XML与DataSet的相互转换类

浅浅的花香味﹌ 2024-03-30 13:14 68阅读 0赞

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

XmlDatasetConvert.cs  
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();  
\}  
\}

\}  
\}

使用示例  
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://www.bjcan.com/hengxing/%22http://news.baidu.com/n?cmd=1&class=sportnews&tn=rss%22][http_www.bjcan.com_hengxing_22http_news.baidu.com_n_cmd_1_class_sportnews_tn_rss_22]");  
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);  
\}  
\}  
\}

[http_www.bjcan.com_hengxing_22http_news.baidu.com_n_cmd_1_class_sportnews_tn_rss_22]: http://www.bjcan.com/hengxing/%22http://news.baidu.com/n?cmd=1&class=sportnews&tn=rss%22