web.config为啥出错?

Question

错误 1 各个节在每个配置文件中只能出现一次。有关异常的信息，请参阅帮助主题 <location>。 E:\share\webserver\web.config 31
<configuration>
    <configSections>
      <sectionGroup name="system.web.extensions" type="System.Web.Configuration.SystemWebExtensionsSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
        <sectionGroup name="scripting" type="System.Web.Configuration.ScriptingSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
          <section name="scriptResourceHandler" type="System.Web.Configuration.ScriptingScriptResourceHandlerSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/>
          <sectionGroup name="webServices" type="System.Web.Configuration.ScriptingWebServicesSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
            <section name="jsonSerialization" type="System.Web.Configuration.ScriptingJsonSerializationSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="Everywhere" />
            <section name="profileService" type="System.Web.Configuration.ScriptingProfileServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication" />
            <section name="authenticationService" type="System.Web.Configuration.ScriptingAuthenticationServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication" />
            <section name="roleService" type="System.Web.Configuration.ScriptingRoleServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication" />
          </sectionGroup>
        </sectionGroup>
      </sectionGroup>
    </configSections>  <appSettings>
    <add key="connstring" value="server=192.168.2.1.;uid=sa;pwd=sa;database=test"/>
     
  </appSettings>
    <appSettings/>
    <connectionStrings/>

Answer 1

  <appSettings>
    <add key="connstring" value="server=192.168.2.1.;uid=sa;pwd=sa;database=test"/>
     
  </appSettings>
    <appSettings/>
多了一个appsettings节点,见红色部分

Answer 2

  <appSettings>
    <add key="connstring" value="server=192.168.2.1.;uid=sa;pwd=sa;database=test"/>
     
  </appSettings>
    <appSettings/>这里多了一个appSetting配置结，去掉 <appSettings/>

Answer 3

 <appSettings/>
把这句去掉！

Answer 4

 <appSettings/>
删除

Answer 5

 </appSettings>
这个节点？

Answer 6

删除 </appSettings>
下面的节点就可以。

Answer 7

<appSettings>
    <add key="connstring" value="server=192.168.2.1.;uid=sa;pwd=sa;database=test"/>
     
  </appSettings>
    <appSettings/>除掉