[英]Entity Framework: The underlying provider failed on Open - through WCF service
I have a WCF service that runs on IIS and it can't access the SQL Server that runs on the same machine. 我有一个在IIS上运行的WCF服务,它无法访问在同一台计算机上运行的SQL Server。 If I use the WCF Test Client it works fine. 如果我使用WCF测试客户端,则可以正常运行。 What can be the problem? 可能是什么问题? Thx! 谢谢!
Contents of the service's web.config: 服务的web.config内容:
<?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>
<appSettings>
<add key="aspnet:UseTaskFriendlySynchronizationContext" value="true" />
</appSettings>
<system.web>
<compilation debug="true" targetFramework="4.5" />
<httpRuntime targetFramework="4.5" />
</system.web>
<system.serviceModel>
<bindings>
<wsDualHttpBinding></wsDualHttpBinding>
</bindings>
<behaviors>
<serviceBehaviors>
<behavior>
<!-- To avoid disclosing metadata information, set the values below to false before deployment -->
<serviceMetadata httpGetEnabled="true" httpsGetEnabled="true" />
<!-- To receive exception details in faults for debugging purposes, set the value below to true. Set to false before deployment to avoid disclosing exception information -->
<serviceDebug includeExceptionDetailInFaults="false" />
</behavior>
</serviceBehaviors>
</behaviors>
<protocolMapping>
<add binding="wsDualHttpBinding" scheme="https" />
</protocolMapping>
<serviceHostingEnvironment aspNetCompatibilityEnabled="true" multipleSiteBindingsEnabled="true" />
</system.serviceModel>
<system.webServer>
<modules runAllManagedModulesForAllRequests="true" />
<!--
To browse web app root directory during debugging, set the value below to true.
Set to false before deployment to avoid disclosing web app folder information.
-->
<directoryBrowse enabled="true" />
</system.webServer>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
<parameters>
<parameter value="v11.0" />
</parameters>
</defaultConnectionFactory>
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
</providers>
</entityFramework>
<connectionStrings>
<add name="TestEntities" connectionString="metadata=res://*/EntityModel.csdl|res://*/EntityModel.ssdl|res://*/EntityModel.msl;provider=System.Data.SqlClient;provider connection string="data source=localhost;initial catalog=Test;integrated security=True;MultipleActiveResultSets=True;App=EntityFramework"" providerName="System.Data.EntityClient" />
</connectionStrings>
</configuration>
Probably the app pool user you have the WCF service running against does not have permissions to access the sql database. 您运行了WCF服务的应用程序池用户可能没有访问sql数据库的权限。 You can either add yourself as a user or assign permissions for the current app pool user. 您既可以将自己添加为用户,也可以为当前应用程序池用户分配权限。
Similar problem to How to use domain windows user account as app pool identity 与如何使用域Windows用户帐户作为应用程序池标识类似的问题
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