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databases Element for sqlCacheDependency for caching (ASP.NET Settings Schema)

  • Artículo

Contains one or more named SQL connections that can be used by the SqlCacheDependency.

<databases>
    <add.../>
    <clear />
    <remove.../>
</databases>

Attributes and Elements

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

Attributes

None.

Child Elements

Element Description

add

Optional element.

Adds a SqlCacheDependencyDatabase object to the configuration collection.

clear

Optional element.

Removes all the SqlCacheDependencyDatabase objects from the configuration collection.

remove

Optional element.

Removes a named connection string from the configuration collection.

Note

This also removes inherited values.

Parent Elements

Element Description

configuration

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

system.web

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

caching

Configures the cache settings for a Web application.

sqlCacheDependency

Defines the settings used by the SqlCacheDependency class.

Remarks

Default Configuration

The following default databases element is not explicitly configured in the machine configuration file or in the root Web.config file, but is the default configuration returned by an application in the .NET Framework version 2.0.

<sqlCacheDependency enabled = "true" 
  pollTime = "60000">
  <databases>
    <add name = "" 
      connectionStringName = "" 
      pollTime = "60000"/>
  </databases>
</sqlCacheDependency>

<sqlCacheDependency enabled="true" 
  pollTime="60000">
  <databases>
    <clear />
  </databases>
</sqlCacheDependency>

Example

The following example adds a SqlCacheDependency to an ASP.NET application.

<sqlCacheDependency enabled="true" pollTime="30000">
  <databases>
    <add name="Pubs" connectionStringName="PubsConn" />
  </databases>
</sqlCacheDependency>

Element Information

Configuration Section Handler

System.Web.Configuration.SqlCacheDependencySection

Configuration Member

System.Web.Configuration.SqlCacheDependencySection.Databases

Configurable Locations

Machine.config

Root-level Web.config

Application-level Web.config

Requirements

IIS version 5.0, 5.1 and 6.0

.NET Framework version 2.0

Visual Studio 2005

See Also

Tasks

How to: Configure Specific Directories Using Location Settings
How to: Lock ASP.NET Configuration Settings

Reference

system.web Element (ASP.NET Settings Schema)
configuration Element (General Settings Schema)
caching Element (ASP.NET Settings Schema)
sqlCacheDependency Element for caching (ASP.NET Settings Schema)
add Element for database for caching (ASP.NET Settings Schema)
clear Element for database for caching (ASP.NET Settings Schema)
remove Element for database for caching (ASP.NET Settings Schema)
System.Configuration
System.Web.Configuration

Concepts

ASP.NET Caching Overview
How-to Topics — ASP.NET Caching (Visual Studio)
ASP.NET Configuration File Hierarchy and Inheritance
Securing ASP.NET Configuration
ASP.NET Configuration Scenarios

Other Resources

Getting Started - Enhancing Web Site Performance with Caching
Learning More - About Enhancing Web Site Performance with Caching
ASP.NET Caching (Visual Studio)
General Configuration Settings (ASP.NET)
ASP.NET Configuration Settings
Configuring ASP.NET Applications
ASP.NET Configuration Files
ASP.NET Configuration API