Read xml and build page along with it : XMLTextReader « XML « ASP.NET Tutorial






<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="ReadXML" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
   <title>Loading a DataSet with XML</title>
</head>
<body>
   <form id="form1" runat="server">
      <div id="container">
         <h1>Loading a DataSet with XML</h1>
         Enter the filename or the URL for the XML to be loaded:<br />
         <asp:TextBox ID="txtXML" runat="server" Columns="60"/>
         <asp:Button ID="btnLoad" runat="server" Text="Load XML" OnClick="btnLoad_Click" />
         <asp:Panel ID="panData" runat="server">
         Below you will see a list of <code>GridView</code> controls, one for each of the <code>DataTable</code>s generated from the XML
         <asp:PlaceHolder ID="phData" runat="server" />               
         </asp:Panel>
         <hr />
         <asp:Label ID="labMsg" runat="server" CssClass="error"/> 
      </div>
   </form>
</body>
</html>

File: Default.aspx.cs

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

using System.IO;
using System.Xml;

public partial class ReadXML : System.Web.UI.Page
{
   protected void Page_Load(object sender, EventArgs e)
   {
      if (!IsPostBack)
      {
         panData.Visible = false;
         txtXML.Text = "Data.xml";
      }
   }

   protected void btnLoad_Click(object sender, EventArgs e)
   {
      panData.Visible = true;
      string path = "";
      labMsg.Text = "";
      try
      {
         DataSet ds1 = new DataSet();
         path = txtXML.Text;         

         if (!path.StartsWith("http", StringComparison.CurrentCultureIgnoreCase))
            path = Server.MapPath(path);
         
         XmlTextReader xtr = new XmlTextReader(path);
         ds1.ReadXml(xtr, XmlReadMode.InferSchema);

         foreach (DataTable table in ds1.Tables)
         {
            Literal caption = new Literal();
            caption.Text = "<h2>Table: " + table.TableName + "</h2>";
            phData.Controls.Add(caption);

            GridView grid = new GridView();

            grid.CellPadding = 3;
            grid.DataSource = table.DefaultView;
            grid.DataBind();

            phData.Controls.Add(grid);
         }
      }
      catch (IOException)
      {
         panData.Visible = false;
         labMsg.Text = txtXML.Text + " not found";
      }
      catch
      {
         panData.Visible = false;
         labMsg.Text = path + " unable to be accessed";
      }
   }
}

File: Data.xml

<?xml version="1.0" ?>
<NavMenu title="GameSystems">
   <MenuItem title="PC" icon="images/icon_4.gif" >
      <Games>
         <Game>
            <name>Game 1</name>
            <price>free</price>
         </Game>
         <Game>
            <name>Game 2</name>
            <price>14.99</price>
         </Game>
      </Games>
   </MenuItem>
   <MenuItem title="Mac" icon="images/icon_3.gif" >
      <Games>
         <Game>
            <name>Game 3</name>
            <price>49.99</price>
         </Game>
      </Games>           
   </MenuItem>
</NavMenu>








25.15.XMLTextReader
25.15.1.Use XMLTextReader to read the data in an XML file (VB.net)
25.15.2.Fill XML data into StringBuilder from XmlTextReader
25.15.3.Read xml and build page along with it