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我有兩個項目,其中一個包含實體模型並充當DAL,另一個使用該模型並實現應用程序邏輯。訪問單獨項目中的實體模型時出錯
該模型是一個類庫項目,該應用程序是一個Windows窗體項目。
具有項目下面的app.config文件,並在窗體項目已經引用System.Data.Entity的,當我運行的WinForms應用程序,我得到以下錯誤:
附加信息:無法加載實體框架提供程序類型「System.Data.Entity.SqlServer.SqlProviderServices,EntityFramework.SqlServer」,該實體框架提供程序在具有不變名稱「System.Data.SqlClient」的ADO.NET提供程序的應用程序配置文件中註冊。確保使用裝配限定的名稱,並且該裝配可用於正在運行的應用程序
您認爲問題可能出在哪裏?
DAL項目的的app.config:
<?xml version="1.0" encoding="utf-8" ?>
<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>
<connectionStrings>
<add name="ProviderInterfaceContext" connectionString="metadata=res://*/ProviderInterfaceModel.csdl|res://*/ProviderInterfaceModel.ssdl|res://*/ProviderInterfaceModel.msl;provider=System.Data.SqlClient;provider connection string="data source=192.168.2.12;initial catalog=ProviderInterface;user id=--;password=---;multipleactiveresultsets=True;application name=EntityFramework"" providerName="System.Data.EntityClient" />
</connectionStrings>
<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" />
</providers>
</entityFramework>
<system.serviceModel>
<client>
<endpoint address=""
binding="basicHttpBinding"
contract="PrizeServiceSoap" name="PrizeServiceSoap" />
</client>
</system.serviceModel>
</configuration>
的的WinForms的app.config:
<?xml version="1.0" encoding="utf-8" ?>
<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>
<connectionStrings>
<add name="ProviderInterfaceContext" connectionString="metadata=res://*/ProviderInterfaceModel.csdl|res://*/ProviderInterfaceModel.ssdl|res://*/ProviderInterfaceModel.msl;provider=System.Data.SqlClient;provider connection string="data source=192.168.2.12;initial catalog=ProviderInterface;user id=---;password=----;multipleactiveresultsets=True;application name=EntityFramework"" providerName="System.Data.EntityClient" />
</connectionStrings>
<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" />
</providers>
</entityFramework>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
</startup>
</configuration>