June 2002
Intermediate to advanced
816 pages
28h 12m
English
Content preview from ASP.NET in a NutshellBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Name
<appSettings>
Synopsis
<appSettings>
</appSettings>The <appSettings> element can be used to
configure custom application settings as key/value pairs. These
settings can later be retrieved at runtime using the AppSettings
property of the ConfigurationSettings class, as
shown in the example. This property is shared (static) and does not
require the ConfigurationSettings class to be
instantiated before accessing the property.
Scope
Any
Attributes
None
Child Elements
-
<add> The pattern to match.
-
<remove> The pattern to match.
-
<clear> The pattern to match.
Example
The following web.config section
sets an application level key/value pair:
<configuration>
<appSettings>
<add key="applicationConfigKey" value="bar"/>
</appSettings>
</configuration>The following ASP.NET page retrieves the value set by the preceding
code and also retrieves a value set at the machine.config level:
<%@ Page Language="VB" %>
<html>
<head>
<script runat="server">
Sub Page_Load( )
Message1.Text &= _
ConfigurationSettings.AppSettings("machineConfigKey")
Message2.Text &= _
ConfigurationSettings.AppSettings("applicationConfigKey")
End Sub
</script>
</head>
<body>
<asp:label id="Message1" runat="server">Machine.Config setting: </asp:label>
<br/>
<asp:label id="Message2" runat="server">Web.Config setting: </asp:label>
</body>
</html>Notes
As shown in the example, the <appSettings>
element can be used separately from the
<system.web> element and its children.
For security reasons, use caution when deciding what kinds of data ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.