ASP.NET Tutorial/XML/XmlNode — различия между версиями
Admin (обсуждение | вклад) м (1 версия) |
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Текущая версия на 11:57, 26 мая 2010
Display data in XML file recursively (VB.net)
<%@ Page Language="VB" %>
<%@ Import Namespace="System.Xml" %>
<script runat=server>
sub Page_Load(Sender as Object, e as EventArgs)
dim xmldoc as new XMLDocument()
xmldoc.Load(Server.MapPath("Data.xml"))
ShowTree(xmldoc.DocumentElement)
end sub
sub ShowTree(node as XMLNode)
Dim attrnode As XmlNode
Dim map As XmlNamedNodeMap
If Not(node.HasChildNodes)
output.Text += "<b>" & node.Name & "</b> <" & _
node.Value & "><br>" & vbcrlf
Else
output.Text += "<b>" & node.Name & "</b>"
If node.NodeType = XmlNodeType.Element Then
map = node.Attributes
For Each attrnode In map
output.Text += " <b>" & attrnode.Name & "</b> <" & _
attrnode.Value & "> " & vbcrlf
Next
End If
output.Text += "<br>"
End If
If node.HasChildNodes then
node = node.FirstChild
While not IsNothing(node)
ShowTree(node)
node = node.NextSibling
end while
end if
end sub
</script>
<html><body>
<asp:Label id="output" runat="server" />
</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>
Load data from XML
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="HolmesQuote" %>
<!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>
</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.Xml;
public partial class HolmesQuote : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
MyQuote quotes = new MyQuote(Server.MapPath("./Data.xml"));
Quotation quote = quotes.GetRandomQuote();
Response.Write("<b>" + quote.Source + "</b> (<i>" + quote.Date + "</i>)");
Response.Write("<blockquote>" + quote.QuotationText + "</blockquote>");
}
}
public class Quotation
{
private string qsource;
private string date;
private string quotation;
public Quotation(XmlNode quoteNode)
{
if ( (quoteNode.SelectSingleNode("source")) != null)
qsource = quoteNode.SelectSingleNode("source").InnerText;
if ( (quoteNode.Attributes.GetNamedItem("date")) != null)
date = quoteNode.Attributes.GetNamedItem("date").Value;
quotation = quoteNode.FirstChild.InnerText;
}
public string Source
{
get
{
return qsource;
}
set
{
qsource = value;
}
}
public string Date
{
get
{
return date;
}
set
{
date = value;
}
}
public string QuotationText
{
get
{
return quotation;
}
set
{
quotation = value;
}
}
}
public class MyQuote
{
private XmlDocument quoteDoc;
private int quoteCount;
public MyQuote(string fileName)
{
quoteDoc = new XmlDocument();
quoteDoc.Load(fileName);
quoteCount = quoteDoc.DocumentElement.ChildNodes.Count;
}
public Quotation GetRandomQuote()
{
int i;
Random x = new Random();
i = x.Next(quoteCount-1);
return new Quotation( quoteDoc.DocumentElement.ChildNodes[i] );
}
}
File: Data.xml
<?xml version="1.0"?>
<quotations>
<quotation date="1887">
<pre>A</pre>
<source>W</quotation> <quotation date="1887">
t
S</quotation>
</quotations></source>
MoveToNextAttribute
<%@ import Namespace="System" %>
<%@ import Namespace="System.Xml" %>
<%@ Page Language="C#" %>
<script runat="server">
XmlTextReader _Reader;
public void Page_Load(Object Source, EventArgs E)
{
try{
_Reader = new XmlTextReader(Server.MapPath("Data.xml"));
ReadDocument(_Reader);
}
catch (Exception _Error){
ErrorLabel.Text = _Error.Message;
}
finally{
_Reader.Close();
}
}
public void ReadDocument(XmlTextReader _XmlReader)
{
System.Text.StringBuilder sb = new System.Text.StringBuilder(100);
String space3 = " ";
String space = " ";
while (_XmlReader.Read())
{
switch(_XmlReader.NodeType)
{
case XmlNodeType.Element:
sb.Append("<B>Element: </B>");
sb.Append(_XmlReader.Name);
sb.Append("<BR/>");
if (_XmlReader.AttributeCount > 0)
{
while (_XmlReader.MoveToNextAttribute())
{
sb.Append(space3);
sb.Append("<B>Attribute Name: </B>");
sb.Append(_XmlReader.Name);
sb.Append(space);
sb.Append("<B>Attribute Value: </B>");
sb.Append(_XmlReader.Value);
sb.Append("<BR/>");
}
}
break;
case XmlNodeType.Text:
sb.Append(space3);
sb.Append("<B>Value: </B>");
sb.Append(_XmlReader.Value);
sb.Append("<BR/>");
break;
}
}
OutputLiteral.Text = sb.ToString();
}
</script>
<html>
<head>
<title>Using the XmlTextReader</title>
</head>
<body>
<form runat="server">
<asp:Literal id="OutputLiteral" runat="server" EnableViewState="False"></asp:Literal>
<asp:Label id="ErrorLabel" runat="server" ForeColor="Red"></asp:Label>
</form>
</body>
</html>