如何用c#将数据库中的记录制成xml_c#应用

以前在一个公司项目中要用数据库中的记录生成相应的XML文档[主要是为了提高访问速度],但由于当时资料的缺乏,在研发过程中碰到了但是的困难,好在最终完成了工作,我在这里把当时其中的一个功能函数列出来,其于的函数大同小意,希望兄弟们以后在碰到这样的问题时不象我当初相同再吃苦头.
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Web;
using System.Web.Services;
using System.Xml;
using System.Data.SqlClient;
using System.Configuration;
using System.Text;
using System.Xml.Xsl;
using System.IO;

namespace admin
{
/// <summary>
/// CreateXML 的摘要说明。
/// </summary>
///
[System.Web.Services.WebService(Namespace="http://..../admin/createxml.asmx",Description="生成或更新星迷俱乐部中的xml文档")]

public class CreateXML : System.Web.Services.WebService
{
public CreateXML()
{
//CODEGEN: 该调用是 ASP.NET Web 服务设计器所必需的
InitializeComponent();
}

#region 组件设计器生成的代码

//Web 服务设计器所必需的
private IContainer components = null;

/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
}

/// <summary>
/// 清理任何正在使用的资源。
/// </summary>
protected override void Dispose( bool disposing )
{
if(disposing && components != null)
{
components.Dispose();
}
base.Dispose(disposing);
}

#endregion

[WebMethod]
public string CreateClubXMLByID(String ID)
{
DateTime filenamedate=DateTime.Now;
CreatePath("..\\" filenamedate.Year.ToString(),filenamedate.Month.ToString() "_" filenamedate.Day.ToString());//按时期生成相应的时期型文档夹
string filename=Server.MapPath("..\\" filenamedate.Year.ToString() "\\" filenamedate.Month.ToString() "_" filenamedate.Day.ToString() "\\Club" ID.Trim() ".xml");
XmlTextWriter PicXmlWriter = null;
Encoding GB = Encoding.GetEncoding("GB2312");
PicXmlWriter = new XmlTextWriter (filename,GB);

try
{
string strConn=ConfigurationSettings.AppSettings["starclub"];

String SQLStatement="SELECT * FROM club where id=" ID.ToString().Trim();
SqlConnection myConnection= new SqlConnection(strConn);
SqlDataAdapter myCommand = new SqlDataAdapter(SQLStatement,myConnection);
DataSet myDataSet;
myCommand.SelectCommand.CommandType=CommandType.Text;
myDataSet = new DataSet();
myCommand.Fill(myDataSet, "MyTable");

PicXmlWriter.Formatting = Formatting.Indented;
PicXmlWriter.Indentation= 6;
PicXmlWriter.Namespaces = false;
PicXmlWriter.WriteStartDocument();
//PicXmlWriter.WriteDocType("文档类型", null, ".xml", null);
//PicXmlWriter.WriteComment("按在数据库中记录的ID进行记录读写");
PicXmlWriter.WriteProcessingInstruction("xml-stylesheet","type=text/xsl href=../../xsl/1.xsl") ; //写入用于解释的XSL文档名
PicXmlWriter.WriteStartElement("","club","");
foreach(DataRow r in myDataSet.Tables[0].Rows) //依次取出任何行
{
PicXmlWriter.WriteStartElement("","record","");
foreach(DataColumn c in myDataSet.Tables[0].Columns) //依次找出当前记录的任何列属性
{
if ((c.Caption.ToString()!="pic"))
{
PicXmlWriter.WriteStartElement("",c.Caption.ToString().Trim(),""); //写入字段名
PicXmlWriter.WriteString(r[c].ToString().Trim()); //写入数据
PicXmlWriter.WriteEndElement();
}
else
{
PicXmlWriter.WriteStartElement("",c.Caption.ToString().Trim(),"");
string [] pic=r[c].ToString().Trim().Split(|);
for (int i=0;i<pic.Length;i )
{

if (pic[i].Trim()!="") //数据库中图片字段的插入格式为: 文档名,高,宽| 以此类推. 例如 no.jpg,132,142|
{
PicXmlWriter.WriteStartElement("",c.Caption.ToString().Trim() "s","");
string [] picstr=pic[i].Split(,);
PicXmlWriter.WriteStartElement("","picstr","");
PicXmlWriter.WriteString(picstr[0].Trim().Trim());
PicXmlWriter.WriteEndElement();

PicXmlWriter.WriteStartElement("","height","");
PicXmlWriter.WriteString(picstr[1].Trim().Trim());
PicXmlWriter.WriteEndElement();

PicXmlWriter.WriteStartElement("","width","");
PicXmlWriter.WriteString(picstr[1].Trim().Trim());
PicXmlWriter.WriteEndElement();

PicXmlWriter.WriteStartElement("","comment","");
PicXmlWriter.WriteString(pic[ i].Trim().Trim());
PicXmlWriter.WriteEndElement();
PicXmlWriter.WriteEndElement();
}
else
{
i ;
}

}
PicXmlWriter.WriteEndElement();

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