blocks|key|258970|text|file属性|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|258971|settings|258972|specific+|unordered-list-item|258973|
|258974|将包含自定义应用程序配置的外部文件的相对路径指定到appSettings部分|258975|258976|+.config文件中的合并(并覆盖)设置|258977|258978|在修改指定的API时不会导致web应用程序重新启动Configuration.AppSettings.Settings.Add+.config将导致所有设置合并回<|258979|
>C22appSettings>.Save调用。|258980|自。如果文件不存在，则不抛出NET+1.1|258981|258982|Exception。|258983|258984|configSource属性|258985|Configuration.AppSettings.Settings.Add+2.0|258986|System.Configuration.ConfigurationErrorsException可以应用于配置文件的大多数节，而不仅仅是覆盖外部文件的整个节，no+Configuration.AppSettings.Settings.Add|BOLD|258987|258988|将导致所有设置被添加到Configuration中指定的文件中。Save调用.|258989|
<Configuration>H156Save>，因为如果配置源文件不存在，则会抛出+API。<代码>H260<代码>F261|258990|file属性指定一个包含自定义设置的外部文件，就像您在web.config文件的appSettings条目中所做的那样。同时，在configSource属性中指定的外部文件包含为其声明configSource的部分的设置。例如，如果使用pages部分的configSource属性，则外部文件将包含pages部分的设置。|258991|258992|在file属性中指定的外部配置中声明的自定义设置将与web.config文件的appSettings部分中的设置合并。同时，configSource+不支持合并，这意味着你必须将整个部分设置移动到外部文件中。|blockquote|258993|258994|258995|http://www.codeproject.com/Messages/1463547/Re-difference-between-configSource-and-file-attrib.aspx|258996|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/system.configuration.configuration.aspx|1|http://msdn.microsoft.com/en-us/library/system.configuration.configuration.appsettings.aspx|2|http://msdn.microsoft.com/en-us/library/system.configuration.appsettingssection.settings.aspx|3|http://msdn.microsoft.com/en-us/library/ms134548.aspx|4|http://msdn.microsoft.com/en-us/library/ms134087.aspx|5|6|7|8|9|10|11|12|13|14|15|16^0|0|4|0|0|0|0|P|B|0|0|0|0|P|D|0|13|B|1|1F|8|2|1O|3|3|0|I|4|4|0|0|0|0|0|0|C|0|0|D|5|E|B|6|Q|8|7|Z|3|8|0|0|1D|28|15|2B|D|9|2P|B|A|31|8|B|3A|3|C|0|0|0|13|B|D|D|W|4|E|0|1|1R|2|D|F|0|0|4G|0|4|1S|C|3I|C|0|0|0|22|23|T|1|4|Q|A|13|B|1Q|C|0|0|0|0|2R|0|2R|G|0^^$0|@$1|2|3|4|5|6|7|2G|8|@$9|2H|A|2I|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|2J|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|2K|8|@]|D|@]|E|$]]|$1|K|3|L|5|6|7|2L|8|@]|D|@]|E|$]]|$1|M|3|N|5|J|7|2M|8|@$9|2N|A|2O|B|C]]|D|@]|E|$]]|$1|O|3|L|5|6|7|2P|8|@]|D|@]|E|$]]|$1|P|3|Q|5|J|7|2Q|8|@]|D|@]|E|$]]|$1|R|3|L|5|6|7|2R|8|@]|D|@]|E|$]]|$1|S|3|T|5|J|7|2S|8|@]|D|@$9|2T|A|2U|1|2V]|$9|2W|A|2X|1|2Y]|$9|2Z|A|30|1|31]|$9|32|A|33|1|34]]|E|$]]|$1|U|3|V|5|6|7|35|8|@]|D|@$9|36|A|37|1|38]]|E|$]]|$1|W|3|X|5|J|7|39|8|@]|D|@]|E|$]]|$1|Y|3|L|5|6|7|3A|8|@]|D|@]|E|$]]|$1|Z|3|10|5|J|7|3B|8|@]|D|@]|E|$]]|$1|11|3|-4|5|6|7|3C|8|@]|D|@]|E|$]]|$1|12|3|13|5|6|7|3D|8|@$9|3E|A|3F|B|C]]|D|@]|E|$]]|$1|14|3|15|5|6|7|3G|8|@]|D|@$9|3H|A|3I|1|3J]|$9|3K|A|3L|1|3M]|$9|3N|A|3O|1|3P]|$9|3Q|A|3R|1|3S]]|E|$]]|$1|16|3|17|5|J|7|3T|8|@$9|3U|A|3V|B|C]|$9|3W|A|3X|B|18]]|D|@$9|3Y|A|3Z|1|40]|$9|41|A|42|1|43]|$9|44|A|45|1|46]|$9|47|A|48|1|49]]|E|$]]|$1|19|3|L|5|6|7|4A|8|@]|D|@]|E|$]]|$1|1A|3|1B|5|J|7|4B|8|@$9|4C|A|4D|B|18]]|D|@$9|4E|A|4F|1|4G]|$9|4H|A|4I|1|4J]]|E|$]]|$1|1C|3|1D|5|6|7|4K|8|@$9|4L|A|4M|B|18]]|D|@$9|4N|A|4O|1|4P]]|E|$]]|$1|1E|3|1F|5|6|7|4Q|8|@$9|4R|A|4S|B|18]|$9|4T|A|4U|B|C]|$9|4V|A|4W|B|C]|$9|4X|A|4Y|B|C]]|D|@]|E|$]]|$1|1G|3|-4|5|6|7|4Z|8|@]|D|@]|E|$]]|$1|1H|3|1I|5|1J|7|50|8|@$9|51|A|52|B|18]|$9|53|A|54|B|18]|$9|55|A|56|B|C]|$9|57|A|58|B|C]|$9|59|A|5A|B|C]|$9|5B|A|5C|B|C]]|D|@]|E|$]]|$1|1K|3|-4|5|6|7|5D|8|@]|D|@]|E|$]]|$1|1L|3|-4|5|6|7|5E|8|@]|D|@]|E|$]]|$1|1M|3|1N|5|6|7|5F|8|@$9|5G|A|5H|B|18]]|D|@$9|5I|A|5J|1|5K]]|E|$]]|$1|1O|3|-4|5|6|7|5L|8|@]|D|@]|E|$]]]|1P|$1Q|$5|1R|1S|1T|E|$1U|1V]]|1W|$5|1R|1S|1T|E|$1U|1X]]|1Y|$5|1R|1S|1T|E|$1U|1Z]]|20|$5|1R|1S|1T|E|$1U|21]]|22|$5|1R|1S|1T|E|$1U|23]]|24|$5|1R|1S|1T|E|$1U|1V]]|25|$5|1R|1S|1T|E|$1U|1X]]|26|$5|1R|1S|1T|E|$1U|1Z]]|27|$5|1R|1S|1T|E|$1U|21]]|28|$5|1R|1S|1T|E|$1U|1V]]|29|$5|1R|1S|1T|E|$1U|1X]]|2A|$5|1R|1S|1T|E|$1U|1Z]]|2B|$5|1R|1S|1T|E|$1U|21]]|2C|$5|1R|1S|1T|E|$1U|1V]]|2D|$5|1R|1S|1T|E|$1U|23]]|2E|$5|1R|1S|1T|E|$1U|1V]]|2F|$5|1R|1S|1T|E|$1U|1N]]]]

<code>file</code> attribute

<ul>
<li>Specifies a relative path to an external file that contains custom application configuration settings</li>
<li>specific to the <code>appSettings</code> section</li>
<li>will merge (and override) settings in the .config file</li>
<li>will not cause web application to restart when modifying the specified file</li>
<li><a href="http://msdn.microsoft.com/en-US/library/ms228154(v=vs.100).aspx" rel="noreferrer">http://msdn.microsoft.com/en-US/library/ms228154(v=vs.100).aspx</a></li>
<li>Using the <a href="http://msdn.microsoft.com/en-us/library/system.configuration.configuration.aspx" rel="noreferrer">Configuration</a>.<a href="http://msdn.microsoft.com/en-us/library/system.configuration.configuration.appsettings.aspx" rel="noreferrer">AppSettings</a>.<a href="http://msdn.microsoft.com/en-us/library/system.configuration.appsettingssection.settings.aspx" rel="noreferrer">Settings</a>.<a href="http://msdn.microsoft.com/en-us/library/ms134548.aspx" rel="noreferrer">Add</a> API will result in all settings being merged back into the main <code>.config</code> on a <a href="http://msdn.microsoft.com/en-us/library/system.configuration.configuration.aspx" rel="noreferrer">Configuration</a>.<a href="http://msdn.microsoft.com/en-us/library/ms134087.aspx" rel="noreferrer">Save</a> call.</li>
<li>since .NET 1.1</li>
<li>Exception is not thrown if file does not exist.</li>
</ul>

<code>configSource</code> attribute

<ul>
<li>can apply to most sections of a configuration file, not just <code>appSettings</code></li>
<li>will override the entire section with the external file, no merging</li>
<li><a href="http://msdn.microsoft.com/en-US/library/system.configuration.sectioninformation.restartonexternalchanges%28v=vs.100%29.aspx" rel="noreferrer">CAN cause web application to restart</a></li>
<li><a href="http://msdn.microsoft.com/en-US/library/system.configuration.sectioninformation.configsource(v=vs.100).aspx" rel="noreferrer">http://msdn.microsoft.com/en-US/library/system.configuration.sectioninformation.configsource(v=vs.100).aspx</a></li>
<li>Using the <a href="http://msdn.microsoft.com/en-us/library/system.configuration.configuration.aspx" rel="noreferrer">Configuration</a>.<a href="http://msdn.microsoft.com/en-us/library/system.configuration.configuration.appsettings.aspx" rel="noreferrer">AppSettings</a>.<a href="http://msdn.microsoft.com/en-us/library/system.configuration.appsettingssection.settings.aspx" rel="noreferrer">Settings</a>.<a href="http://msdn.microsoft.com/en-us/library/ms134548.aspx" rel="noreferrer">Add</a> API will result in all settings being added to the file specified in <code>configSource</code> on a <a href="http://msdn.microsoft.com/en-us/library/system.configuration.configuration.aspx" rel="noreferrer">Configuration</a>.<a href="http://msdn.microsoft.com/en-us/library/ms134087.aspx" rel="noreferrer">Save</a> call.</li>
<li>since .NET 2.0</li>
<li><code>System.Configuration.ConfigurationErrorsException</code> is thrown if config source file does not exist.</li>
</ul>

The <code>file</code> attribute specifies an external file containing custom settings like you do in the appSettings entry of the web.config file. 
Meanwhile, the external file specified in the <code>configSource</code> attribute contains the settings for the section which you declare the configSource for. For example, if you use the <code>configSource</code> attribute of the pages section, then the external file will contain the settings for the pages section.

<blockquote>
 The custom settings declared in the external config specified in the
 <code>file</code> attribute will be merged with the settings in the <code>appSettings</code>
 section in the <code>web.config</code> file. In the meanwhile, the <code>configSource</code>
 does not support merging, it means that you'll have to move the entire
 section settings into the external file.
</blockquote>

<a href="http://www.codeproject.com/Messages/1463547/Re-difference-between-configSource-and-file-attrib.aspx" rel="noreferrer">http://www.codeproject.com/Messages/1463547/Re-difference-between-configSource-and-file-attrib.aspx</a>

Within an <code>web.config</code>-file in an ASP.NET-application some sections of config, like <code>appSettings</code> and <code>connectionStrings</code>, supports the attributes <code>file</code> and <code>configSource</code>.

What is the difference between using the <code>file</code>-attribute and the <code>configSource</code>-attribute? When should you use which attribute and can you use both?

<pre><code>&lt;?xml version="1.0"?&gt;
&lt;configuration&gt;
 &lt;appSettings file="AppSettings.config"&gt;
 &lt;/appSettings&gt;
 &lt;connectionStrings configSource="ConnectionStrings.config"&gt; 
 &lt;/connectionStrings&gt;
 &lt;!-- ... --&gt;
&lt;/configuration&gt;
</code></pre>

ASP.NET web.config: configSource vs. file attributes

在ASP.Net应用程序的web.config-file中，某些配置部分支持属性configSource.和connectionStrings，如appSettings和connectionStrings使用file-attribute和configSource-attribute?有什么不同什么时候应该使用哪一个属性...

问ASP.NET web.config: configSource与文件属性
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