Separate config file for sections of web.config

Is it possible to have separate config files for specific sections of the web.config? Specifically I'开发者_运维百科d like to move IIS 7's rewrite section out of the web.config and into it's own config file.

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You can certainly move your rewrite rules and mappings out to a separate file:

Storing URL rewrite mappings in a separate file

<system.webServer>
  <rewrite>
    <rewriteMaps configSource="rewritemaps.config" />
    <rules configSource="rewriteRules.config" />
  </rewrite>
</system.webServer>

In addition you can move quite a few configuration sections to their own files:

<appSettings configSource="appSettings.config" /> [Docs]

<connectionStrings configSource="connectionStrings.config"/> [Docs]

<pages configSource="pages.config"/> [Docs]

For more info see this page which will help you decide if a configuration section can be stored externally:

General Attributes Inherited by Section Elements

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Yes, this is possible.

For each configuration section, you can set the configSource attribute to the location (file) where you are holding the configuration.

E.g.:

<appSettings configSource="appSettings.config" />

And in appSettings.config:

<?xml version="1.0" encoding="UTF-8"?>
<appSettings>
    <add key="myKey" value="myValue" />
</appSettings>