vIEwpost.ASPx--察看提交的留言
vIEwguestbook.ASPx--察看所有留言
Header.inc
guestpost.ASPx--留言表單及XML寫操作
Footer.inc
Guest.xml--XML數據
源代碼如下：
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="" center" class="newsbody">My Guestbook.</h3>
<ASP:Repeater id="MyDataList" runat="server">
<template name="headertemplate">
<table class="mainheads" width="100%" >
<tr itemtemplate">
<tr footertemplate">
</table>
</template>
</ASP:Repeater>
<!-- </body>
</Html>
