ASP.net Xml: DataSet的ReadXml(), WriteXml()和Response写Xml文档

 专题图编号：ylbtechASPnetXml100010011

1,功能描述

 　　这是一个基于.net操作Xml的案例示例，共有两个示例。

ylb_menu:1, DemoReadXml （DataSet的ReadXml()）

ylb_menu:2, DemoWriteXml（DataSet的WriteXml()和Response写Xml文档）

 

2,技术与环境

操作系统:	windows	开发语言:	C#
开发框架:		数据库:	无
开发软件:	Microsoft Visual Studio 2010
开发技术:	ASP.net+Xml
课程总策划:	yuanbo	成员:	null
个人主页:	http://www.cnblogs.com/ylbtech/
科研团队:	ylbtech	教研团队:	ylbtech

 

3,ylb_menu:1, DemoReadXml

ylb_tip:读Xml文档

 

3_1,/Vote.xml

<?xml version="1.0" encoding="utf-8"?>

<vote>

  <item belong="三国演义">

    <id>1</id>

    <name>赵云</name>

    <number>100</number>

  </item>

  <item belong="水浒">

    <id>2</id>

    <name>李逵</name>

    <number>4</number>

  </item>

  <item belong="三国演义">

    <id>3</id>

    <name>诸葛亮</name>

    <number>100</number>

  </item>

</vote>

 

3_2,/DemoReadXml.aspx.cs

using System;



using System.Data;

public partial class DemoReadXml : System.Web.UI.Page

{

    /// <summary>

    /// ylb;1, 读取XML文档

    /// </summary>

    private void ReadXml()

    { 

        //创建一个虚拟库

        DataSet ds = new DataSet();

        //加载XML

        ds.ReadXml(Server.MapPath("Vote.xml"));



        //取出表

        DataTable dt = ds.Tables[0];



        //遍历表

        Response.Write("<pre>");

        //循环行

        for (int i = 0; i < dt.Rows.Count; i++)

        { 

            //循环列

            for (int j = 0; j < dt.Columns.Count; j++)

            {

                //输出一列的值

                Response.Write(dt.Rows[i][j]+"\t");

            }

            Response.Write("\n");

        }

        Response.Write("</pre>");





        //把虚拟表给GridView

        GridView1.DataSource = dt;

        GridView1.DataBind();

    }

    protected void Page_Load(object sender, EventArgs e)

    {

        //调用

        ReadXml();

    }

}

 

4,ylb_menu:2, DemoWriteXml

 

4_1,DemoWriteXml.aspx.cs

ylb_tip:写Xml文档，Response写Xml文档

using System;



using System.Data;

using System.Data.SqlClient;

public partial class DemoWriteXml : System.Web.UI.Page

{



    /// <summary>

    /// ylb:1,把数据库中的表写成XML文档

    /// 数据读取器(DataReader)

    /// </summary>

    private void WriteXml()

    {

        string sql = "select top 10 productID,productName,unitPrice from Products";

        //string connStr = "Server=.;Database=Northwind;uid=sa;pwd=m123";

        string connStr = "Server=.;Database=Northwind;Integrated Security=SSPI";



        //创建一个虚拟库

        DataSet ds = new DataSet("Northwind");

        //创建一个虚拟表

        DataTable dt = new DataTable("Products");



        SqlConnection conn = new SqlConnection(connStr);

        SqlCommand com = conn.CreateCommand();



        //把sql赋值给com.CommandText

        com.CommandText = sql;

        //peican



        conn.Open();



        //execute

        try

        {

            SqlDataReader sdr = com.ExecuteReader();



            //向虚拟表中加载数据

            dt.Load(sdr);

        }

        finally

        {

            conn.Close();

        }



        //把表添加到库中 

        ds.Tables.Add(dt);



        //写XML文档

        ds.WriteXml(Server.MapPath("Products.xml"));



        Response.Write("写Xml文档成功！");



    }



    

    /// <summary>

    /// ylb:2,把数据库中的表写成XML文档

    /// 用适配器(DataAdapter)

    /// </summary>

    private void WriteXml2()

    {

        string sql = "select top 10 productID,productName,unitPrice from Products";

        string connStr = "Server=.;Database=Northwind;Integrated Security=SSPI";



        //创建一个虚拟表

        DataSet ds = new DataSet("Northwind");



        SqlDataAdapter sdr = new SqlDataAdapter(sql, connStr);



        //用适配器去填充虚拟库

        sdr.Fill(ds);



        ds.Tables[0].TableName = "Products";    //给表格命名        



        //写XML文档

        ds.WriteXml(Server.MapPath("Products2.xml"));



        Response.Write("写Xml文档成功！");

    }



    /// <summary>

    /// ylb:2,把数据库中的表写成XML文档

    /// 用适配器(DataReader)

    /// </summary>

    private void WriteXml3()

    {

        string connStr = "Server=.;Database=Northwind;Integrated Security=SSPI";

        string sql = "select top 10 productId,productName,unitprice from products";





        SqlConnection conn = new SqlConnection();

        conn.ConnectionString = connStr;



        SqlCommand cmd = conn.CreateCommand();

        cmd.CommandText = sql;



        conn.Open();

        try

        {

            //直接输出Xml文档

            Response.ContentType = "text/xml";  //输出文档类型为xml

            Response.Write("<?xml version='1.0' encoding='UTF-8'?>");   //声明xml

            Response.Write("<Northwind>");   //起始根元素

            SqlDataReader sdr = cmd.ExecuteReader();

            while (sdr.Read())

            {

                //子元素

                Response.Write("<Products>");

                Response.Write(string.Format("<productId>{0}</productId>", sdr.GetInt32(0)));

                Response.Write(string.Format("<productName>{0}</productName>", sdr.GetString(1)));

                Response.Write(string.Format("<unitprice>{0}</unitprice>", sdr.GetDecimal(2)));

                Response.Write("</Products>");

            }

            Response.Write("</Northwind>"); //终止根元素



        }

        finally

        {

            conn.Close();

        }



        Response.End(); //停止前台页面输出

    }

    protected void Page_Load(object sender, EventArgs e)

    {

        //调用

        //ylb:1,

        //WriteXml();



        //ylb:2,

        //WriteXml2();



        //ylb:3,

        WriteXml3();

    }

}

 

5,示例|讲解案例下载

博客园讲解:

       http://ylbtech.cnblogs.com/

百度文库开发文档:

       http://passport.baidu.com/?business&aid=6&un=ylbtech#7

谷歌开源代码下载:

       http://code.google.com/p/ylbtechaspnet/downloads/list

请单击“ylbtechASPnetXml100010011”

 

作者：ylbtech 出处：http://ylbtech.cnblogs.com/ 本文版权归作者和博客园共有，欢迎转载，但未经作者同意必须保留此段声明，且在文章页面明显位置给出原文连接，否则保留追究法律责任的权利。