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一个asp.net+xml留言本例子
viewpost.aspx--察看提交的留言
viewguestbook.aspx--察看所有留言
header.inc
guestpost.aspx--留言表单及xml写操作
footer.inc
guest.xml--xml数据
源代码如下：
viewguestbook.aspx
<%@ import namespace="system" %>
<%@ import namespace="system.io" %>
<%@ import namespace="system.data" %>
<%@ assembly name="system.xml" %>
<%@ import namespace="system.xml" %>
<%@ page language="c<%-- needed assembiles --%>
<html>
<head>
<title>welcome to saurabh's guestbook.</title>
<script language="c //run the script when the page is loaded
public void page_load(object sender, eventargs e)
{
// an label , its use stated later
tryagain :
//the path to the xml file which will contain all the data
//modify this if you have any other file or directory mappings.
//modify this if you have been directed here from step 2 of the readme file.
string datafile = "db/guest.xml" ;
//try-catch block to read from an xml file
try
{
//make an instance to the xmldatadocument class
//this class can read from an xml file in and ordered format
xmldatadocument datadoc = new xmldatadocument();
// infer the dataset schema from the xml data and load the xml data
datadoc.dataset.readxml(new streamreader(server.mappath(datafile)));
//databind the first table in the dataset to the repeter
mydatalist.datasource = datadoc.dataset.tables[0].defaultview;
mydatalist.databind();
//free up the xml file to be used by other programs
datadoc=null;
}
catch(ioexception ed)
{
// here i am for now trying to overcome a bug in my guestbook exapmle
//the bug is that only one class can either read or write to my xml
// data file at a time.
//if the file is being used my some some other page (eg the guest book viewing page)
// then an ioexception will be thrown
// so to handle such situtations what we do is that
// if an ioexception is thrown the page goes again to the tryagain label
//and tries to write again into the xml file
//this goes on till finally the resource is freed and the xml file is written to.
goto tryagain ;
}
catch (exception edd)
{
//catch any other exceptions that occur
errmess.text="cannot read from xml file because "+edd.tostring() ;
}
}
</script>
<link href="mystyle.css" type=text/css rel=stylesheet>
</head>
<body topmargin="0" leftmargin="0" marginwidth="0" marginheight="0" rightmargin="0">
<!-- <asp:label id="errmess" text="" style="color:<br>
<h3 align="center" class="newsbody">my guestbook.</h3>
<asp:repeater id="mydatalist" runat="server">
<template name="headertemplate">
<table class="mainheads" width="100%" style="font: 8pt verdana">
<tr style="background-color: <th>
name
</th>
<th>
country
</th>
<th>
email
</th>
<th>
comments
</th>
<th>
date/time
</th>
</tr>
</template>
<template name="itemtemplate">
<tr style="background-color: <td>
<% </td>
<td>
<% </td>
<td>
<% </td>
