Question

我最近将mysql添加到visual studio，并在尝试运行页面时遇到此错误。我在开幕clear之前尝试了connectionstrings命令，似乎无法找出问题所在：

这是我当前状态的web.config：

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>        
    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
  </configSections>
  <connectionStrings>
    <clear/>
    <add name="DefaultConnection1" connectionString="Data Source=(LocalDb)\MSSQLLocalDB;AttachDbFilename=|DataDirectory|\aspnet-ComputingProjectwh-20170404101246.mdf;Initial Catalog=aspnet-ComputingProjectwh-20170404101246;Integrated Security=True" providerName="System.Data.SqlClient" />
    <remove name="LocalMySqlServer" />
    <add name="LocalMySqlServer" connectionString="" providerName="MySql.Data.MySqlClient" />
  </connectionStrings>
  <system.web>
    <membership defaultProvider="MySQLMembershipProvider">
      <providers>
        <clear />
        <remove name="MySQLMembershipProvider" />
        <add name="MySQLMembershipProvider" type="MySql.Web.Security.MySQLMembershipProvider, MySql.Web, Version=6.9.9.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" connectionStringName="LocalMySqlServer" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="true" applicationName="/" requiresUniqueEmail="false" passwordFormat="Clear" maxInvalidPasswordAttempts="5" minRequiredPasswordLength="7" minRequiredNonalphanumericCharacters="1" passwordAttemptWindow="10" passwordStrengthRegularExpression="" />
        <add name="MySQLMembershipProvider" type="MySql.Web.Security.MySQLMembershipProvider, MySql.Web, Version=6.8.3.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" connectionStringName="LocalMySqlServer" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="true" applicationName="/" requiresUniqueEmail="false" passwordFormat="Clear" maxInvalidPasswordAttempts="5" minRequiredPasswordLength="7" minRequiredNonalphanumericCharacters="1" passwordAttemptWindow="10" passwordStrengthRegularExpression="" /></providers>
    </membership>
    <profile defaultProvider="MySQLProfileProvider">
      <providers>
        <clear />
      <remove name="MySQLProfileProvider" />
      <add name="MySQLProfileProvider" type="MySql.Web.Profile.MySQLProfileProvider, MySql.Web, Version=6.9.9.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" connectionStringName="LocalMySqlServer" applicationName="/" />
      <add name="MySQLProfileProvider" type="MySql.Web.Profile.MySQLProfileProvider, MySql.Web, Version=6.8.3.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" connectionStringName="LocalMySqlServer" applicationName="/" /></providers>
    </profile>
    <roleManager defaultProvider="MySQLRoleProvider">
      <providers>
        <clear />
      <remove name="MySQLRoleProvider" />
      <add name="MySQLRoleProvider" type="MySql.Web.Security.MySQLRoleProvider, MySql.Web, Version=6.9.9.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" connectionStringName="LocalMySqlServer" applicationName="/" />
      <add name="MySQLRoleProvider" type="MySql.Web.Security.MySQLRoleProvider, MySql.Web, Version=6.8.3.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" connectionStringName="LocalMySqlServer" applicationName="/" /></providers>
    </roleManager>       
    <sessionState mode="InProc" customProvider="DefaultSessionProvider">
      <providers>
        <add name="DefaultSessionProvider" type="System.Web.Providers.DefaultSessionStateProvider, System.Web.Providers, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" connectionStringName="DefaultConnection" />
      </providers>
    </sessionState>
  <siteMap defaultProvider="MySqlSiteMapProvider">
      <providers>
        <remove name="MySqlSiteMapProvider" />
        <add name="MySqlSiteMapProvider" type="MySql.Web.SiteMap.MySqlSiteMapProvider, MySql.Web, Version=6.9.9.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" connectionStringName="LocalMySqlServer" applicationName="/" />
      </providers>
    </siteMap><webParts>
      <personalization defaultProvider="MySQLPersonalizationProvider">
        <providers>
          <remove name="MySQLPersonalizationProvider" />
          <add name="MySQLPersonalizationProvider" type="MySql.Web.Personalization.MySqlPersonalizationProvider, MySql.Web, Version=6.9.9.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" connectionStringName="LocalMySqlServer" applicationName="/" />
        </providers>
      </personalization>
    </webParts>
  </system.web>
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="EntityFramework" publicKeyToken="b77a5c561934e089" />
        <bindingRedirect oldVersion="0.0.0.0-6.0.0.0" newVersion="6.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="MySql.Data" publicKeyToken="c5687fc88969c44d" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-6.8.3.0" newVersion="6.8.3.0" />
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
  <entityFramework>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
      <parameters>
        <parameter value="mssqllocaldb" />
      </parameters>
    </defaultConnectionFactory>
    <providers>
      <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
    <provider invariantName="MySql.Data.MySqlClient" type="MySql.Data.MySqlClient.MySqlProviderServices, MySql.Data.Entity.EF6, Version=6.9.9.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d"></provider></providers>
  </entityFramework>
<system.data>
    <DbProviderFactories>
      <remove invariant="MySql.Data.MySqlClient" name="MySQL Data Provider" />
      <add name="MySQL Data Provider" invariant="MySql.Data.MySqlClient" description=".Net Framework Data Provider for MySQL" type="MySql.Data.MySqlClient.MySqlClientFactory, MySql.Data, Version=6.9.9.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" />
    <add name="MySQL Data Provider" invariant="MySql.Data.MySqlClient" description=".Net Framework Data Provider for MySQL" type="MySql.Data.MySqlClient.MySqlClientFactory, MySql.Data, Version=6.8.3.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" /></DbProviderFactories>
  </system.data>
</configuration>

这是我得到的错误：

Severity    Code    Description Project File    Line    Suppression State
Warning     C:\Users\danie\documents\visual studio 2015\Projects\ComputingProjectwh\ComputingProjectwh\RevisionPages\Revision Pages List.aspx: ASP.NET runtime error: The entry 'MySQLProfileProvider' has already been added. (C:\Users\danie\documents\visual studio 2015\Projects\ComputingProjectwh\ComputingProjectwh\web.config line 43)  ComputingProjectwh  C:\Users\danie\documents\visual studio 2015\Projects\ComputingProjectwh\ComputingProjectwh\RevisionPages\Revision Pages List.aspx   1

Answer 1

您为MySQL注册了DbProviderFactory两次，版本不同。你只需要一个，推测最新版本。

<DbProviderFactories>
    <remove invariant="MySql.Data.MySqlClient" name="MySQL Data Provider" />
    <add name="MySQL Data Provider" invariant="MySql.Data.MySqlClient" description=".Net Framework Data Provider for MySQL" type="MySql.Data.MySqlClient.MySqlClientFactory, MySql.Data, Version=6.9.9.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" />
    <add name="MySQL Data Provider" invariant="MySql.Data.MySqlClient" description=".Net Framework Data Provider for MySQL" type="MySql.Data.MySqlClient.MySqlClientFactory, MySql.Data, Version=6.8.3.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" />
</DbProviderFactories>

应该是：

<DbProviderFactories>
    <remove invariant="MySql.Data.MySqlClient" name="MySQL Data Provider" />
    <add name="MySQL Data Provider" invariant="MySql.Data.MySqlClient" description=".Net Framework Data Provider for MySQL" type="MySql.Data.MySqlClient.MySqlClientFactory, MySql.Data, Version=6.9.9.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" />
</DbProviderFactories>

绑定重定向应该注意将旧版本指向最新版本，但是您应该检查所涉及的所有项目并确保它们引用最新版本，然后您可以删除绑定重定向。

配置文件提供程序也是如此。如果清除提供程序，则无需删除语句。你有：

<profile defaultProvider="MySQLProfileProvider">
  <providers>
    <clear />
    <remove name="MySQLProfileProvider" />
    <add name="MySQLProfileProvider" type="MySql.Web.Profile.MySQLProfileProvider, MySql.Web, Version=6.9.9.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" connectionStringName="LocalMySqlServer" applicationName="/" />
    <add name="MySQLProfileProvider" type="MySql.Web.Profile.MySQLProfileProvider, MySql.Web, Version=6.8.3.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" connectionStringName="LocalMySqlServer" applicationName="/" />
  </providers>
</profile>

应该是：

<profile defaultProvider="MySQLProfileProvider">
  <providers>
    <clear />
    <add name="MySQLProfileProvider" type="MySql.Web.Profile.MySQLProfileProvider, MySql.Web, Version=6.9.9.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" connectionStringName="LocalMySqlServer" applicationName="/" />
  </providers>
</profile>

遵循删除所有已注册多次的提供商的一般做法。

条目MySqlProfileProvider已经添加了web.config错误asp

1 个答案: