в 15:30, 26 мая 2010

2010-05-26T15:30:57Z

Admin: 1 версия

2010-05-26T11:57:33Z

1 версия

Новая страница

== Fill XML data into StringBuilder from XmlTextReader==



<source lang="csharp">
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="ReadXmlEfficient" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Literal id="XmlText" runat="server"></asp:Literal>
</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.Text;
using System.Xml;
public partial class ReadXmlEfficient : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
string xmlFile = Server.MapPath("Data.xml");
XmlTextReader reader = new XmlTextReader(xmlFile);
StringBuilder str = new StringBuilder();
reader.ReadStartElement("DvdList");
while (reader.Read())
{
if ((reader.Name == "DVD") && (reader.NodeType == XmlNodeType.Element))
{
reader.ReadStartElement("DVD");
str.Append("<ul><b>");
str.Append(reader.ReadElementString("Title"));
str.Append("</b><li>");
str.Append(reader.ReadElementString("Director"));
str.Append("</li><li>");
str.Append(String.Format("{0:C}",Decimal.Parse(reader.ReadElementString("Price"))));
str.Append("</li></ul>");
}
}
reader.Close();
XmlText.Text = str.ToString();
}
}
File: Data.xml
<?xml version="1.0"?>
<DvdList>
<DVD ID="1" Category="Category 1">
<Title>title 1</Title>
<Director>directory 2</Director>
<Price>1</Price>
<Starring>
<Star>star 1</Star>
<Star>star 2</Star>
</Starring>
</DVD>
<DVD ID="2" Category="Category 2">
<Title>title 2</Title>
<Director>directory 2</Director>
<Price>2</Price>
<Starring>
<Star>star 3</Star>
<Star>star 4</Star>
</Starring>
</DVD>
</DvdList></source>

== Read xml and build page along with it==



<source lang="csharp">
<%@ 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></source>

== Use XMLTextReader to read the data in an XML file (VB.net)==



<source lang="csharp">
<%@ Page Language="VB" %>
<%@ Import Namespace="System.Xml" %>
<script runat=server>
sub Page_Load(Sender as Object, e as EventArgs)
dim reader as XMLTextReader

try
reader = new XMLTextReader(Server.MapPath("Data.xml"))
While reader.Read()
Response.Write("<b>" & reader.Name & "</b> " & _
reader.Value & "<br>")

End While
catch ex as Exception
Response.Write("Error accessing XML file")
finally
reader.close
end try
end sub
</script>
<html><body>
</body></html>
File: Data.xml
<?xml version="1.0"?>
<bookstore>
<book genre="asdf">
<title>asdf</title>
<author>
<first-name>asdf</first-name>
<last-name>asdf</last-name>
</author>
<price>asdf</price>
</book>
<book genre="asdf">
<title>asdf</title>
<author>
<first-name>asdf</first-name>
<last-name>asdf</last-name>
</author>
<price>asdf</price>
</book>
<book genre="asdf">
<title>asdf</title>
<author>
<first-name>asdf</first-name>
<last-name>asdf</last-name>
</author>
<price>asdf</price>
</book>
</bookstore></source>

← Предыдущая	Версия 15:30, 26 мая 2010
(нет различий)

ASP.NET Tutorial/XML/XMLTextReader - История изменений

в 15:30, 26 мая 2010

Admin: 1 версия