C# 每个配置文件只允许一个 configSections 元素，如果存在，必须是根配置元素的第一个子元素
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/13623896/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Only one configSections element allowed per config file and if present must be the first child of the root configuration element
提问by Mahesh
I am developing the console application and when I run the .exe file, I get the following error:
我正在开发控制台应用程序，当我运行 .exe 文件时，出现以下错误：
system.Configuration.ConfigurationErrorsException: Only one<configSections>element allowed per config file and if present must be the first child of the root<configuration>element.
system.Configuration.ConfigurationErrorsException:<configSections>每个配置文件只允许一个元素，如果存在，必须是根<configuration>元素的第一个子元素。
Here's my App.configfile:
这是我的App.config文件：
<configuration>
<startup useLegacyV2RuntimeActivationPolicy="true">
<supportedRuntime version="v4.0"/>
</startup>
<configSections>
<section name="Reva.Properties.Settings" type="System.Configuration.ClientSettingsSection, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
</configSections>
<!-- ... -->
However, if I remove the following startupsection, then it works fine
但是，如果我删除以下startup部分，则它可以正常工作
<startup useLegacyV2RuntimeActivationPolicy="true">
<supportedRuntime version="v4.0"/>
</startup>
采纳答案by Daniel Hilgarth
The error message itself actually details the correct fix:
错误消息本身实际上详细说明了正确的修复：
configSectionsmust be the first child* of the root element:
configSections必须是根元素的第一个子元素 *：
*emphasis added
*强调添加
So just move the configSectionsto the top:
所以只需将 移动configSections到顶部：
<configuration>
<configSections>
<section name="Reva.Properties.Settings" type="System.Configuration.ClientSettingsSection, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
</configSections>
<startup useLegacyV2RuntimeActivationPolicy="true">
<supportedRuntime version="v4.0"/>
</startup>
</configuration>
回答by MAFAIZ
The Error web.config File
错误 web.config 文件
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<connectionStrings>
<add name="SQLConnect"
connectionString="Data Source=SAHIL; Initial Catalog=Demo; Integrated Security=SSPI"
providerName="System.Data.SqlClient" />
</connectionStrings>
<configSections>
<sectionnamesectionname="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework,
Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
</configSections>
:
:
:
:
:
:
:
</configuration>
The Error Was
错误是
To fix the error, I rearranged the elements and the error was fixed.
为了修复错误，我重新排列了元素并修复了错误。
