通过web.config中覆盖的machine.config [英] Override machine.config by web.config

问题描述

我学会一起工作内置的.NET配置文件提供程序，并具有以下
问题：

I learn to work with the built-in profile provider of .Net, and have the following problem:

我读到了machine.config中的设置可以通过web.config中的设置被覆盖
的.Net的应用。在machine.config文件进行以下设置有关
对我来说：

I read that the machine.config-settings can be overridden by the web.config-settings of a .Net-Application. The following settings in the machine.config-file are relevant for me:

<connectionStrings>
<add name="LocalSqlServer" connectionString="Data Source=(local);Initial Catalog=aspnetdb;
Integrated Security=True" providerName="System.Data.SqlClient"/>
</connectionStrings>

<profile><providers><add name="AspNetSqlProfileProvider"connectionStringName="LocalSqlServer" applicationName="/" type="System.Web.Profile.SqlProfileProvider, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"/></providers></profile>

下面的设置来设置本地配置文件。
然而，当我复制设置成我的应用程序的web.config并更改
machine.config中的设置，让他们鸵鸟政策工作了，我得到一个配置
错误。
例如，我在machine.config为本地改变供应商的名称。
这应该是没有问题的，因为设置将被覆盖。然而，在运行时
该应用程序我得到的错误：

These settings work to set up local profiles. However, when I copy the settings into the web.config of my application and change the machine.config settings, so that they don´t work any more, I get a configuration error. For example, I change the name of the provider in the machine.config to "Local". This should be no problem, because the settings are overridden. However, when running the application I get the error:

条目AspNetSQLProvider已经被添加（我的翻译）

"The entry "AspNetSQLProvider has already been added" (my translation)

推荐答案

添加＆LT;清/＆GT; 元素的第一个孩子＆LT;＆是connectionStrings GT; 。这会导致配置系统忽略的machine.config 添加的所有连接字符串和使用所提供的新的问题。您还可以使用＆LT;清除方式＆gt; 元素删除单个配置项，如果你不想清除整个事情

Add a <clear /> element as the first child of <connectionStrings>. It'll cause the configuration system to ignore all connection strings added in machine.config and use the new ones provided. You can also use <remove> element to remove a single configuration item if you don't want to clear out the whole thing.

<connectionStrings>
   <clear />
   <add name="LocalSqlServer" connectionString="Data Source=(local);Initial Catalog=aspnetdb;Integrated Security=True" providerName="System.Data.SqlClient"/> 
</connectionStrings>

同样的想法适用于＆LT;供应商方式＆gt; 部分以及

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