2.Tables)

{

PrintTableName(dt.TableName);

}

#endregion

转换一个Dataset为一个XML文件#region 转换一个Dataset为一个XML文件

XmlDatasetConvert.ConvertDataSetToXMLFile(ds2, "c:\\adadsda1.xml");

#endregion

Console.ReadLine();

}

private static void PrintTableName(string tableName)

{

Console.WriteLine(tableName);

}