blocks|key|3103714|text|当应用程序启动时，App.Config设置被缓存在内存中。出于这个原因，我认为如果不重新启动应用程序，您将无法更改这些设置。一种非常简单的替代方法是创建一个单独的、简单的XML配置文件，然后自己处理加载/缓存/重新加载它。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3103715|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

The App.Config settings are cached in memory when the application starts. For this reason, I don't think you'll be able to change those settings without restarting your application. One alternative that should be pretty straight forward would be to create a separate, simple XML configuration file, and handle loading/caching/reloading it yourself.

blocks|key|808985|text|在使用appSettings的外部配置文件时，这似乎是一个缺陷(可能是错误)。我尝试过使用configSource属性，但RefreshSection根本不起作用，我假设使用file属性时也是如此。如果你把你的appSettings移回你的web.config里面，RefreshSection将会完美的工作，但除此之外，我担心你注定要失败了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|808986|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

This seems to be a flaw (maybe a bug) when using an external config file for your appSettings. I've tried it using the configSource attribute and RefreshSection simply never works, I'm assuming this is the same when using the file attribute. 
If you move your appSettings back inside your web.config RefreshSection will work perfectly but otherwise I'm afraid you're doomed.

blocks|key|3949547|text|要编写代码，请这样调用：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3949548|Dim配置为System.Web.Configuration.WebConfigurationManager.OpenWebConfiguration("~")+=+System.Configuration.Configuration|3949549|返回配置(AddOrUpdateAppSetting，"YourSettingKey"，"YourValueForTheKey")|3949550|要读取并确保获取文件中的值，而不是缓存中的值，请按以下方式读取：|3949551|Dim+config+As+System.Configuration.Configuration+=+WebConfigurationManager.OpenWebConfiguration("~")
++Return+config.AppSettings.Settings("TheKeyYouWantTheValue").Value|code-block|syntax|javascript|3949552|完整示例：|3949553|Protected+Shared+Function+AddOrUpdateAppSetting(+_
+++++++ByVal+Config+As+System.Configuration.Configuration+_
+++++,+ByVal+TheKey+As+String+_
+++++,+ByVal+TheValue+As+String+_
+++++)+As+Boolean

++++Dim+retval+As+Boolean+=+True

++++Dim+Itm+As+System.Configuration.KeyValueConfigurationElement+=+_
++++++++Config.AppSettings.Settings.Item(TheKey)
++++If+Itm+Is+Nothing+Then
++++++++If+Config.AppSettings.Settings.IsReadOnly+Then
++++++++retval+=+False
++++++++Else
++++++++Config.AppSettings.Settings.Add(TheKey,+TheValue)
++++++++End+If


++++Else
++++++++'+config.AppSettings.Settings(thekey).Value+=+thevalue
++++++++If+Itm.IsReadOnly+Then
++++++++++++retval+=+False
++++++++Else
++++++++++++Itm.Value+=+TheValue
++++++++End+If


++++End+If
++++If+retval+Then
+++++Try
++++++++Config.Save(ConfigurationSaveMode.Modified)

+++++Catch+ex+As+Exception
++++++++retval+=+False
+++++End+Try

++++End+If

++++Return+retval

End+Function|3949554|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|U|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|V|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|W|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|X|8|@]|9|@]|A|$]]|$1|O|3|P|5|J|7|Y|8|@]|9|@]|A|$K|L]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

To write, call it this way:

Dim config As System.Configuration.Configuration = System.Web.Configuration.WebConfigurationManager.OpenWebConfiguration("~")

Return AddOrUpdateAppSetting(config, "YourSettingKey", "YourValueForTheKey")

To read and be sure you get the values in file, instead of those in cache, read it this way:

<pre><code>Dim config As System.Configuration.Configuration = WebConfigurationManager.OpenWebConfiguration("~")
 Return config.AppSettings.Settings("TheKeyYouWantTheValue").Value
</code></pre>

Full example:

<pre><code>Protected Shared Function AddOrUpdateAppSetting( _
 ByVal Config As System.Configuration.Configuration _
 , ByVal TheKey As String _
 , ByVal TheValue As String _
 ) As Boolean&lt;/p&gt;

 Dim retval As Boolean = True

 Dim Itm As System.Configuration.KeyValueConfigurationElement = _
 Config.AppSettings.Settings.Item(TheKey)
 If Itm Is Nothing Then
 If Config.AppSettings.Settings.IsReadOnly Then
 retval = False
 Else
 Config.AppSettings.Settings.Add(TheKey, TheValue)
 End If


 Else
 ' config.AppSettings.Settings(thekey).Value = thevalue
 If Itm.IsReadOnly Then
 retval = False
 Else
 Itm.Value = TheValue
 End If


 End If
 If retval Then
 Try
 Config.Save(ConfigurationSaveMode.Modified)

 Catch ex As Exception
 retval = False
 End Try

 End If

 Return retval

End Function
</code></pre>

blocks|key|3103849|text|确保将正确的case+sensitive值传递给RefreshSection，即|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3103850|ConfigurationManager.RefreshSection("appSettings");|code-block|syntax|javascript|3103851|entityMap|0|LINK|mutability|MUTABLE|url|http://en.wikipedia.org/wiki/Case_sensitivity^0|6|E|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

Make sure you are passing the correct <a href="http://en.wikipedia.org/wiki/Case_sensitivity" rel="noreferrer">case sensitive</a> value to RefreshSection, i.e. 

<pre><code>ConfigurationManager.RefreshSection("appSettings");
</code></pre>

blocks|key|809072|text|您是否尝试过将AppSettings存储在它自己的外部文件中？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|809073|从app.config/web.config：|809074|<appSettings+configSource="appSettings.config"></appSettings>|code-block|syntax|javascript|809075|appSettings.config：|809076|<?xml+version="1.0"?>
<appSettings>
++<add+key="SomeKey"+value="SomeValue"+/>
</appSettings>|809077|对appSettings.config所做的更改应该立即反映出来。更多信息：http://msdn.microsoft.com/en-us/library/system.configuration.sectioninformation.configsource.aspx|offset|length|809078|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/system.configuration.sectioninformation.configsource.aspx^0|0|0|0|0|0|12|2P|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Z|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|10|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|11|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|12|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|13|8|@]|9|@$O|14|P|15|1|16]]|A|$]]|$1|Q|3|-4|5|6|7|17|8|@]|9|@]|A|$]]]|R|$S|$5|T|U|V|A|$W|X]]]]

Have you tried storing your AppSettings in its own external file?

From app.config/web.config:

<pre><code>&lt;appSettings configSource="appSettings.config"&gt;&lt;/appSettings&gt;
</code></pre>

appSettings.config:

<pre><code>&lt;?xml version="1.0"?&gt;
&lt;appSettings&gt;
 &lt;add key="SomeKey" value="SomeValue" /&gt;
&lt;/appSettings&gt;
</code></pre>

Changes made to appSettings.config should be reflected instantly.
More info:
<a href="http://msdn.microsoft.com/en-us/library/system.configuration.sectioninformation.configsource.aspx" rel="nofollow noreferrer">http://msdn.microsoft.com/en-us/library/system.configuration.sectioninformation.configsource.aspx</a>

blocks|key|3949716|text|是。你被iis重新启动卡住了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3949717|在asp.net+4.0和iis+7.5中有一个删除了初始启动的功能。|3949718|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

Yes. you are stuck with iis restarting.

There is a feature with asp.net 4.0 and iis 7.5 where the initial startup is removed.

blocks|key|804787|text|我不确定这在web应用程序中是否可行，但它在桌面应用程序中可以工作。尝试使用ConfigurationSettings而不是ConfigurationManager+(它会因为您使用过时的类而大喊大叫……)，然后将所有数据读取到一个类中。当您希望刷新时，只需创建一个新实例并删除对旧实例的所有引用。我的理论是这样工作的(可能是错误的)：当您在整个运行过程中没有直接访问app.config文件时，应用程序就会解除文件锁定。然后，可以在不访问文件时进行编辑。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|804788|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I am not sure if this is possible in a web app, but it works in a desktop app. Try using ConfigurationSettings rather than ConfigurationManager (it will yell at you for using outdated classes...), then reading all the data into a class. When you wish to refresh, simply create a new instance and drop all references to the old instance. My theory for why this works (might be wrong): when you don't directly access the app.config file the entire time you are running, the file lock is dropped by the application. Then, edits can be made when you are not accessing the file.

blocks|key|3104226|text|作为另一种选择，您可以编写自己的ConfigSection并设置restartOnExternalChanges="false"。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3104227|然后，当使用ConfigurationManager.GetSection("yourSection")读取该部分时，设置将被自动刷新，而无需应用程序重新启动。|BOLD|3104228|你可以将你的设置实现为强类型或者NameValueCollection。|3104229|entityMap^0|G|D|W|W|0|6|1A|1R|G|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|R|8|@$9|S|A|T|B|C]|$9|U|A|V|B|H]]|D|@]|E|$]]|$1|I|3|J|5|6|7|W|8|@]|D|@]|E|$]]|$1|K|3|-4|5|6|7|X|8|@]|D|@]|E|$]]]|L|$]]

As an alternative you could write your own <code>ConfigSection</code> and set <code>restartOnExternalChanges="false"</code>.

Then, when reading the section with <code>ConfigurationManager.GetSection("yourSection")</code> the settings will be auto-refreshed without an application restart.

And you could implement your settings strongly typed or as NameValueCollection.

blocks|key|3104290|text|出于某种原因，ConfigurationManager.RefreshSection("appSettings")不为我工作。将Web.Config重新加载到Configuration对象中似乎工作正常。下面的代码假设Web.Config文件是executing+(bin)文件夹下的一个目录。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3104291|ExeConfigurationFileMap+configMap+=+new+ExeConfigurationFileMap();
Uri+uriAssemblyFolder+=+new+Uri(System.IO.Path.GetDirectoryName(Assembly.GetExecutingAssembly().GetName().CodeBase));
string+appPath+=+uriAssemblyFolder.LocalPath;
configMap.ExeConfigFilename+=+appPath+%2B+@"\..\"+%2B+"Web.config";
Configuration+config+=+ConfigurationManager.OpenMappedExeConfiguration(configMap,+ConfigurationUserLevel.None);+|code-block|syntax|javascript|3104292|它的用法如下：|3104293|string+webConfigVariable+=+config.AppSettings.Settings["webConfigVariable"].Value;|3104294|entityMap^0|7|1E|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|T|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|U|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|V|8|@]|D|@]|E|$I|J]]|$1|O|3|-4|5|6|7|W|8|@]|D|@]|E|$]]]|P|$]]

For some reason <code>ConfigurationManager.RefreshSection("appSettings")</code> wasn't working for me. Reloading the Web.Config into a Configuration object seems to work correctly. The following code assumes the Web.Config file is one directory below the executing (bin) folder.

<pre><code>ExeConfigurationFileMap configMap = new ExeConfigurationFileMap();
Uri uriAssemblyFolder = new Uri(System.IO.Path.GetDirectoryName(Assembly.GetExecutingAssembly().GetName().CodeBase));
string appPath = uriAssemblyFolder.LocalPath;
configMap.ExeConfigFilename = appPath + @"\..\" + "Web.config";
Configuration config = ConfigurationManager.OpenMappedExeConfiguration(configMap, ConfigurationUserLevel.None); 
</code></pre>

And is used like: 

<pre><code>string webConfigVariable = config.AppSettings.Settings["webConfigVariable"].Value;
</code></pre>

blocks|key|3104335|text|当appSettings为外部时，.RefreshSection()不起作用。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3104336|但是，您可以使用以下内容更改值：|3104337|ConfigurationManager.AppSettings.Set(key,+value)|code-block|syntax|javascript|3104338|这不会更改文件上的设置，只会更改内存中加载的值。|3104339|因此，我没有使用RefreshSection，而是执行了以下操作：|3104340|string+configFile="path+to+your+config+file";
XmlDocument+xml+=+new+XmlDocument();
xml.Load(configFile);

foreach+(XmlNode+node+in+xml.SelectNodes("/appSettings/add"))
{
++++string+key+=+node.Attributes["key"].Value;
++++string+value=+node.Attributes["value"].Value;
++++ConfigurationManager.AppSettings.Set(key,+value);
}|3104341|任何后续对AppSettings.Get的调用都将包含更新后的值。|3104342|然后，无需重新启动应用程序即可更新appSettings。|3104343|entityMap^0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|W|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|X|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|Y|8|@]|9|@]|A|$]]|$1|M|3|N|5|F|7|Z|8|@]|9|@]|A|$G|H]]|$1|O|3|P|5|6|7|10|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|11|8|@]|9|@]|A|$]]|$1|S|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|T|$]]

.RefreshSection() does not work when the appSettings is external.

You can however use the following to change a value:

<pre><code>ConfigurationManager.AppSettings.Set(key, value)
</code></pre>

This will NOT change the setting on file, only the loaded value in memory.

So instead of using RefreshSection I did the following:

<pre><code>string configFile="path to your config file";
XmlDocument xml = new XmlDocument();
xml.Load(configFile);

foreach (XmlNode node in xml.SelectNodes("/appSettings/add"))
{
 string key = node.Attributes["key"].Value;
 string value= node.Attributes["value"].Value;
 ConfigurationManager.AppSettings.Set(key, value);
}
</code></pre>

Any subsequent calls to AppSettings.Get will contain the updated value.

The appSettings will then be updated without needing to restart the application.

Has anyone got this working in a web application? 

No matter what I do it seems that my appSettings section (redirected from web.config using appSettings file=".\Site\site.config") does not get reloaded. 

Am I doomed to the case of having to just restart the application? I was hoping this method would lead me to a more performant solution.

Update:

By 'reloading' I mean refreshing ConfigurationManager.AppSettings without having to completely restart my ASP.NET application and having to incur the usual startup latency.

Reloading configuration without restarting application using ConfigurationManager.RefreshSection

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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有没有人在web应用程序中实现了这一点？无论我做什么，我的appSettings部分(使用appSettings file=“.\Site\site.config”从web.config重定向)似乎都不会重新加载。我是不是注定要重启应用程序？我希望这个方法能让我找到一个性能更好的解决方案。更新：所谓“重新加载”，我的意...

问在不使用ConfigurationManager.RefreshSection重启应用程序的情况下重新加载配置
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问在不使用ConfigurationManager.RefreshSection重启应用程序的情况下重新加载配置EN