已定义配置节“system.web/profile”

Question

我之前的web.config文件出现了问题：HTML button sending input text data to ASP side。我实际上是通过installing the System.Web.Providers package来解决的。然而，当我再次运行我的代码时，我得到了this screen。上面写着：Config section 'system.web/profile' already defined. Sections must only appear once per config file. See the help topic <location> for exceptions

这是我的web.config：

<?xml version="1.0" encoding="utf-8"?>
<!--
  For more information on how to configure your ASP.NET application, please visit
  http://go.microsoft.com/fwlink/?LinkId=169433
  -->
<configuration>
    <configSections>
        <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
        <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
    </configSections>
    <system.web>
        <authentication mode="Forms" />
        <compilation debug="true" targetFramework="4.0" />
        <profile defaultProvider="AspNetSqlProfileProvider">
            <providers>
                <clear />
                <add name="AspNetSqlProfileProvider" type="System.Web.Profile.SqlProfileProvider, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" connectionStringName="LocalSqlServer" applicationName="/" />
            </providers>
        </profile>
        <membership defaultProvider="DefaultMembershipProvider">
            <providers>
            <clear />
            <add connectionStringName="LocalSqlServer" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="false" requiresUniqueEmail="false" maxInvalidPasswordAttempts="5" minRequiredPasswordLength="6" minRequiredNonalphanumericCharacters="0" passwordAttemptWindow="10" applicationName="/" name="AspNetSqlMembershipProvider" type="System.Web.Security.SqlMembershipProvider, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />
            <add name="DefaultMembershipProvider" type="System.Web.Providers.DefaultMembershipProvider, System.Web.Providers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" connectionStringName="DefaultConnection" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="false" requiresUniqueEmail="false" maxInvalidPasswordAttempts="5" minRequiredPasswordLength="6" minRequiredNonalphanumericCharacters="0" passwordAttemptWindow="10" applicationName="/" /></providers>
        </membership>
        <roleManager enabled="true" defaultProvider="DefaultRoleProvider">
            <providers>
                <clear />
                <add connectionStringName="LocalSqlServer" applicationName="/" name="AspNetSqlRoleProvider" type="System.Web.Security.SqlRoleProvider, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />
                <add name="DefaultRoleProvider" type="System.Web.Providers.DefaultRoleProvider, System.Web.Providers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" connectionStringName="DefaultConnection" applicationName="/" />
            </providers>
        </roleManager>
        <!--
                If you are deploying to a cloud environment that has multiple web server instances,
                you should change session state mode from "InProc" to "Custom". In addition,
                change the connection string named "DefaultConnection" to connect to an instance
                of SQL Server (including SQL Azure and SQL  Compact) instead of to SQL Server Express.
          -->
        <!--
                If you are deploying to a cloud environment that has multiple web server instances,
                you should change session state mode from "InProc" to "Custom". In addition,
                change the connection string named "DefaultConnection" to connect to an instance
                of SQL Server (including SQL Azure and SQL  Compact) instead of to SQL Server Express.
        -->
        <sessionState mode="Custom" customProvider="DefaultSessionProvider">
            <providers>
                <add name="DefaultSessionProvider" type="System.Web.Providers.DefaultSessionStateProvider, System.Web.Providers, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" connectionStringName="LocalSqlServer" />
            </providers>
        </sessionState>
        <profile defaultProvider="DefaultProfileProvider">
            <providers>
                <add name="DefaultProfileProvider" type="System.Web.Providers.DefaultProfileProvider, System.Web.Providers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" connectionStringName="DefaultConnection" applicationName="/" />
            </providers>
        </profile>
        <sessionState mode="InProc" customProvider="DefaultSessionProvider">
            <providers>
                <add name="DefaultSessionProvider" type="System.Web.Providers.DefaultSessionStateProvider, System.Web.Providers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" connectionStringName="DefaultConnection" />
            </providers>
        </sessionState>
    </system.web>
    <entityFramework>
        <defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
            <providers>
                <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
            </providers>
    </entityFramework>
    <connectionStrings>
        <remove name="LocalSqlServer" />
            <add name="LocalSqlServer" connectionString="Data Source=roosterdbdev;Database=RoosterDatabase;User Id=; Password=;MultipleActiveResultSets=True" providerName="System.Data.SqlClient" />
    </connectionStrings>
</configuration>

显然，问题出在第50行：<profile defaultProvider="DefaultProfileProvider">。但是，当我注释掉它时，它会抱怨它前面的第一个标签。

我该如何解决这个问题？

Answer 1

这里有两个<profile ...>和两个<sessionState ...>部分。

去掉这些，看看效果如何。

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

再往下走

<sessionState mode="Custom" customProvider="DefaultSessionProvider">
     <providers>
          <add name="DefaultSessionProvider" type="System.Web.Providers.DefaultSessionStateProvider, System.Web.Providers, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" connectionStringName="LocalSqlServer" />
     </providers>
</sessionState>

完整版本如下

<?xml version="1.0" encoding="utf-8"?>
<!--
  For more information on how to configure your ASP.NET application, please visit
  http://go.microsoft.com/fwlink/?LinkId=169433
  -->
<configuration>
    <configSections>
        <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
        <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
    </configSections>
    <system.web>
        <authentication mode="Forms" />
        <compilation debug="true" targetFramework="4.0" />
        <profile defaultProvider="AspNetSqlProfileProvider">
            <providers>
                <clear />
                <add name="AspNetSqlProfileProvider" type="System.Web.Profile.SqlProfileProvider, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" connectionStringName="LocalSqlServer" applicationName="/" />
            </providers>
        </profile>
        <membership defaultProvider="DefaultMembershipProvider">
            <providers>
            <clear />
            <add connectionStringName="LocalSqlServer" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="false" requiresUniqueEmail="false" maxInvalidPasswordAttempts="5" minRequiredPasswordLength="6" minRequiredNonalphanumericCharacters="0" passwordAttemptWindow="10" applicationName="/" name="AspNetSqlMembershipProvider" type="System.Web.Security.SqlMembershipProvider, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />
            <add name="DefaultMembershipProvider" type="System.Web.Providers.DefaultMembershipProvider, System.Web.Providers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" connectionStringName="DefaultConnection" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="false" requiresUniqueEmail="false" maxInvalidPasswordAttempts="5" minRequiredPasswordLength="6" minRequiredNonalphanumericCharacters="0" passwordAttemptWindow="10" applicationName="/" /></providers>
        </membership>
        <roleManager enabled="true" defaultProvider="DefaultRoleProvider">
            <providers>
                <clear />
                <add connectionStringName="LocalSqlServer" applicationName="/" name="AspNetSqlRoleProvider" type="System.Web.Security.SqlRoleProvider, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />
                <add name="DefaultRoleProvider" type="System.Web.Providers.DefaultRoleProvider, System.Web.Providers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" connectionStringName="DefaultConnection" applicationName="/" />
            </providers>
        </roleManager>
        <!--
                If you are deploying to a cloud environment that has multiple web server instances,
                you should change session state mode from "InProc" to "Custom". In addition,
                change the connection string named "DefaultConnection" to connect to an instance
                of SQL Server (including SQL Azure and SQL  Compact) instead of to SQL Server Express.
          -->
        <!--
                If you are deploying to a cloud environment that has multiple web server instances,
                you should change session state mode from "InProc" to "Custom". In addition,
                change the connection string named "DefaultConnection" to connect to an instance
                of SQL Server (including SQL Azure and SQL  Compact) instead of to SQL Server Express.
        -->
        <profile defaultProvider="DefaultProfileProvider">
            <providers>
                <add name="DefaultProfileProvider" type="System.Web.Providers.DefaultProfileProvider, System.Web.Providers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" connectionStringName="DefaultConnection" applicationName="/" />
            </providers>
        </profile>
        <sessionState mode="InProc" customProvider="DefaultSessionProvider">
            <providers>
                <add name="DefaultSessionProvider" type="System.Web.Providers.DefaultSessionStateProvider, System.Web.Providers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" connectionStringName="DefaultConnection" />
            </providers>
        </sessionState>
    </system.web>
    <entityFramework>
        <defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
            <providers>
                <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
            </providers>
    </entityFramework>
    <connectionStrings>
        <remove name="LocalSqlServer" />
            <add name="LocalSqlServer" connectionString="Data Source=roosterdbdev;Database=RoosterDatabase;User Id=blah; Password=blah;MultipleActiveResultSets=True" providerName="System.Data.SqlClient" />
    </connectionStrings>
</configuration>