use Element for browserCaps (ASP.NET Settings Schema)

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Specifies the HTTP request string that are used to parse the browser capability information that is stored in the filter and case elements.

Note

Using the browserCaps element in the Web.config file to define browsers is deprecated in the .NET Framework 2.0 but is still supported. The data in this element is merged with the information from the browser definition files (.browser) that are located in the machine-level %SystemRoot%\Microsoft.NET\Framework\version\CONFIG\Browsers folder and any existing application-level App_Browsers folders. For more information, see Browser Definition File Schema (browsers Element).

<use 
   var="server variable" 
   as="variableName"
/>

Attributes and Elements

The following sections describe attributes, child elements, and parent elements.

Attributes

Attribute Description

var

Optional String attribute.

Specifies the Microsoft Internet Information Services (IIS) server variable that is parsed to extract browser capability information.

The default is "HTTP_USER_AGENT".

as

Optional String attribute.

Specifies a name that can be used to reference the server variable in subsequent regular expressions.

Child Elements

None.

Parent Elements

Element Description

configuration

The required root element in every configuration file that is used by the common language runtime and the .NET Framework applications.

system.web

Specifies the root element for the ASP.NET configuration settings in a configuration file and contains configuration elements that configure ASP.NET Web applications and control how the applications behave.

browserCaps

Specifies the settings of supported browsers and the capabilities for the browsers. This element can be updated as required to specify new browsers and capabilities.

For a list of valid browser properties, see HttpBrowserCapabilities.

Remarks

The use element specifies the HTTP request string that is used to parse the browser capability information that is stored in the filter and case elements.

Default Configuration

In the .NET Framework version 2.0, the use element is not configured because the browserCaps element is deprecated in favor of using browser definition files to specify supported browsers and the capabilities for the browsers. For more information, see Browser Definition File Schema (browsers Element).

In the .NET Framework versions 1.0 and 1.1, the default use elements that are configured in the Machine.config file are too numerous to list here. For updates to the browser data, go to cyScape, Inc. at http://www.cyscape.com/browsercaps. Periodic device updates replace this browser capabilities section.

Example

The following code example demonstrates how to specify that the IIS HTTP_USER_AGENT server variable is the source of the browser capabilities information.

<use var="HTTP_USER_AGENT">

Element Information

Configuration section handler

HttpCapabilitiesSectionHandler

Configuration member

Browsers

Configurable locations

Machine.config

Root-level Web.config

Application-level Web.config

Virtual or physical directory–level Web.config

Requirements

Microsoft Internet Information Services (IIS) version 5.0, 5.1, or 6.0

The .NET Framework version 2.0 (deprecated), 1.1, or 1.0

Microsoft Visual Studio 2003 or Visual Studio 2005

See Also

Tasks

How to: Detect Browser Types in ASP.NET Web Pages
How to: Configure Specific Directories Using Location Settings
How to: Lock ASP.NET Configuration Settings

Reference

browserCaps Element (ASP.NET Settings Schema)
system.web Element (ASP.NET Settings Schema)
configuration Element (General Settings Schema)
filter Element for browserCaps (ASP.NET Settings Schema)
result Element for browserCaps (ASP.NET Settings Schema)
Browser Definition File Schema (browsers Element)
System.Configuration
System.Web.Configuration
HttpCapabilitiesSectionHandler
Browsers

Concepts

ASP.NET Web Server Controls and Browser Capabilities
ASP.NET Configuration File Hierarchy and Inheritance
Securing ASP.NET Configuration
ASP.NET Configuration Scenarios

Other Resources

General Configuration Settings (ASP.NET)
ASP.NET Configuration Settings
Configuring ASP.NET Applications
ASP.NET Configuration API