无法找到或加载已注册的.Net Framework数据提供程序

Question

我正在测试我的简单aspx Web表单,我得到上述错误.它在我添加SQL CE 4之前有效.下面是我的web.cofig文件:

<configuration>
 <connectionStrings>
  <add name="ConnectionString" connectionString="Data Source=|DataDirectory|\Database.sdf" providerName="System.Data.SqlServerCe.4.0"/>
</connectionStrings>
<system.web>
 <customErrors mode="Off"/>
  <compilation debug="true">
</compilation>
</system.web>
<system.data>
<DbProviderFactories>
   <remove invariant="System.Data.SqlServerCe.4.0"/>
    <add name="Microsoft SQL Server Compact Data Provider 4.0" invariant="System.Data.SqlServerCe.4.0" description=".NET Framework Data Provider for Microsoft SQL Server Compact" type="System.Data.SqlServerCe.SqlCeProviderFactory, System.Data.SqlServerCe, Version=4.0.0.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91"/>
</DbProviderFactories>
 </system.data>
</configuration>

如何添加SQL CE 4？

Answer 1

我可以建议的一件事是确保将dll System.Data.SqlServerCe设置Copy Local为true并尝试重新部署.