XmlDatasetConvert類提供的四種方法

xmldatasetconvert 該類提供了四種方法：

1、將xml物件內容字串轉換為dataset

2、將xml檔案轉換為dataset

3、將dataset轉換為xml物件字串

4、將dataset轉換為xml檔案

xmldatasetconvert.cs

using system;

using system.collections.generic;

using system.text;

using system.data;

using system.io;

using system.xml;

namespace xmldesign

class xmldatasetconvert

//將xml物件內容字串轉換為dataset

public static dataset convertxmltodataset(string xmldata)

stringreader stream = null;

xmltextreader reader = null;

trydataset xmlds = new dataset();

stream = new stringreader(xmldata);

//從stream裝載到xmltextreader

reader = new xmltextreader(stream);

xmlds.readxml(reader);

return xmlds;

catch (system.exception ex)

throw ex;

finally

if (reader != null) reader.close();

//將xml檔案轉換為dataset

public static dataset convertxmlfiletodataset(string xmlfile)

stringreader stream = null;

xmltextreader reader = null;

tryxmldocument xmld = new xmldocument();

xmld.load(xmlfile);

dataset xmlds = new dataset();

stream = new stringreader(xmld.innerxml);

//從stream裝載到xmltextreader

reader = new xmltextreader(stream);

xmlds.readxml(reader);

return xmlds;

catch (system.exception ex)

throw ex;

finally

if (reader != null) reader.close();

//將dataset轉換為xml物件字串

public static string convertdatasettoxml(dataset xmlds)

memorystream stream = null;

xmltextwriter writer = null;

trystream = new memorystream();

//從stream裝載到xmltextreader

writer = new xmltextwriter(stream, encoding.unicode);

//用writexml方法寫入檔案.

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();

//將dataset轉換為xml檔案

public static void convertdatasettoxmlfile(dataset xmlds,string xmlfile)

memorystream stream = null;

xmltextwriter writer = null;

trystream = new memorystream();

//從stream裝載到xmltextreader

writer = new xmltextwriter(stream, encoding.unicode);

//用writexml方法寫入檔案.

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編碼的文字

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();

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